Code

Add support for 256 colors by allowing "colorN" names similar to Mutt
[tig.git] / tig.c
diff --git a/tig.c b/tig.c
index a8976b98d864ab25dc9014d99ff8bae5b10ca0d6..79afdb1a11f8ab83dba1b7129c21b102fb42533a 100644 (file)
--- a/tig.c
+++ b/tig.c
@@ -68,9 +68,8 @@ static void __NORETURN die(const char *err, ...);
 static void warn(const char *msg, ...);
 static void report(const char *msg, ...);
 static void set_nonblocking_input(bool loading);
-static size_t utf8_length(const char *string, int *width, size_t max_width, int *trimmed, bool reserve);
-static bool prompt_yesno(const char *prompt);
 static int load_refs(void);
+static size_t utf8_length(const char **string, size_t col, int *width, size_t max_width, int *trimmed, bool reserve);
 
 #define ABS(x)         ((x) >= 0  ? (x) : -(x))
 #define MIN(x, y)      ((x) < (y) ? (x) :  (y))
@@ -110,6 +109,7 @@ static int load_refs(void);
 
 /* The default interval between line numbers. */
 #define NUMBER_INTERVAL        5
+#define SCROLL_INTERVAL        1
 
 #define TAB_SIZE       8
 
@@ -121,7 +121,7 @@ static int load_refs(void);
 #define GIT_CONFIG "config"
 #endif
 
-/* Some ascii-shorthands fitted into the ncurses namespace. */
+/* Some ASCII-shorthands fitted into the ncurses namespace. */
 #define KEY_TAB                '\t'
 #define KEY_RETURN     '\r'
 #define KEY_ESC                27
@@ -148,29 +148,17 @@ enum format_flags {
 
 static bool format_argv(const char *dst[], const char *src[], enum format_flags flags);
 
-struct int_map {
-       const char *name;
-       int namelen;
-       int value;
+enum input_status {
+       INPUT_OK,
+       INPUT_SKIP,
+       INPUT_STOP,
+       INPUT_CANCEL
 };
 
-static int
-set_from_int_map(struct int_map *map, size_t map_size,
-                int *value, const char *name, int namelen)
-{
-
-       int i;
-
-       for (i = 0; i < map_size; i++)
-               if (namelen == map[i].namelen &&
-                   !strncasecmp(name, map[i].name, namelen)) {
-                       *value = map[i].value;
-                       return OK;
-               }
-
-       return ERR;
-}
+typedef enum input_status (*input_handler)(void *data, char *buf, int c);
 
+static char *prompt_input(const char *prompt, input_handler handler, void *data);
+static bool prompt_yesno(const char *prompt);
 
 /*
  * String helpers
@@ -200,6 +188,41 @@ string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
 #define string_add(dst, from, src) \
        string_ncopy_do(dst + (from), sizeof(dst) - (from), src, sizeof(src))
 
+static size_t
+string_expand_length(const char *line, int tabsize)
+{
+       size_t size, pos;
+
+       for (pos = 0; line[pos]; pos++) {
+               if (line[pos] == '\t' && tabsize > 0)
+                       size += tabsize - (size % tabsize);
+               else
+                       size++;
+       }
+       return size;
+}
+
+static void
+string_expand(char *dst, size_t dstlen, const char *src, int tabsize)
+{
+       size_t size, pos;
+
+       for (size = pos = 0; size < dstlen - 1 && src[pos]; pos++) {
+               if (src[pos] == '\t') {
+                       size_t expanded = tabsize - (size % tabsize);
+
+                       if (expanded + size >= dstlen - 1)
+                               expanded = dstlen - size - 1;
+                       memcpy(dst + size, "        ", expanded);
+                       size += expanded;
+               } else {
+                       dst[size++] = src[pos];
+               }
+       }
+
+       dst[size] = 0;
+}
+
 static char *
 chomp_string(char *name)
 {
@@ -259,6 +282,33 @@ string_enum_compare(const char *str1, const char *str2, int len)
        return 0;
 }
 
+struct enum_map {
+       const char *name;
+       int namelen;
+       int value;
+};
+
+#define ENUM_MAP(name, value) { name, STRING_SIZE(name), value }
+
+static bool
+map_enum_do(struct enum_map *map, size_t map_size, int *value, const char *name)
+{
+       size_t namelen = strlen(name);
+       int i;
+
+       for (i = 0; i < map_size; i++)
+               if (namelen == map[i].namelen &&
+                   !string_enum_compare(name, map[i].name, namelen)) {
+                       *value = map[i].value;
+                       return TRUE;
+               }
+
+       return FALSE;
+}
+
+#define map_enum(attr, map, name) \
+       map_enum_do(map, ARRAY_SIZE(map), attr, name)
+
 #define prefixcmp(str1, str2) \
        strncmp(str1, str2, STRING_SIZE(str2))
 
@@ -282,7 +332,7 @@ argv_from_string(const char *argv[SIZEOF_ARG], int *argc, char *cmd)
 
                cmd[valuelen] = 0;
                argv[(*argc)++] = chomp_string(cmd);
-               cmd += valuelen + advance;
+               cmd = chomp_string(cmd + valuelen + advance);
        }
 
        if (*argc < SIZEOF_ARG)
@@ -313,6 +363,7 @@ enum io_type {
        IO_FG,                  /* Execute command with same std{in,out,err}. */
        IO_RD,                  /* Read only fork+exec IO. */
        IO_WR,                  /* Write only fork+exec IO. */
+       IO_AP,                  /* Append fork+exec output to file. */
 };
 
 struct io {
@@ -367,7 +418,7 @@ io_open(struct io *io, const char *name)
 static bool
 kill_io(struct io *io)
 {
-       return kill(io->pid, SIGKILL) != -1;
+       return io->pid == 0 || kill(io->pid, SIGKILL) != -1;
 }
 
 static bool
@@ -411,6 +462,8 @@ start_io(struct io *io)
        if ((io->type == IO_RD || io->type == IO_WR) &&
            pipe(pipefds) < 0)
                return FALSE;
+       else if (io->type == IO_AP)
+               pipefds[1] = io->pipe;
 
        if ((io->pid = fork())) {
                if (pipefds[!(io->type == IO_WR)] != -1)
@@ -424,7 +477,8 @@ start_io(struct io *io)
                if (io->type != IO_FG) {
                        int devnull = open("/dev/null", O_RDWR);
                        int readfd  = io->type == IO_WR ? pipefds[0] : devnull;
-                       int writefd = io->type == IO_RD ? pipefds[1] : devnull;
+                       int writefd = (io->type == IO_RD || io->type == IO_AP)
+                                                       ? pipefds[1] : devnull;
 
                        dup2(readfd,  STDIN_FILENO);
                        dup2(writefd, STDOUT_FILENO);
@@ -486,6 +540,19 @@ run_io_fg(const char **argv, const char *dir)
        return run_io_do(&io);
 }
 
+static bool
+run_io_append(const char **argv, enum format_flags flags, int fd)
+{
+       struct io io = {};
+
+       init_io(&io, NULL, IO_AP);
+       io.pipe = fd;
+       if (format_argv(io.argv, argv, flags))
+               return run_io_do(&io);
+       close(fd);
+       return FALSE;
+}
+
 static bool
 run_io_rd(struct io *io, const char **argv, enum format_flags flags)
 {
@@ -608,24 +675,75 @@ io_write(struct io *io, const void *buf, size_t bufsize)
        return written == bufsize;
 }
 
+static bool
+io_read_buf(struct io *io, char buf[], size_t bufsize)
+{
+       bool error;
+
+       io->buf = io->bufpos = buf;
+       io->bufalloc = bufsize;
+       error = !io_get(io, '\n', TRUE) && io_error(io);
+       io->buf = NULL;
+
+       return done_io(io) || error;
+}
+
 static bool
 run_io_buf(const char **argv, char buf[], size_t bufsize)
 {
        struct io io = {};
-       bool error;
 
-       if (!run_io_rd(&io, argv, FORMAT_NONE))
-               return FALSE;
+       return run_io_rd(&io, argv, FORMAT_NONE) && io_read_buf(&io, buf, bufsize);
+}
+
+static int
+io_load(struct io *io, const char *separators,
+       int (*read_property)(char *, size_t, char *, size_t))
+{
+       char *name;
+       int state = OK;
+
+       if (!start_io(io))
+               return ERR;
+
+       while (state == OK && (name = io_get(io, '\n', TRUE))) {
+               char *value;
+               size_t namelen;
+               size_t valuelen;
+
+               name = chomp_string(name);
+               namelen = strcspn(name, separators);
+
+               if (name[namelen]) {
+                       name[namelen] = 0;
+                       value = chomp_string(name + namelen + 1);
+                       valuelen = strlen(value);
+
+               } else {
+                       value = "";
+                       valuelen = 0;
+               }
+
+               state = read_property(name, namelen, value, valuelen);
+       }
+
+       if (state != ERR && io_error(io))
+               state = ERR;
+       done_io(io);
+
+       return state;
+}
 
-       io.buf = io.bufpos = buf;
-       io.bufalloc = bufsize;
-       error = !io_get(&io, '\n', TRUE) && io_error(&io);
-       io.buf = NULL;
+static int
+run_io_load(const char **argv, const char *separators,
+           int (*read_property)(char *, size_t, char *, size_t))
+{
+       struct io io = {};
 
-       return done_io(&io) || error;
+       return init_io_rd(&io, argv, NULL, FORMAT_NONE)
+               ? io_load(&io, separators, read_property) : ERR;
 }
 
-static int read_properties(struct io *io, const char *separators, int (*read)(char *, size_t, char *, size_t));
 
 /*
  * User requests
@@ -649,6 +767,7 @@ static int read_properties(struct io *io, const char *separators, int (*read)(ch
        REQ_(ENTER,             "Enter current line and scroll"), \
        REQ_(NEXT,              "Move to next"), \
        REQ_(PREVIOUS,          "Move to previous"), \
+       REQ_(PARENT,            "Move to parent"), \
        REQ_(VIEW_NEXT,         "Move focus to next view"), \
        REQ_(REFRESH,           "Reload and refresh"), \
        REQ_(MAXIMIZE,          "Maximize the current view"), \
@@ -660,7 +779,6 @@ static int read_properties(struct io *io, const char *separators, int (*read)(ch
        REQ_(STATUS_REVERT,     "Revert file changes"), \
        REQ_(STATUS_MERGE,      "Merge file using external tool"), \
        REQ_(STAGE_NEXT,        "Find next chunk to stage"), \
-       REQ_(TREE_PARENT,       "Switch to parent directory in tree view"), \
        \
        REQ_GROUP("Cursor navigation") \
        REQ_(MOVE_UP,           "Move cursor one line up"), \
@@ -671,6 +789,8 @@ static int read_properties(struct io *io, const char *separators, int (*read)(ch
        REQ_(MOVE_LAST_LINE,    "Move cursor to last line"), \
        \
        REQ_GROUP("Scrolling") \
+       REQ_(SCROLL_LEFT,       "Scroll two columns left"), \
+       REQ_(SCROLL_RIGHT,      "Scroll two columns right"), \
        REQ_(SCROLL_LINE_UP,    "Scroll one line up"), \
        REQ_(SCROLL_LINE_DOWN,  "Scroll one line down"), \
        REQ_(SCROLL_PAGE_UP,    "Scroll one page up"), \
@@ -692,7 +812,6 @@ static int read_properties(struct io *io, const char *separators, int (*read)(ch
        REQ_GROUP("Misc") \
        REQ_(PROMPT,            "Bring up the prompt"), \
        REQ_(SCREEN_REDRAW,     "Redraw the screen"), \
-       REQ_(SCREEN_RESIZE,     "Resize the screen"), \
        REQ_(SHOW_VERSION,      "Show version information"), \
        REQ_(STOP_LOADING,      "Stop all loading views"), \
        REQ_(EDIT,              "Open in editor"), \
@@ -746,19 +865,6 @@ get_request(const char *name)
  * Options
  */
 
-static const char usage[] =
-"tig " TIG_VERSION " (" __DATE__ ")\n"
-"\n"
-"Usage: tig        [options] [revs] [--] [paths]\n"
-"   or: tig show   [options] [revs] [--] [paths]\n"
-"   or: tig blame  [rev] path\n"
-"   or: tig status\n"
-"   or: tig <      [git command output]\n"
-"\n"
-"Options:\n"
-"  -v, --version   Show version and exit\n"
-"  -h, --help      Show help message and exit";
-
 /* Option and state variables. */
 static bool opt_date                   = TRUE;
 static bool opt_author                 = TRUE;
@@ -781,6 +887,7 @@ static char opt_codeset[20]         = "UTF-8";
 static iconv_t opt_iconv               = ICONV_NONE;
 static char opt_search[SIZEOF_STR]     = "";
 static char opt_cdup[SIZEOF_STR]       = "";
+static char opt_prefix[SIZEOF_STR]     = "";
 static char opt_git_dir[SIZEOF_STR]    = "";
 static signed char opt_is_inside_work_tree     = -1; /* set to TRUE or FALSE */
 static char opt_editor[SIZEOF_STR]     = "";
@@ -789,89 +896,6 @@ static FILE *opt_tty                       = NULL;
 #define is_initial_commit()    (!*opt_head_rev)
 #define is_head_commit(rev)    (!strcmp((rev), "HEAD") || !strcmp(opt_head_rev, (rev)))
 
-static enum request
-parse_options(int argc, const char *argv[], const char ***run_argv)
-{
-       enum request request = REQ_VIEW_MAIN;
-       const char *subcommand;
-       bool seen_dashdash = FALSE;
-       /* XXX: This is vulnerable to the user overriding options
-        * required for the main view parser. */
-       static const char *custom_argv[SIZEOF_ARG] = {
-               "git", "log", "--no-color", "--pretty=raw", "--parents",
-                       "--topo-order", NULL
-       };
-       int i, j = 6;
-
-       if (!isatty(STDIN_FILENO))
-               return REQ_VIEW_PAGER;
-
-       if (argc <= 1)
-               return REQ_VIEW_MAIN;
-
-       subcommand = argv[1];
-       if (!strcmp(subcommand, "status") || !strcmp(subcommand, "-S")) {
-               if (!strcmp(subcommand, "-S"))
-                       warn("`-S' has been deprecated; use `tig status' instead");
-               if (argc > 2)
-                       warn("ignoring arguments after `%s'", subcommand);
-               return REQ_VIEW_STATUS;
-
-       } else if (!strcmp(subcommand, "blame")) {
-               if (argc <= 2 || argc > 4)
-                       die("invalid number of options to blame\n\n%s", usage);
-
-               i = 2;
-               if (argc == 4) {
-                       string_ncopy(opt_ref, argv[i], strlen(argv[i]));
-                       i++;
-               }
-
-               string_ncopy(opt_file, argv[i], strlen(argv[i]));
-               return REQ_VIEW_BLAME;
-
-       } else if (!strcmp(subcommand, "show")) {
-               request = REQ_VIEW_DIFF;
-
-       } else if (!strcmp(subcommand, "log") || !strcmp(subcommand, "diff")) {
-               request = subcommand[0] == 'l' ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
-               warn("`tig %s' has been deprecated", subcommand);
-
-       } else {
-               subcommand = NULL;
-       }
-
-       if (subcommand) {
-               custom_argv[1] = subcommand;
-               j = 2;
-       }
-
-       for (i = 1 + !!subcommand; i < argc; i++) {
-               const char *opt = argv[i];
-
-               if (seen_dashdash || !strcmp(opt, "--")) {
-                       seen_dashdash = TRUE;
-
-               } else if (!strcmp(opt, "-v") || !strcmp(opt, "--version")) {
-                       printf("tig version %s\n", TIG_VERSION);
-                       return REQ_NONE;
-
-               } else if (!strcmp(opt, "-h") || !strcmp(opt, "--help")) {
-                       printf("%s\n", usage);
-                       return REQ_NONE;
-               }
-
-               custom_argv[j++] = opt;
-               if (j >= ARRAY_SIZE(custom_argv))
-                       die("command too long");
-       }
-
-       custom_argv[j] = NULL;
-       *run_argv = custom_argv;
-
-       return request;
-}
-
 
 /*
  * Line-oriented content detection.
@@ -902,7 +926,7 @@ LINE(PP_REFS,          "Refs: ",            COLOR_RED,      COLOR_DEFAULT,  0), \
 LINE(COMMIT,      "commit ",           COLOR_GREEN,    COLOR_DEFAULT,  0), \
 LINE(PARENT,      "parent ",           COLOR_BLUE,     COLOR_DEFAULT,  0), \
 LINE(TREE,        "tree ",             COLOR_BLUE,     COLOR_DEFAULT,  0), \
-LINE(AUTHOR,      "author ",           COLOR_CYAN,     COLOR_DEFAULT,  0), \
+LINE(AUTHOR,      "author ",           COLOR_GREEN,    COLOR_DEFAULT,  0), \
 LINE(COMMITTER,           "committer ",        COLOR_MAGENTA,  COLOR_DEFAULT,  0), \
 LINE(SIGNOFF,     "    Signed-off-by", COLOR_YELLOW,   COLOR_DEFAULT,  0), \
 LINE(ACKED,       "    Acked-by",      COLOR_YELLOW,   COLOR_DEFAULT,  0), \
@@ -911,10 +935,10 @@ LINE(CURSOR,         "",                  COLOR_WHITE,    COLOR_GREEN,    A_BOLD), \
 LINE(STATUS,      "",                  COLOR_GREEN,    COLOR_DEFAULT,  0), \
 LINE(DELIMITER,           "",                  COLOR_MAGENTA,  COLOR_DEFAULT,  0), \
 LINE(DATE,         "",                 COLOR_BLUE,     COLOR_DEFAULT,  0), \
+LINE(MODE,         "",                 COLOR_CYAN,     COLOR_DEFAULT,  0), \
 LINE(LINE_NUMBER,  "",                 COLOR_CYAN,     COLOR_DEFAULT,  0), \
 LINE(TITLE_BLUR,   "",                 COLOR_WHITE,    COLOR_BLUE,     0), \
 LINE(TITLE_FOCUS,  "",                 COLOR_WHITE,    COLOR_BLUE,     A_BOLD), \
-LINE(MAIN_AUTHOR,  "",                 COLOR_GREEN,    COLOR_DEFAULT,  0), \
 LINE(MAIN_COMMIT,  "",                 COLOR_DEFAULT,  COLOR_DEFAULT,  0), \
 LINE(MAIN_TAG,     "",                 COLOR_MAGENTA,  COLOR_DEFAULT,  A_BOLD), \
 LINE(MAIN_LOCAL_TAG,"",                        COLOR_MAGENTA,  COLOR_DEFAULT,  0), \
@@ -923,7 +947,8 @@ LINE(MAIN_TRACKED, "",                      COLOR_YELLOW,   COLOR_DEFAULT,  A_BOLD), \
 LINE(MAIN_REF,     "",                 COLOR_CYAN,     COLOR_DEFAULT,  0), \
 LINE(MAIN_HEAD,    "",                 COLOR_CYAN,     COLOR_DEFAULT,  A_BOLD), \
 LINE(MAIN_REVGRAPH,"",                 COLOR_MAGENTA,  COLOR_DEFAULT,  0), \
-LINE(TREE_DIR,     "",                 COLOR_DEFAULT,  COLOR_DEFAULT,  A_NORMAL), \
+LINE(TREE_HEAD,    "",                 COLOR_DEFAULT,  COLOR_DEFAULT,  A_BOLD), \
+LINE(TREE_DIR,     "",                 COLOR_YELLOW,   COLOR_DEFAULT,  A_NORMAL), \
 LINE(TREE_FILE,    "",                 COLOR_DEFAULT,  COLOR_DEFAULT,  A_NORMAL), \
 LINE(STAT_HEAD,    "",                 COLOR_YELLOW,   COLOR_DEFAULT,  0), \
 LINE(STAT_SECTION, "",                 COLOR_CYAN,     COLOR_DEFAULT,  0), \
@@ -1071,6 +1096,8 @@ static struct keybinding default_keybindings[] = {
        { '-',          REQ_MOVE_PAGE_UP },
 
        /* Scrolling */
+       { KEY_LEFT,     REQ_SCROLL_LEFT },
+       { KEY_RIGHT,    REQ_SCROLL_RIGHT },
        { KEY_IC,       REQ_SCROLL_LINE_UP },
        { KEY_DC,       REQ_SCROLL_LINE_DOWN },
        { 'w',          REQ_SCROLL_PAGE_UP },
@@ -1097,11 +1124,8 @@ static struct keybinding default_keybindings[] = {
        { '!',          REQ_STATUS_REVERT },
        { 'M',          REQ_STATUS_MERGE },
        { '@',          REQ_STAGE_NEXT },
-       { ',',          REQ_TREE_PARENT },
+       { ',',          REQ_PARENT },
        { 'e',          REQ_EDIT },
-
-       /* Using the ncurses SIGWINCH handler. */
-       { KEY_RESIZE,   REQ_SCREEN_RESIZE },
 };
 
 #define KEYMAP_INFO \
@@ -1123,14 +1147,13 @@ enum keymap {
 #undef KEYMAP_
 };
 
-static struct int_map keymap_table[] = {
-#define KEYMAP_(name) { #name, STRING_SIZE(#name), KEYMAP_##name }
+static struct enum_map keymap_table[] = {
+#define KEYMAP_(name) ENUM_MAP(#name, KEYMAP_##name)
        KEYMAP_INFO
 #undef KEYMAP_
 };
 
-#define set_keymap(map, name) \
-       set_from_int_map(keymap_table, ARRAY_SIZE(keymap_table), map, name, strlen(name))
+#define set_keymap(map, name) map_enum(map, keymap_table, name)
 
 struct keybinding_table {
        struct keybinding *data;
@@ -1341,8 +1364,8 @@ add_builtin_run_requests(void)
  * User config file handling.
  */
 
-static struct int_map color_map[] = {
-#define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
+static struct enum_map color_map[] = {
+#define COLOR_MAP(name) ENUM_MAP(#name, COLOR_##name)
        COLOR_MAP(DEFAULT),
        COLOR_MAP(BLACK),
        COLOR_MAP(BLUE),
@@ -1354,11 +1377,8 @@ static struct int_map color_map[] = {
        COLOR_MAP(YELLOW),
 };
 
-#define set_color(color, name) \
-       set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
-
-static struct int_map attr_map[] = {
-#define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
+static struct enum_map attr_map[] = {
+#define ATTR_MAP(name) ENUM_MAP(#name, A_##name)
        ATTR_MAP(NORMAL),
        ATTR_MAP(BLINK),
        ATTR_MAP(BOLD),
@@ -1368,14 +1388,33 @@ static struct int_map attr_map[] = {
        ATTR_MAP(UNDERLINE),
 };
 
-#define set_attribute(attr, name) \
-       set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
+#define set_attribute(attr, name)      map_enum(attr, attr_map, name)
+
+static int
+parse_int(int *opt, const char *arg, int min, int max)
+{
+       int value = atoi(arg);
+
+       if (min <= value && value <= max)
+               *opt = value;
+       return OK;
+}
+
+static bool
+set_color(int *color, const char *name)
+{
+       if (map_enum(color, color_map, name))
+               return TRUE;
+       if (!prefixcmp(name, "color"))
+               return parse_int(color, name + 5, 0, 255) == OK;
+       return FALSE;
+}
 
 static int   config_lineno;
 static bool  config_errors;
 static const char *config_msg;
 
-/* Wants: object fgcolor bgcolor [attr] */
+/* Wants: object fgcolor bgcolor [attribute] */
 static int
 option_color_command(int argc, const char *argv[])
 {
@@ -1388,25 +1427,27 @@ option_color_command(int argc, const char *argv[])
 
        info = get_line_info(argv[0]);
        if (!info) {
-               if (!string_enum_compare(argv[0], "main-delim", strlen("main-delim"))) {
-                       info = get_line_info("delimiter");
-
-               } else if (!string_enum_compare(argv[0], "main-date", strlen("main-date"))) {
-                       info = get_line_info("date");
+               static struct enum_map obsolete[] = {
+                       ENUM_MAP("main-delim",  LINE_DELIMITER),
+                       ENUM_MAP("main-date",   LINE_DATE),
+                       ENUM_MAP("main-author", LINE_AUTHOR),
+               };
+               int index;
 
-               } else {
+               if (!map_enum(&index, obsolete, argv[0])) {
                        config_msg = "Unknown color name";
                        return ERR;
                }
+               info = &line_info[index];
        }
 
-       if (set_color(&info->fg, argv[1]) == ERR ||
-           set_color(&info->bg, argv[2]) == ERR) {
+       if (!set_color(&info->fg, argv[1]) ||
+           !set_color(&info->bg, argv[2])) {
                config_msg = "Unknown color";
                return ERR;
        }
 
-       if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
+       if (argc == 4 && !set_attribute(&info->attr, argv[3])) {
                config_msg = "Unknown attribute";
                return ERR;
        }
@@ -1414,18 +1455,30 @@ option_color_command(int argc, const char *argv[])
        return OK;
 }
 
-static bool parse_bool(const char *s)
+static int parse_bool(bool *opt, const char *arg)
 {
-       return (!strcmp(s, "1") || !strcmp(s, "true") ||
-               !strcmp(s, "yes")) ? TRUE : FALSE;
+       *opt = (!strcmp(arg, "1") || !strcmp(arg, "true") || !strcmp(arg, "yes"))
+               ? TRUE : FALSE;
+       return OK;
 }
 
 static int
-parse_int(const char *s, int default_value, int min, int max)
+parse_string(char *opt, const char *arg, size_t optsize)
 {
-       int value = atoi(s);
+       int arglen = strlen(arg);
 
-       return (value < min || value > max) ? default_value : value;
+       switch (arg[0]) {
+       case '\"':
+       case '\'':
+               if (arglen == 1 || arg[arglen - 1] != arg[0]) {
+                       config_msg = "Unmatched quotation";
+                       return ERR;
+               }
+               arg += 1; arglen -= 2;
+       default:
+               string_ncopy_do(opt, optsize, arg, strlen(arg));
+               return OK;
+       }
 }
 
 /* Wants: name = value */
@@ -1442,68 +1495,35 @@ option_set_command(int argc, const char *argv[])
                return ERR;
        }
 
-       if (!strcmp(argv[0], "show-author")) {
-               opt_author = parse_bool(argv[2]);
-               return OK;
-       }
-
-       if (!strcmp(argv[0], "show-date")) {
-               opt_date = parse_bool(argv[2]);
-               return OK;
-       }
+       if (!strcmp(argv[0], "show-author"))
+               return parse_bool(&opt_author, argv[2]);
 
-       if (!strcmp(argv[0], "show-rev-graph")) {
-               opt_rev_graph = parse_bool(argv[2]);
-               return OK;
-       }
+       if (!strcmp(argv[0], "show-date"))
+               return parse_bool(&opt_date, argv[2]);
 
-       if (!strcmp(argv[0], "show-refs")) {
-               opt_show_refs = parse_bool(argv[2]);
-               return OK;
-       }
+       if (!strcmp(argv[0], "show-rev-graph"))
+               return parse_bool(&opt_rev_graph, argv[2]);
 
-       if (!strcmp(argv[0], "show-line-numbers")) {
-               opt_line_number = parse_bool(argv[2]);
-               return OK;
-       }
+       if (!strcmp(argv[0], "show-refs"))
+               return parse_bool(&opt_show_refs, argv[2]);
 
-       if (!strcmp(argv[0], "line-graphics")) {
-               opt_line_graphics = parse_bool(argv[2]);
-               return OK;
-       }
+       if (!strcmp(argv[0], "show-line-numbers"))
+               return parse_bool(&opt_line_number, argv[2]);
 
-       if (!strcmp(argv[0], "line-number-interval")) {
-               opt_num_interval = parse_int(argv[2], opt_num_interval, 1, 1024);
-               return OK;
-       }
+       if (!strcmp(argv[0], "line-graphics"))
+               return parse_bool(&opt_line_graphics, argv[2]);
 
-       if (!strcmp(argv[0], "author-width")) {
-               opt_author_cols = parse_int(argv[2], opt_author_cols, 0, 1024);
-               return OK;
-       }
+       if (!strcmp(argv[0], "line-number-interval"))
+               return parse_int(&opt_num_interval, argv[2], 1, 1024);
 
-       if (!strcmp(argv[0], "tab-size")) {
-               opt_tab_size = parse_int(argv[2], opt_tab_size, 1, 1024);
-               return OK;
-       }
+       if (!strcmp(argv[0], "author-width"))
+               return parse_int(&opt_author_cols, argv[2], 0, 1024);
 
-       if (!strcmp(argv[0], "commit-encoding")) {
-               const char *arg = argv[2];
-               int arglen = strlen(arg);
+       if (!strcmp(argv[0], "tab-size"))
+               return parse_int(&opt_tab_size, argv[2], 1, 1024);
 
-               switch (arg[0]) {
-               case '"':
-               case '\'':
-                       if (arglen == 1 || arg[arglen - 1] != arg[0]) {
-                               config_msg = "Unmatched quotation";
-                               return ERR;
-                       }
-                       arg += 1; arglen -= 2;
-               default:
-                       string_ncopy(opt_encoding, arg, strlen(arg));
-                       return OK;
-               }
-       }
+       if (!strcmp(argv[0], "commit-encoding"))
+               return parse_string(opt_encoding, argv[2], sizeof(opt_encoding));
 
        config_msg = "Unknown variable name";
        return ERR;
@@ -1535,16 +1555,18 @@ option_bind_command(int argc, const char *argv[])
 
        request = get_request(argv[2]);
        if (request == REQ_NONE) {
-               const char *obsolete[] = { "cherry-pick" };
-               size_t namelen = strlen(argv[2]);
-               int i;
+               static struct enum_map obsolete[] = {
+                       ENUM_MAP("cherry-pick",         REQ_NONE),
+                       ENUM_MAP("screen-resize",       REQ_NONE),
+                       ENUM_MAP("tree-parent",         REQ_PARENT),
+               };
+               int alias;
 
-               for (i = 0; i < ARRAY_SIZE(obsolete); i++) {
-                       if (namelen == strlen(obsolete[i]) &&
-                           !string_enum_compare(obsolete[i], argv[2], namelen)) {
-                               config_msg = "Obsolete request name";
-                               return ERR;
-                       }
+               if (map_enum(&alias, obsolete, argv[2])) {
+                       if (alias != REQ_NONE)
+                               add_keybinding(keymap, alias, key);
+                       config_msg = "Obsolete request name";
+                       return ERR;
                }
        }
        if (request == REQ_NONE && *argv[2]++ == '!')
@@ -1614,8 +1636,8 @@ read_option(char *opt, size_t optlen, char *value, size_t valuelen)
        }
 
        if (status == ERR) {
-               fprintf(stderr, "Error on line %d, near '%.*s': %s\n",
-                       config_lineno, (int) optlen, opt, config_msg);
+               warn("Error on line %d, near '%.*s': %s",
+                    config_lineno, (int) optlen, opt, config_msg);
                config_errors = TRUE;
        }
 
@@ -1628,16 +1650,16 @@ load_option_file(const char *path)
 {
        struct io io = {};
 
-       /* It's ok that the file doesn't exist. */
+       /* It's OK that the file doesn't exist. */
        if (!io_open(&io, path))
                return;
 
        config_lineno = 0;
        config_errors = FALSE;
 
-       if (read_properties(&io, " \t", read_option) == ERR ||
+       if (io_load(&io, " \t", read_option) == ERR ||
            config_errors == TRUE)
-               fprintf(stderr, "Errors while loading %s.\n", path);
+               warn("Errors while loading %s.", path);
 }
 
 static int
@@ -1650,11 +1672,8 @@ load_options(void)
 
        add_builtin_run_requests();
 
-       if (!tigrc_system) {
-               if (!string_format(buf, "%s/tigrc", SYSCONFDIR))
-                       return ERR;
-               tigrc_system = buf;
-       }
+       if (!tigrc_system)
+               tigrc_system = SYSCONFDIR "/tigrc";
        load_option_file(tigrc_system);
 
        if (!tigrc_user) {
@@ -1679,9 +1698,6 @@ struct view_ops;
 static struct view *display[2];
 static unsigned int current_view;
 
-/* Reading from the prompt? */
-static bool input_mode = FALSE;
-
 #define foreach_displayed_view(view, i) \
        for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
 
@@ -1711,11 +1727,16 @@ struct view {
 
        /* Navigation */
        unsigned long offset;   /* Offset of the window top */
+       unsigned long yoffset;  /* Offset from the window side. */
        unsigned long lineno;   /* Current line number */
+       unsigned long p_offset; /* Previous offset of the window top */
+       unsigned long p_yoffset;/* Previous offset from the window side */
+       unsigned long p_lineno; /* Previous current line number */
+       bool p_restore;         /* Should the previous position be restored. */
 
        /* Searching */
        char grep[SIZEOF_STR];  /* Search string */
-       regex_t *regex;         /* Pre-compiled regex */
+       regex_t *regex;         /* Pre-compiled regexp */
 
        /* If non-NULL, points to the view that opened this view. If this view
         * is closed tig will switch back to the parent view. */
@@ -1731,6 +1752,8 @@ struct view {
        struct line *curline;   /* Line currently being drawn. */
        enum line_type curtype; /* Attribute currently used for drawing. */
        unsigned long col;      /* Column when drawing. */
+       bool has_scrolled;      /* View was scrolled. */
+       bool can_hscroll;       /* View can be scrolled horizontally. */
 
        /* Loading */
        struct io io;
@@ -1752,7 +1775,7 @@ struct view_ops {
        bool (*draw)(struct view *view, struct line *line, unsigned int lineno);
        /* Depending on view handle a special requests. */
        enum request (*request)(struct view *view, enum request request, struct line *line);
-       /* Search for regex in a line. */
+       /* Search for regexp in a line. */
        bool (*grep)(struct view *view, struct line *line);
        /* Select line */
        void (*select)(struct view *view, struct line *line);
@@ -1824,12 +1847,13 @@ draw_chars(struct view *view, enum line_type type, const char *string,
        int len = 0;
        int col = 0;
        int trimmed = FALSE;
+       size_t skip = view->yoffset > view->col ? view->yoffset - view->col : 0;
 
        if (max_len <= 0)
                return 0;
 
        if (opt_utf8) {
-               len = utf8_length(string, &col, max_len, &trimmed, use_tilde);
+               len = utf8_length(&string, skip, &col, max_len, &trimmed, use_tilde);
        } else {
                col = len = strlen(string);
                if (len > max_len) {
@@ -1842,13 +1866,17 @@ draw_chars(struct view *view, enum line_type type, const char *string,
        }
 
        set_view_attr(view, type);
-       waddnstr(view->win, string, len);
+       if (len > 0)
+               waddnstr(view->win, string, len);
        if (trimmed && use_tilde) {
                set_view_attr(view, LINE_DELIMITER);
                waddch(view->win, '~');
                col++;
        }
 
+       if (view->col + col >= view->width + view->yoffset)
+               view->can_hscroll = TRUE;
+
        return col;
 }
 
@@ -1873,6 +1901,7 @@ draw_space(struct view *view, enum line_type type, int max, int spaces)
 static bool
 draw_lineno(struct view *view, unsigned int lineno)
 {
+       size_t skip = view->yoffset > view->col ? view->yoffset - view->col : 0;
        char number[10];
        int digits3 = view->digits < 3 ? 3 : view->digits;
        int max_number = MIN(digits3, STRING_SIZE(number));
@@ -1896,29 +1925,31 @@ draw_lineno(struct view *view, unsigned int lineno)
                col = draw_space(view, LINE_LINE_NUMBER, max_number, max_number);
        }
 
-       if (col < max) {
+       if (col < max && skip <= col) {
                set_view_attr(view, LINE_DEFAULT);
                waddch(view->win, line_graphics[LINE_GRAPHIC_VLINE]);
-               col++;
        }
+       col++;
 
-       if (col < max)
-               col += draw_space(view, LINE_DEFAULT, max - col, 1);
        view->col += col;
+       if (col < max && skip <= col)
+               col = draw_space(view, LINE_DEFAULT, max - col, 1);
+       view->col++;
 
-       return view->width - view->col <= 0;
+       return view->width + view->yoffset <= view->col;
 }
 
 static bool
 draw_text(struct view *view, enum line_type type, const char *string, bool trim)
 {
-       view->col += draw_chars(view, type, string, view->width - view->col, trim);
+       view->col += draw_chars(view, type, string, view->width + view->yoffset - view->col, trim);
        return view->width - view->col <= 0;
 }
 
 static bool
 draw_graphic(struct view *view, enum line_type type, chtype graphic[], size_t size)
 {
+       size_t skip = view->yoffset > view->col ? view->yoffset - view->col : 0;
        int max = view->width - view->col;
        int i;
 
@@ -1928,14 +1959,13 @@ draw_graphic(struct view *view, enum line_type type, chtype graphic[], size_t si
        set_view_attr(view, type);
        /* Using waddch() instead of waddnstr() ensures that
         * they'll be rendered correctly for the cursor line. */
-       for (i = 0; i < size; i++)
+       for (i = skip; i < size; i++)
                waddch(view->win, graphic[i]);
 
        view->col += size;
-       if (size < max) {
+       if (size < max && skip <= size)
                waddch(view->win, ' ');
-               view->col++;
-       }
+       view->col++;
 
        return view->width - view->col <= 0;
 }
@@ -1951,8 +1981,9 @@ draw_field(struct view *view, enum line_type type, const char *text, int len, bo
        else
                col = draw_space(view, type, max - 1, max - 1);
 
-       view->col += col + draw_space(view, LINE_DEFAULT, max - col, max - col);
-       return view->width - view->col <= 0;
+       view->col += col;
+       view->col += draw_space(view, LINE_DEFAULT, max - col, max - col);
+       return view->width + view->yoffset <= view->col;
 }
 
 static bool
@@ -1969,12 +2000,58 @@ draw_date(struct view *view, struct tm *time)
        return draw_field(view, LINE_DATE, date, DATE_COLS, FALSE);
 }
 
+static bool
+draw_author(struct view *view, const char *author)
+{
+       bool trim = opt_author_cols == 0 || opt_author_cols > 5 || !author;
+
+       if (!trim) {
+               static char initials[10];
+               size_t pos;
+
+#define is_initial_sep(c) (isspace(c) || ispunct(c) || (c) == '@')
+
+               memset(initials, 0, sizeof(initials));
+               for (pos = 0; *author && pos < opt_author_cols - 1; author++, pos++) {
+                       while (is_initial_sep(*author))
+                               author++;
+                       strncpy(&initials[pos], author, sizeof(initials) - 1 - pos);
+                       while (*author && !is_initial_sep(author[1]))
+                               author++;
+               }
+
+               author = initials;
+       }
+
+       return draw_field(view, LINE_AUTHOR, author, opt_author_cols, trim);
+}
+
+static bool
+draw_mode(struct view *view, mode_t mode)
+{
+       static const char dir_mode[]    = "drwxr-xr-x";
+       static const char link_mode[]   = "lrwxrwxrwx";
+       static const char exe_mode[]    = "-rwxr-xr-x";
+       static const char file_mode[]   = "-rw-r--r--";
+       const char *str;
+
+       if (S_ISDIR(mode))
+               str = dir_mode;
+       else if (S_ISLNK(mode))
+               str = link_mode;
+       else if (mode & S_IXUSR)
+               str = exe_mode;
+       else
+               str = file_mode;
+
+       return draw_field(view, LINE_MODE, str, sizeof(file_mode), FALSE);
+}
+
 static bool
 draw_view_line(struct view *view, unsigned int lineno)
 {
        struct line *line;
        bool selected = (view->offset + lineno == view->lineno);
-       bool draw_ok;
 
        assert(view_is_displayed(view));
 
@@ -1998,11 +2075,7 @@ draw_view_line(struct view *view, unsigned int lineno)
                view->ops->select(view, line);
        }
 
-       scrollok(view->win, FALSE);
-       draw_ok = view->ops->draw(view, line, lineno);
-       scrollok(view->win, TRUE);
-
-       return draw_ok;
+       return view->ops->draw(view, line, lineno);
 }
 
 static void
@@ -2023,11 +2096,7 @@ redraw_view_dirty(struct view *view)
 
        if (!dirty)
                return;
-       redrawwin(view->win);
-       if (input_mode)
-               wnoutrefresh(view->win);
-       else
-               wrefresh(view->win);
+       wnoutrefresh(view->win);
 }
 
 static void
@@ -2035,22 +2104,21 @@ redraw_view_from(struct view *view, int lineno)
 {
        assert(0 <= lineno && lineno < view->height);
 
+       if (lineno == 0)
+               view->can_hscroll = FALSE;
+
        for (; lineno < view->height; lineno++) {
                if (!draw_view_line(view, lineno))
                        break;
        }
 
-       redrawwin(view->win);
-       if (input_mode)
-               wnoutrefresh(view->win);
-       else
-               wrefresh(view->win);
+       wnoutrefresh(view->win);
 }
 
 static void
 redraw_view(struct view *view)
 {
-       wclear(view->win);
+       werase(view->win);
        redraw_view_from(view, 0);
 }
 
@@ -2107,12 +2175,7 @@ update_view_title(struct view *view)
 
        mvwaddnstr(view->title, 0, 0, buf, bufpos);
        wclrtoeol(view->title);
-       wmove(view->title, 0, view->width - 1);
-
-       if (input_mode)
-               wnoutrefresh(view->title);
-       else
-               wrefresh(view->title);
+       wnoutrefresh(view->title);
 }
 
 static void
@@ -2150,7 +2213,7 @@ resize_display(void)
                        if (!view->win)
                                die("Failed to create %s view", view->name);
 
-                       scrollok(view->win, TRUE);
+                       scrollok(view->win, FALSE);
 
                        view->title = newwin(1, 0, offset + view->height, 0);
                        if (!view->title)
@@ -2167,35 +2230,24 @@ resize_display(void)
 }
 
 static void
-redraw_display(void)
+redraw_display(bool clear)
 {
        struct view *view;
        int i;
 
        foreach_displayed_view (view, i) {
+               if (clear)
+                       wclear(view->win);
                redraw_view(view);
                update_view_title(view);
        }
 }
 
-static void
-update_display_cursor(struct view *view)
-{
-       /* Move the cursor to the right-most column of the cursor line.
-        *
-        * XXX: This could turn out to be a bit expensive, but it ensures that
-        * the cursor does not jump around. */
-       if (view->lines) {
-               wmove(view->win, view->lineno - view->offset, view->width - 1);
-               wrefresh(view->win);
-       }
-}
-
 static void
 toggle_view_option(bool *option, const char *help)
 {
        *option = !*option;
-       redraw_display();
+       redraw_display(FALSE);
        report("%sabling %s", *option ? "En" : "Dis", help);
 }
 
@@ -2234,19 +2286,19 @@ do_scroll_view(struct view *view, int lines)
                int line = lines > 0 ? view->height - lines : 0;
                int end = line + ABS(lines);
 
+               scrollok(view->win, TRUE);
                wscrl(view->win, lines);
+               scrollok(view->win, FALSE);
 
-               for (; line < end; line++) {
-                       if (!draw_view_line(view, line))
-                               break;
-               }
+               while (line < end && draw_view_line(view, line))
+                       line++;
 
                if (redraw_current_line)
                        draw_view_line(view, view->lineno - view->offset);
+               wnoutrefresh(view->win);
        }
 
-       redrawwin(view->win);
-       wrefresh(view->win);
+       view->has_scrolled = TRUE;
        report("");
 }
 
@@ -2259,6 +2311,27 @@ scroll_view(struct view *view, enum request request)
        assert(view_is_displayed(view));
 
        switch (request) {
+       case REQ_SCROLL_LEFT:
+               if (view->yoffset == 0) {
+                       report("Cannot scroll beyond the first column");
+                       return;
+               }
+               if (view->yoffset <= SCROLL_INTERVAL)
+                       view->yoffset = 0;
+               else
+                       view->yoffset -= SCROLL_INTERVAL;
+               redraw_view_from(view, 0);
+               report("");
+               return;
+       case REQ_SCROLL_RIGHT:
+               if (!view->can_hscroll) {
+                       report("Cannot scroll beyond the last column");
+                       return;
+               }
+               view->yoffset += SCROLL_INTERVAL;
+               redraw_view(view);
+               report("");
+               return;
        case REQ_SCROLL_PAGE_DOWN:
                lines = view->height;
        case REQ_SCROLL_LINE_DOWN:
@@ -2379,8 +2452,7 @@ move_view(struct view *view, enum request request)
        /* Draw the current line */
        draw_view_line(view, view->lineno - view->offset);
 
-       redrawwin(view->win);
-       wrefresh(view->win);
+       wnoutrefresh(view->win);
        report("");
 }
 
@@ -2391,32 +2463,27 @@ move_view(struct view *view, enum request request)
 
 static void search_view(struct view *view, enum request request);
 
-static bool
-find_next_line(struct view *view, unsigned long lineno, struct line *line)
+static void
+select_view_line(struct view *view, unsigned long lineno)
 {
-       assert(view_is_displayed(view));
-
-       if (!view->ops->grep(view, line))
-               return FALSE;
-
        if (lineno - view->offset >= view->height) {
                view->offset = lineno;
                view->lineno = lineno;
-               redraw_view(view);
+               if (view_is_displayed(view))
+                       redraw_view(view);
 
        } else {
                unsigned long old_lineno = view->lineno - view->offset;
 
                view->lineno = lineno;
-               draw_view_line(view, old_lineno);
-
-               draw_view_line(view, view->lineno - view->offset);
-               redrawwin(view->win);
-               wrefresh(view->win);
+               if (view_is_displayed(view)) {
+                       draw_view_line(view, old_lineno);
+                       draw_view_line(view, view->lineno - view->offset);
+                       wnoutrefresh(view->win);
+               } else {
+                       view->ops->select(view, &view->line[view->lineno]);
+               }
        }
-
-       report("Line %ld matches '%s'", lineno + 1, view->grep);
-       return TRUE;
 }
 
 static void
@@ -2454,10 +2521,11 @@ find_next(struct view *view, enum request request)
        /* Note, lineno is unsigned long so will wrap around in which case it
         * will become bigger than view->lines. */
        for (; lineno < view->lines; lineno += direction) {
-               struct line *line = &view->line[lineno];
-
-               if (find_next_line(view, lineno, line))
+               if (view->ops->grep(view, &view->line[lineno])) {
+                       select_view_line(view, lineno);
+                       report("Line %ld matches '%s'", lineno + 1, view->grep);
                        return;
+               }
        }
 
        report("No match found for '%s'", view->grep);
@@ -2504,8 +2572,13 @@ reset_view(struct view *view)
                free(view->line[i].data);
        free(view->line);
 
+       view->p_offset = view->offset;
+       view->p_yoffset = view->yoffset;
+       view->p_lineno = view->lineno;
+
        view->line = NULL;
        view->offset = 0;
+       view->yoffset = 0;
        view->lines  = 0;
        view->lineno = 0;
        view->line_alloc = 0;
@@ -2585,6 +2658,44 @@ format_argv(const char *dst_argv[], const char *src_argv[], enum format_flags fl
        return src_argv[argc] == NULL;
 }
 
+static bool
+restore_view_position(struct view *view)
+{
+       if (!view->p_restore || (view->pipe && view->lines <= view->p_lineno))
+               return FALSE;
+
+       /* Changing the view position cancels the restoring. */
+       /* FIXME: Changing back to the first line is not detected. */
+       if (view->offset != 0 || view->lineno != 0) {
+               view->p_restore = FALSE;
+               return FALSE;
+       }
+
+       if (view->p_lineno >= view->lines) {
+               view->p_lineno = view->lines > 0 ? view->lines - 1 : 0;
+               if (view->p_offset >= view->p_lineno) {
+                       unsigned long half = view->height / 2;
+
+                       if (view->p_lineno > half)
+                               view->p_offset = view->p_lineno - half;
+                       else
+                               view->p_offset = 0;
+               }
+       }
+
+       if (view_is_displayed(view) &&
+           view->offset != view->p_offset &&
+           view->lineno != view->p_lineno)
+               werase(view->win);
+
+       view->offset = view->p_offset;
+       view->yoffset = view->p_yoffset;
+       view->lineno = view->p_lineno;
+       view->p_restore = FALSE;
+
+       return TRUE;
+}
+
 static void
 end_update(struct view *view, bool force)
 {
@@ -2703,7 +2814,7 @@ update_view(struct view *view)
                if (view->lines == 0) {
                        time_t secs = time(NULL) - view->start_time;
 
-                       if (secs > view->update_secs) {
+                       if (secs > 1 && secs > view->update_secs) {
                                if (view->update_secs == 0)
                                        redraw_view(view);
                                update_view_title(view);
@@ -2728,8 +2839,11 @@ update_view(struct view *view)
                                line = out_buffer;
                }
 
-               if (!view->ops->read(view, line))
-                       goto alloc_error;
+               if (!view->ops->read(view, line)) {
+                       report("Allocation failure");
+                       end_update(view, TRUE);
+                       return FALSE;
+               }
        }
 
        {
@@ -2756,6 +2870,9 @@ update_view(struct view *view)
                end_update(view, FALSE);
        }
 
+       if (restore_view_position(view))
+               redraw = TRUE;
+
        if (!view_is_displayed(view))
                return TRUE;
 
@@ -2768,11 +2885,6 @@ update_view(struct view *view)
         * commit reference in view->ref it'll be available here. */
        update_view_title(view);
        return TRUE;
-
-alloc_error:
-       report("Allocation failure");
-       end_update(view, TRUE);
-       return FALSE;
 }
 
 static struct line *
@@ -2821,9 +2933,7 @@ add_line_format(struct view *view, enum line_type type, const char *fmt, ...)
 enum open_flags {
        OPEN_DEFAULT = 0,       /* Use default view switching. */
        OPEN_SPLIT = 1,         /* Split current view. */
-       OPEN_BACKGROUNDED = 2,  /* Backgrounded. */
        OPEN_RELOAD = 4,        /* Reload view even if it is the current. */
-       OPEN_NOMAXIMIZE = 8,    /* Do not maximize the current view. */
        OPEN_REFRESH = 16,      /* Refresh view using previous command. */
        OPEN_PREPARED = 32,     /* Open already prepared command. */
 };
@@ -2831,10 +2941,9 @@ enum open_flags {
 static void
 open_view(struct view *prev, enum request request, enum open_flags flags)
 {
-       bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
        bool split = !!(flags & OPEN_SPLIT);
        bool reload = !!(flags & (OPEN_RELOAD | OPEN_REFRESH | OPEN_PREPARED));
-       bool nomaximize = !!(flags & (OPEN_NOMAXIMIZE | OPEN_REFRESH));
+       bool nomaximize = !!(flags & OPEN_REFRESH);
        struct view *view = VIEW(request);
        int nviews = displayed_views();
        struct view *base_view = display[0];
@@ -2851,8 +2960,7 @@ open_view(struct view *prev, enum request request, enum open_flags flags)
 
        if (split) {
                display[1] = view;
-               if (!backgrounded)
-                       current_view = 1;
+               current_view = 1;
        } else if (!nomaximize) {
                /* Maximize the current view. */
                memset(display, 0, sizeof(display));
@@ -2867,10 +2975,13 @@ open_view(struct view *prev, enum request request, enum open_flags flags)
                resize_display();
 
        if (view->ops->open) {
+               if (view->pipe)
+                       end_update(view, TRUE);
                if (!view->ops->open(view)) {
                        report("Failed to load %s view", view->name);
                        return;
                }
+               restore_view_position(view);
 
        } else if ((reload || strcmp(view->vid, view->id)) &&
                   !begin_update(view, flags & (OPEN_REFRESH | OPEN_PREPARED))) {
@@ -2888,7 +2999,7 @@ open_view(struct view *prev, enum request request, enum open_flags flags)
        }
 
        if (prev && view != prev) {
-               if (split && !backgrounded) {
+               if (split) {
                        /* "Blur" the previous view. */
                        update_view_title(prev);
                }
@@ -2900,16 +3011,12 @@ open_view(struct view *prev, enum request request, enum open_flags flags)
                /* Clear the old view and let the incremental updating refill
                 * the screen. */
                werase(view->win);
+               view->p_restore = flags & (OPEN_RELOAD | OPEN_REFRESH);
                report("");
        } else if (view_is_displayed(view)) {
                redraw_view(view);
                report("");
        }
-
-       /* If the view is backgrounded the above calls to report()
-        * won't redraw the view title. */
-       if (backgrounded)
-               update_view_title(view);
 }
 
 static void
@@ -2921,7 +3028,7 @@ open_external_viewer(const char *argv[], const char *dir)
        fprintf(stderr, "Press Enter to continue");
        getc(opt_tty);
        reset_prog_mode();
-       redraw_display();
+       redraw_display(TRUE);
 }
 
 static void
@@ -3010,6 +3117,8 @@ view_driver(struct view *view, enum request request)
                move_view(view, request);
                break;
 
+       case REQ_SCROLL_LEFT:
+       case REQ_SCROLL_RIGHT:
        case REQ_SCROLL_LINE_DOWN:
        case REQ_SCROLL_LINE_UP:
        case REQ_SCROLL_PAGE_DOWN:
@@ -3165,11 +3274,8 @@ view_driver(struct view *view, enum request request)
                report("tig-%s (built %s)", TIG_VERSION, __DATE__);
                return TRUE;
 
-       case REQ_SCREEN_RESIZE:
-               resize_display();
-               /* Fall-through */
        case REQ_SCREEN_REDRAW:
-               redraw_display();
+               redraw_display(TRUE);
                break;
 
        case REQ_EDIT:
@@ -3191,7 +3297,7 @@ view_driver(struct view *view, enum request request)
                        display[current_view] = view->parent;
                        view->parent = view;
                        resize_display();
-                       redraw_display();
+                       redraw_display(FALSE);
                        report("");
                        break;
                }
@@ -3208,6 +3314,114 @@ view_driver(struct view *view, enum request request)
 }
 
 
+/*
+ * View backend utilities
+ */
+
+static void
+parse_timezone(time_t *time, const char *zone)
+{
+       long tz;
+
+       tz  = ('0' - zone[1]) * 60 * 60 * 10;
+       tz += ('0' - zone[2]) * 60 * 60;
+       tz += ('0' - zone[3]) * 60;
+       tz += ('0' - zone[4]);
+
+       if (zone[0] == '-')
+               tz = -tz;
+
+       *time -= tz;
+}
+
+/* Parse author lines where the name may be empty:
+ *     author  <email@address.tld> 1138474660 +0100
+ */
+static void
+parse_author_line(char *ident, char *author, size_t authorsize, struct tm *tm)
+{
+       char *nameend = strchr(ident, '<');
+       char *emailend = strchr(ident, '>');
+
+       if (nameend && emailend)
+               *nameend = *emailend = 0;
+       ident = chomp_string(ident);
+       if (!*ident) {
+               if (nameend)
+                       ident = chomp_string(nameend + 1);
+               if (!*ident)
+                       ident = "Unknown";
+       }
+
+       string_ncopy_do(author, authorsize, ident, strlen(ident));
+
+       /* Parse epoch and timezone */
+       if (emailend && emailend[1] == ' ') {
+               char *secs = emailend + 2;
+               char *zone = strchr(secs, ' ');
+               time_t time = (time_t) atol(secs);
+
+               if (zone && strlen(zone) == STRING_SIZE(" +0700"))
+                       parse_timezone(&time, zone + 1);
+
+               gmtime_r(&time, tm);
+       }
+}
+
+static enum input_status
+select_commit_parent_handler(void *data, char *buf, int c)
+{
+       size_t parents = *(size_t *) data;
+       int parent = 0;
+
+       if (!isdigit(c))
+               return INPUT_SKIP;
+
+       if (*buf)
+               parent = atoi(buf) * 10;
+       parent += c - '0';
+
+       if (parent > parents)
+               return INPUT_SKIP;
+       return INPUT_OK;
+}
+
+static bool
+select_commit_parent(const char *id, char rev[SIZEOF_REV])
+{
+       char buf[SIZEOF_STR * 4];
+       const char *revlist_argv[] = {
+               "git", "rev-list", "-1", "--parents", id, NULL
+       };
+       int parents;
+
+       if (!run_io_buf(revlist_argv, buf, sizeof(buf)) ||
+           !*chomp_string(buf) ||
+           (parents = (strlen(buf) / 40) - 1) < 0) {
+               report("Failed to get parent information");
+               return FALSE;
+
+       } else if (parents == 0) {
+               report("The selected commit has no parents");
+               return FALSE;
+       }
+
+       if (parents > 1) {
+               char prompt[SIZEOF_STR];
+               char *result;
+
+               if (!string_format(prompt, "Which parent? [1..%d] ", parents))
+                       return FALSE;
+               result = prompt_input(prompt, select_commit_parent_handler, &parents);
+               if (!result)
+                       return FALSE;
+               parents = atoi(result);
+       }
+
+       string_copy_rev(rev, &buf[41 * parents]);
+       return TRUE;
+}
+
 /*
  * Pager backend
  */
@@ -3215,11 +3429,12 @@ view_driver(struct view *view, enum request request)
 static bool
 pager_draw(struct view *view, struct line *line, unsigned int lineno)
 {
-       char *text = line->data;
+       char text[SIZEOF_STR];
 
        if (opt_line_number && draw_lineno(view, lineno))
                return TRUE;
 
+       string_expand(text, sizeof(text), line->data, opt_tab_size);
        draw_text(view, line->type, text, TRUE);
        return TRUE;
 }
@@ -3426,22 +3641,13 @@ static struct view_ops diff_ops = {
 static bool
 help_open(struct view *view)
 {
-       int lines = ARRAY_SIZE(req_info) + 2;
+       char buf[SIZEOF_STR];
+       size_t bufpos;
        int i;
 
        if (view->lines > 0)
                return TRUE;
 
-       for (i = 0; i < ARRAY_SIZE(req_info); i++)
-               if (!req_info[i].request)
-                       lines++;
-
-       lines += run_requests + 1;
-
-       view->line = calloc(lines, sizeof(*view->line));
-       if (!view->line)
-               return FALSE;
-
        add_line_text(view, "Quick reference for tig keybindings:", LINE_DEFAULT);
 
        for (i = 0; i < ARRAY_SIZE(req_info); i++) {
@@ -3460,8 +3666,14 @@ help_open(struct view *view)
                if (!*key)
                        key = "(no key defined)";
 
-               add_line_format(view, LINE_DEFAULT, "    %-25s %s",
-                               key, req_info[i].help);
+               for (bufpos = 0; bufpos <= req_info[i].namelen; bufpos++) {
+                       buf[bufpos] = tolower(req_info[i].name[bufpos]);
+                       if (buf[bufpos] == '_')
+                               buf[bufpos] = '-';
+               }
+
+               add_line_format(view, LINE_DEFAULT, "    %-25s %-20s %s",
+                               key, buf, req_info[i].help);
        }
 
        if (run_requests) {
@@ -3472,8 +3684,6 @@ help_open(struct view *view)
        for (i = 0; i < run_requests; i++) {
                struct run_request *req = get_run_request(REQ_NONE + i + 1);
                const char *key;
-               char cmd[SIZEOF_STR];
-               size_t bufpos;
                int argc;
 
                if (!req)
@@ -3484,12 +3694,12 @@ help_open(struct view *view)
                        key = "(no key defined)";
 
                for (bufpos = 0, argc = 0; req->argv[argc]; argc++)
-                       if (!string_format_from(cmd, &bufpos, "%s%s",
+                       if (!string_format_from(buf, &bufpos, "%s%s",
                                                argc ? " " : "", req->argv[argc]))
                                return REQ_NONE;
 
                add_line_format(view, LINE_DEFAULT, "    %-10s %-14s `%s`",
-                               keymap_table[req->keymap].name, key, cmd);
+                               keymap_table[req->keymap].name, key, buf);
        }
 
        return TRUE;
@@ -3557,25 +3767,33 @@ push_tree_stack_entry(const char *name, unsigned long lineno)
 
 /* Parse output from git-ls-tree(1):
  *
- * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26        Makefile
- * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6        README
  * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657        tig.c
- * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38        web.conf
  */
 
 #define SIZEOF_TREE_ATTR \
-       STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
+       STRING_SIZE("100644 blob f931e1d229c3e185caad4449bf5b66ed72462657\t")
+
+#define SIZEOF_TREE_MODE \
+       STRING_SIZE("100644 ")
 
-#define TREE_UP_FORMAT "040000 tree %s\t.."
+#define TREE_ID_OFFSET \
+       STRING_SIZE("100644 blob ")
+
+struct tree_entry {
+       char id[SIZEOF_REV];
+       mode_t mode;
+       struct tm time;                 /* Date from the author ident. */
+       char author[75];                /* Author of the commit. */
+       char name[1];
+};
 
 static const char *
 tree_path(struct line *line)
 {
-       const char *path = line->data;
-
-       return path + SIZEOF_TREE_ATTR;
+       return ((struct tree_entry *) line->data)->name;
 }
 
+
 static int
 tree_compare_entry(struct line *line1, struct line *line2)
 {
@@ -3584,30 +3802,126 @@ tree_compare_entry(struct line *line1, struct line *line2)
        return strcmp(tree_path(line1), tree_path(line2));
 }
 
+static struct line *
+tree_entry(struct view *view, enum line_type type, const char *path,
+          const char *mode, const char *id)
+{
+       struct tree_entry *entry = calloc(1, sizeof(*entry) + strlen(path));
+       struct line *line = entry ? add_line_data(view, entry, type) : NULL;
+
+       if (!entry || !line) {
+               free(entry);
+               return NULL;
+       }
+
+       strncpy(entry->name, path, strlen(path));
+       if (mode)
+               entry->mode = strtoul(mode, NULL, 8);
+       if (id)
+               string_copy_rev(entry->id, id);
+
+       return line;
+}
+
+static bool
+tree_read_date(struct view *view, char *text, bool *read_date)
+{
+       static char author_name[SIZEOF_STR];
+       static struct tm author_time;
+
+       if (!text && *read_date) {
+               *read_date = FALSE;
+               return TRUE;
+
+       } else if (!text) {
+               char *path = *opt_path ? opt_path : ".";
+               /* Find next entry to process */
+               const char *log_file[] = {
+                       "git", "log", "--no-color", "--pretty=raw",
+                               "--cc", "--raw", view->id, "--", path, NULL
+               };
+               struct io io = {};
+
+               if (!view->lines) {
+                       tree_entry(view, LINE_TREE_HEAD, opt_path, NULL, NULL);
+                       report("Tree is empty");
+                       return TRUE;
+               }
+
+               if (!run_io_rd(&io, log_file, FORMAT_NONE)) {
+                       report("Failed to load tree data");
+                       return TRUE;
+               }
+
+               done_io(view->pipe);
+               view->io = io;
+               *read_date = TRUE;
+               return FALSE;
+
+       } else if (*text == 'a' && get_line_type(text) == LINE_AUTHOR) {
+               parse_author_line(text + STRING_SIZE("author "),
+                                 author_name, sizeof(author_name), &author_time);
+
+       } else if (*text == ':') {
+               char *pos;
+               size_t annotated = 1;
+               size_t i;
+
+               pos = strchr(text, '\t');
+               if (!pos)
+                       return TRUE;
+               text = pos + 1;
+               if (*opt_prefix && !strncmp(text, opt_prefix, strlen(opt_prefix)))
+                       text += strlen(opt_prefix);
+               if (*opt_path && !strncmp(text, opt_path, strlen(opt_path)))
+                       text += strlen(opt_path);
+               pos = strchr(text, '/');
+               if (pos)
+                       *pos = 0;
+
+               for (i = 1; i < view->lines; i++) {
+                       struct line *line = &view->line[i];
+                       struct tree_entry *entry = line->data;
+
+                       annotated += !!*entry->author;
+                       if (*entry->author || strcmp(entry->name, text))
+                               continue;
+
+                       string_copy(entry->author, author_name);
+                       memcpy(&entry->time, &author_time, sizeof(entry->time));
+                       line->dirty = 1;
+                       break;
+               }
+
+               if (annotated == view->lines)
+                       kill_io(view->pipe);
+       }
+       return TRUE;
+}
+
 static bool
 tree_read(struct view *view, char *text)
 {
-       size_t textlen = text ? strlen(text) : 0;
+       static bool read_date = FALSE;
+       struct tree_entry *data;
        struct line *entry, *line;
        enum line_type type;
+       size_t textlen = text ? strlen(text) : 0;
+       char *path = text + SIZEOF_TREE_ATTR;
+
+       if (read_date || !text)
+               return tree_read_date(view, text, &read_date);
 
-       if (!text)
-               return TRUE;
        if (textlen <= SIZEOF_TREE_ATTR)
                return FALSE;
-
-       type = text[STRING_SIZE("100644 ")] == 't'
-            ? LINE_TREE_DIR : LINE_TREE_FILE;
-
        if (view->lines == 0 &&
-           !add_line_format(view, LINE_DEFAULT, "Directory path /%s", opt_path))
+           !tree_entry(view, LINE_TREE_HEAD, opt_path, NULL, NULL))
                return FALSE;
 
        /* Strip the path part ... */
        if (*opt_path) {
                size_t pathlen = textlen - SIZEOF_TREE_ATTR;
                size_t striplen = strlen(opt_path);
-               char *path = text + SIZEOF_TREE_ATTR;
 
                if (pathlen > striplen)
                        memmove(path, path + striplen,
@@ -3615,14 +3929,15 @@ tree_read(struct view *view, char *text)
 
                /* Insert "link" to parent directory. */
                if (view->lines == 1 &&
-                   !add_line_format(view, LINE_TREE_DIR, TREE_UP_FORMAT, view->ref))
+                   !tree_entry(view, LINE_TREE_DIR, "..", "040000", view->ref))
                        return FALSE;
        }
 
-       entry = add_line_text(view, text, type);
+       type = text[SIZEOF_TREE_MODE] == 't' ? LINE_TREE_DIR : LINE_TREE_FILE;
+       entry = tree_entry(view, type, path, text, text + TREE_ID_OFFSET);
        if (!entry)
                return FALSE;
-       text = entry->data;
+       data = entry->data;
 
        /* Skip "Directory ..." and ".." line. */
        for (line = &view->line[1 + !!*opt_path]; line < entry; line++) {
@@ -3631,7 +3946,7 @@ tree_read(struct view *view, char *text)
 
                memmove(line + 1, line, (entry - line) * sizeof(*entry));
 
-               line->data = text;
+               line->data = data;
                line->type = type;
                for (; line <= entry; line++)
                        line->dirty = line->cleareol = 1;
@@ -3646,6 +3961,45 @@ tree_read(struct view *view, char *text)
        return TRUE;
 }
 
+static bool
+tree_draw(struct view *view, struct line *line, unsigned int lineno)
+{
+       struct tree_entry *entry = line->data;
+
+       if (line->type == LINE_TREE_HEAD) {
+               if (draw_text(view, line->type, "Directory path /", TRUE))
+                       return TRUE;
+       } else {
+               if (draw_mode(view, entry->mode))
+                       return TRUE;
+
+               if (opt_author && draw_author(view, entry->author))
+                       return TRUE;
+
+               if (opt_date && draw_date(view, *entry->author ? &entry->time : NULL))
+                       return TRUE;
+       }
+       if (draw_text(view, line->type, entry->name, TRUE))
+               return TRUE;
+       return TRUE;
+}
+
+static void
+open_blob_editor()
+{
+       char file[SIZEOF_STR] = "/tmp/tigblob.XXXXXX";
+       int fd = mkstemp(file);
+
+       if (fd == -1)
+               report("Failed to create temporary file");
+       else if (!run_io_append(blob_ops.argv, FORMAT_ALL, fd))
+               report("Failed to save blob data to file");
+       else
+               open_editor(FALSE, file);
+       if (fd != -1)
+               unlink(file);
+}
+
 static enum request
 tree_request(struct view *view, enum request request, struct line *line)
 {
@@ -3665,13 +4019,13 @@ tree_request(struct view *view, enum request request, struct line *line)
                if (line->type != LINE_TREE_FILE) {
                        report("Edit only supported for files");
                } else if (!is_head_commit(view->vid)) {
-                       report("Edit only supported for files in the current work tree");
+                       open_blob_editor();
                } else {
                        open_editor(TRUE, opt_file);
                }
                return REQ_NONE;
 
-       case REQ_TREE_PARENT:
+       case REQ_PARENT:
                if (!*opt_path) {
                        /* quit view if at top of tree */
                        return REQ_VIEW_CLOSE;
@@ -3693,7 +4047,7 @@ tree_request(struct view *view, enum request request, struct line *line)
 
        switch (line->type) {
        case LINE_TREE_DIR:
-               /* Depending on whether it is a subdir or parent (updir?) link
+               /* Depending on whether it is a subdirectory or parent link
                 * mangle the path buffer. */
                if (line == &view->line[1] && *opt_path) {
                        pop_tree_stack_entry();
@@ -3716,13 +4070,12 @@ tree_request(struct view *view, enum request request, struct line *line)
                break;
 
        default:
-               return TRUE;
+               return REQ_NONE;
        }
 
        open_view(view, request, flags);
-       if (request == REQ_VIEW_TREE) {
+       if (request == REQ_VIEW_TREE)
                view->lineno = tree_lineno;
-       }
 
        return REQ_NONE;
 }
@@ -3730,17 +4083,17 @@ tree_request(struct view *view, enum request request, struct line *line)
 static void
 tree_select(struct view *view, struct line *line)
 {
-       char *text = (char *)line->data + STRING_SIZE("100644 blob ");
+       struct tree_entry *entry = line->data;
 
        if (line->type == LINE_TREE_FILE) {
-               string_copy_rev(ref_blob, text);
+               string_copy_rev(ref_blob, entry->id);
                string_format(opt_file, "%s%s", opt_path, tree_path(line));
 
        } else if (line->type != LINE_TREE_DIR) {
                return;
        }
 
-       string_copy_rev(view->ref, text);
+       string_copy_rev(view->ref, entry->id);
 }
 
 static const char *tree_argv[SIZEOF_ARG] = {
@@ -3752,7 +4105,7 @@ static struct view_ops tree_ops = {
        tree_argv,
        NULL,
        tree_read,
-       pager_draw,
+       tree_draw,
        tree_request,
        pager_grep,
        tree_select,
@@ -3766,6 +4119,18 @@ blob_read(struct view *view, char *line)
        return add_line_text(view, line, LINE_DEFAULT) != NULL;
 }
 
+static enum request
+blob_request(struct view *view, enum request request, struct line *line)
+{
+       switch (request) {
+       case REQ_EDIT:
+               open_blob_editor();
+               return REQ_NONE;
+       default:
+               return pager_request(view, request, line);
+       }
+}
+
 static const char *blob_argv[SIZEOF_ARG] = {
        "git", "cat-file", "blob", "%(blob)", NULL
 };
@@ -3776,7 +4141,7 @@ static struct view_ops blob_ops = {
        NULL,
        blob_read,
        pager_draw,
-       pager_request,
+       blob_request,
        pager_grep,
        pager_select,
 };
@@ -3810,6 +4175,7 @@ struct blame_commit {
        char author[75];                /* Author of the commit. */
        struct tm time;                 /* Date from the author ident. */
        char filename[128];             /* Name of file. */
+       bool has_previous;              /* Was a "previous" line detected. */
 };
 
 struct blame {
@@ -3925,12 +4291,14 @@ blame_read_file(struct view *view, const char *line, bool *read_file)
                return FALSE;
 
        } else {
-               size_t linelen = strlen(line);
+               size_t linelen = string_expand_length(line, opt_tab_size);
                struct blame *blame = malloc(sizeof(*blame) + linelen);
 
+               if (!blame)
+                       return FALSE;
+
                blame->commit = NULL;
-               strncpy(blame->text, line, linelen);
-               blame->text[linelen] = 0;
+               string_expand(blame->text, linelen + 1, line, opt_tab_size);
                return add_line_data(view, blame, LINE_BLAME_ID) != NULL;
        }
 }
@@ -3974,7 +4342,7 @@ blame_read(struct view *view, char *line)
        if (!commit) {
                commit = parse_blame_commit(view, line, &blamed);
                string_format(view->ref, "%s %2d%%", view->vid,
-                             blamed * 100 / view->lines);
+                             view->lines ? blamed * 100 / view->lines : 0);
 
        } else if (match_blame_header("author ", &line)) {
                string_ncopy(commit->author, line, strlen(line));
@@ -3983,22 +4351,15 @@ blame_read(struct view *view, char *line)
                author_time = (time_t) atol(line);
 
        } else if (match_blame_header("author-tz ", &line)) {
-               long tz;
-
-               tz  = ('0' - line[1]) * 60 * 60 * 10;
-               tz += ('0' - line[2]) * 60 * 60;
-               tz += ('0' - line[3]) * 60;
-               tz += ('0' - line[4]) * 60;
-
-               if (line[0] == '-')
-                       tz = -tz;
-
-               author_time -= tz;
+               parse_timezone(&author_time, line);
                gmtime_r(&author_time, &commit->time);
 
        } else if (match_blame_header("summary ", &line)) {
                string_ncopy(commit->title, line, strlen(line));
 
+       } else if (match_blame_header("previous ", &line)) {
+               commit->has_previous = TRUE;
+
        } else if (match_blame_header("filename ", &line)) {
                string_ncopy(commit->filename, line, strlen(line));
                commit = NULL;
@@ -4023,8 +4384,7 @@ blame_draw(struct view *view, struct line *line, unsigned int lineno)
        if (opt_date && draw_date(view, time))
                return TRUE;
 
-       if (opt_author &&
-           draw_field(view, LINE_MAIN_AUTHOR, author, opt_author_cols, TRUE))
+       if (opt_author && draw_author(view, author))
                return TRUE;
 
        if (draw_field(view, LINE_BLAME_ID, id, ID_COLS, FALSE))
@@ -4063,6 +4423,12 @@ blame_request(struct view *view, enum request request, struct line *line)
                }
                break;
 
+       case REQ_PARENT:
+               if (check_blame_commit(blame) &&
+                   select_commit_parent(blame->commit->id, opt_ref))
+                       open_view(view, REQ_VIEW_BLAME, OPEN_REFRESH);
+               break;
+
        case REQ_ENTER:
                if (!blame->commit) {
                        report("No commit loaded yet");
@@ -4076,11 +4442,17 @@ blame_request(struct view *view, enum request request, struct line *line)
                if (!strcmp(blame->commit->id, NULL_ID)) {
                        struct view *diff = VIEW(REQ_VIEW_DIFF);
                        const char *diff_index_argv[] = {
-                               "git", "diff-index", "--root", "--cached",
-                                       "--patch-with-stat", "-C", "-M",
-                                       "HEAD", "--", view->vid, NULL
+                               "git", "diff-index", "--root", "--patch-with-stat",
+                                       "-C", "-M", "HEAD", "--", view->vid, NULL
                        };
 
+                       if (!blame->commit->has_previous) {
+                               diff_index_argv[1] = "diff";
+                               diff_index_argv[2] = "--no-color";
+                               diff_index_argv[6] = "--";
+                               diff_index_argv[7] = "/dev/null";
+                       }
+
                        if (!prepare_update(diff, diff_index_argv, NULL, FORMAT_DASH)) {
                                report("Failed to allocate diff command");
                                break;
@@ -4089,6 +4461,8 @@ blame_request(struct view *view, enum request request, struct line *line)
                }
 
                open_view(view, REQ_VIEW_DIFF, flags);
+               if (VIEW(REQ_VIEW_DIFF)->pipe && !strcmp(blame->commit->id, NULL_ID))
+                       string_copy_rev(VIEW(REQ_VIEW_DIFF)->ref, NULL_ID);
                break;
 
        default:
@@ -4219,7 +4593,6 @@ status_get_diff(struct status *file, const char *buf, size_t bufsize)
 static bool
 status_run(struct view *view, const char *argv[], char status, enum line_type type)
 {
-       struct status *file = NULL;
        struct status *unmerged = NULL;
        char *buf;
        struct io io = {};
@@ -4230,6 +4603,8 @@ status_run(struct view *view, const char *argv[], char status, enum line_type ty
        add_line_data(view, NULL, type);
 
        while ((buf = io_get(&io, 0, TRUE))) {
+               struct status *file = unmerged;
+
                if (!file) {
                        file = calloc(1, sizeof(*file));
                        if (!file || !add_line_data(view, file, type))
@@ -4242,7 +4617,7 @@ status_run(struct view *view, const char *argv[], char status, enum line_type ty
                        if (status == 'A')
                                string_copy(file->old.rev, NULL_ID);
 
-               } else if (!file->status) {
+               } else if (!file->status || file == unmerged) {
                        if (!status_get_diff(file, buf, strlen(buf)))
                                goto error_out;
 
@@ -4250,22 +4625,15 @@ status_run(struct view *view, const char *argv[], char status, enum line_type ty
                        if (!buf)
                                break;
 
-                       /* Collapse all 'M'odified entries that follow a
-                        * associated 'U'nmerged entry. */
-                       if (file->status == 'U') {
+                       /* Collapse all modified entries that follow an
+                        * associated unmerged entry. */
+                       if (unmerged == file) {
+                               unmerged->status = 'U';
+                               unmerged = NULL;
+                       } else if (file->status == 'U') {
                                unmerged = file;
-
-                       } else if (unmerged) {
-                               int collapse = !strcmp(buf, unmerged->new.name);
-
-                               unmerged = NULL;
-                               if (collapse) {
-                                       free(file);
-                                       view->lines--;
-                                       continue;
-                               }
-                       }
-               }
+                       }
+               }
 
                /* Grab the old name for rename/copy. */
                if (!*file->old.name &&
@@ -4321,23 +4689,91 @@ static const char *update_index_argv[] = {
        "git", "update-index", "-q", "--unmerged", "--refresh", NULL
 };
 
+/* Restore the previous line number to stay in the context or select a
+ * line with something that can be updated. */
+static void
+status_restore(struct view *view)
+{
+       if (view->p_lineno >= view->lines)
+               view->p_lineno = view->lines - 1;
+       while (view->p_lineno < view->lines && !view->line[view->p_lineno].data)
+               view->p_lineno++;
+       while (view->p_lineno > 0 && !view->line[view->p_lineno].data)
+               view->p_lineno--;
+
+       /* If the above fails, always skip the "On branch" line. */
+       if (view->p_lineno < view->lines)
+               view->lineno = view->p_lineno;
+       else
+               view->lineno = 1;
+
+       if (view->lineno < view->offset)
+               view->offset = view->lineno;
+       else if (view->offset + view->height <= view->lineno)
+               view->offset = view->lineno - view->height + 1;
+
+       view->p_restore = FALSE;
+}
+
+static void
+status_update_onbranch(void)
+{
+       static const char *paths[][2] = {
+               { "rebase-apply/rebasing",      "Rebasing" },
+               { "rebase-apply/applying",      "Applying mailbox" },
+               { "rebase-apply/",              "Rebasing mailbox" },
+               { "rebase-merge/interactive",   "Interactive rebase" },
+               { "rebase-merge/",              "Rebase merge" },
+               { "MERGE_HEAD",                 "Merging" },
+               { "BISECT_LOG",                 "Bisecting" },
+               { "HEAD",                       "On branch" },
+       };
+       char buf[SIZEOF_STR];
+       struct stat stat;
+       int i;
+
+       if (is_initial_commit()) {
+               string_copy(status_onbranch, "Initial commit");
+               return;
+       }
+
+       for (i = 0; i < ARRAY_SIZE(paths); i++) {
+               char *head = opt_head;
+
+               if (!string_format(buf, "%s/%s", opt_git_dir, paths[i][0]) ||
+                   lstat(buf, &stat) < 0)
+                       continue;
+
+               if (!*opt_head) {
+                       struct io io = {};
+
+                       if (string_format(buf, "%s/rebase-merge/head-name", opt_git_dir) &&
+                           io_open(&io, buf) &&
+                           io_read_buf(&io, buf, sizeof(buf))) {
+                               head = chomp_string(buf);
+                               if (!prefixcmp(head, "refs/heads/"))
+                                       head += STRING_SIZE("refs/heads/");
+                       }
+               }
+
+               if (!string_format(status_onbranch, "%s %s", paths[i][1], head))
+                       string_copy(status_onbranch, opt_head);
+               return;
+       }
+
+       string_copy(status_onbranch, "Not currently on any branch");
+}
+
 /* First parse staged info using git-diff-index(1), then parse unstaged
  * info using git-diff-files(1), and finally untracked files using
  * git-ls-files(1). */
 static bool
 status_open(struct view *view)
 {
-       unsigned long prev_lineno = view->lineno;
-
        reset_view(view);
 
        add_line_data(view, NULL, LINE_STAT_HEAD);
-       if (is_initial_commit())
-               string_copy(status_onbranch, "Initial commit");
-       else if (!*opt_head)
-               string_copy(status_onbranch, "Not currently on any branch");
-       else if (!string_format(status_onbranch, "On branch %s", opt_head))
-               return FALSE;
+       status_update_onbranch();
 
        run_io_bg(update_index_argv);
 
@@ -4352,27 +4788,10 @@ status_open(struct view *view)
            !status_run(view, status_list_other_argv, '?', LINE_STAT_UNTRACKED))
                return FALSE;
 
-       /* If all went well restore the previous line number to stay in
-        * the context or select a line with something that can be
-        * updated. */
-       if (prev_lineno >= view->lines)
-               prev_lineno = view->lines - 1;
-       while (prev_lineno < view->lines && !view->line[prev_lineno].data)
-               prev_lineno++;
-       while (prev_lineno > 0 && !view->line[prev_lineno].data)
-               prev_lineno--;
-
-       /* If the above fails, always skip the "On branch" line. */
-       if (prev_lineno < view->lines)
-               view->lineno = prev_lineno;
-       else
-               view->lineno = 1;
-
-       if (view->lineno < view->offset)
-               view->offset = view->lineno;
-       else if (view->offset + view->height <= view->lineno)
-               view->offset = view->lineno - view->height + 1;
-
+       /* Restore the exact position or use the specialized restore
+        * mode? */
+       if (!view->p_restore)
+               status_restore(view);
        return TRUE;
 }
 
@@ -4402,7 +4821,7 @@ status_draw(struct view *view, struct line *line, unsigned int lineno)
 
                case LINE_STAT_NONE:
                        type = LINE_DEFAULT;
-                       text = "    (no files)";
+                       text = "  (no files)";
                        break;
 
                case LINE_STAT_HEAD:
@@ -4511,7 +4930,7 @@ status_enter(struct view *view, struct line *line)
        }
 
        split = view_is_displayed(view) ? OPEN_SPLIT : 0;
-       open_view(view, REQ_VIEW_STAGE, OPEN_REFRESH | split);
+       open_view(view, REQ_VIEW_STAGE, OPEN_PREPARED | split);
        if (view_is_displayed(VIEW(REQ_VIEW_STAGE))) {
                if (status) {
                        stage_status = *status;
@@ -4531,17 +4950,22 @@ static bool
 status_exists(struct status *status, enum line_type type)
 {
        struct view *view = VIEW(REQ_VIEW_STATUS);
-       struct line *line;
+       unsigned long lineno;
 
-       for (line = view->line; line < view->line + view->lines; line++) {
+       for (lineno = 0; lineno < view->lines; lineno++) {
+               struct line *line = &view->line[lineno];
                struct status *pos = line->data;
 
                if (line->type != type)
                        continue;
-               if (!pos && (!status || !status->status))
+               if (!pos && (!status || !status->status) && line[1].data) {
+                       select_view_line(view, lineno);
                        return TRUE;
-               if (pos && !strcmp(status->new.name, pos->new.name))
+               }
+               if (pos && !strcmp(status->new.name, pos->new.name)) {
+                       select_view_line(view, lineno);
                        return TRUE;
+               }
        }
 
        return FALSE;
@@ -4690,13 +5114,20 @@ status_revert(struct status *status, enum line_type type, bool has_none)
                return FALSE;
 
        } else {
+               char mode[10] = "100644";
+               const char *reset_argv[] = {
+                       "git", "update-index", "--cacheinfo", mode,
+                               status->old.rev, status->old.name, NULL
+               };
                const char *checkout_argv[] = {
                        "git", "checkout", "--", status->old.name, NULL
                };
 
                if (!prompt_yesno("Are you sure you want to overwrite any changes?"))
                        return FALSE;
-               return run_io_fg(checkout_argv, opt_cdup);
+               string_format(mode, "%o", status->old.mode);
+               return (status->status != 'U' || run_io_fg(reset_argv, opt_cdup)) &&
+                       run_io_fg(checkout_argv, opt_cdup);
        }
 }
 
@@ -5059,12 +5490,15 @@ stage_request(struct view *view, enum request request, struct line *line)
                return request;
        }
 
-       open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD | OPEN_NOMAXIMIZE);
+       VIEW(REQ_VIEW_STATUS)->p_restore = TRUE;
+       open_view(view, REQ_VIEW_STATUS, OPEN_REFRESH);
 
        /* Check whether the staged entry still exists, and close the
         * stage view if it doesn't. */
-       if (!status_exists(&stage_status, stage_line_type))
+       if (!status_exists(&stage_status, stage_line_type)) {
+               status_restore(VIEW(REQ_VIEW_STATUS));
                return REQ_VIEW_CLOSE;
+       }
 
        if (stage_line_type == LINE_STAT_UNTRACKED) {
                if (!suffixcmp(stage_status.new.name, -1, "/")) {
@@ -5334,8 +5768,7 @@ main_draw(struct view *view, struct line *line, unsigned int lineno)
        if (opt_date && draw_date(view, &commit->time))
                return TRUE;
 
-       if (opt_author &&
-           draw_field(view, LINE_MAIN_AUTHOR, commit->author, opt_author_cols, TRUE))
+       if (opt_author && draw_author(view, commit->author))
                return TRUE;
 
        if (opt_rev_graph && commit->graph_size &&
@@ -5441,56 +5874,13 @@ main_read(struct view *view, char *line)
                break;
 
        case LINE_AUTHOR:
-       {
-               /* Parse author lines where the name may be empty:
-                *      author  <email@address.tld> 1138474660 +0100
-                */
-               char *ident = line + STRING_SIZE("author ");
-               char *nameend = strchr(ident, '<');
-               char *emailend = strchr(ident, '>');
-
-               if (!nameend || !emailend)
-                       break;
-
+               parse_author_line(line + STRING_SIZE("author "),
+                                 commit->author, sizeof(commit->author),
+                                 &commit->time);
                update_rev_graph(view, graph);
                graph = graph->next;
-
-               *nameend = *emailend = 0;
-               ident = chomp_string(ident);
-               if (!*ident) {
-                       ident = chomp_string(nameend + 1);
-                       if (!*ident)
-                               ident = "Unknown";
-               }
-
-               string_ncopy(commit->author, ident, strlen(ident));
-               view->line[view->lines - 1].dirty = 1;
-
-               /* Parse epoch and timezone */
-               if (emailend[1] == ' ') {
-                       char *secs = emailend + 2;
-                       char *zone = strchr(secs, ' ');
-                       time_t time = (time_t) atol(secs);
-
-                       if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
-                               long tz;
-
-                               zone++;
-                               tz  = ('0' - zone[1]) * 60 * 60 * 10;
-                               tz += ('0' - zone[2]) * 60 * 60;
-                               tz += ('0' - zone[3]) * 60;
-                               tz += ('0' - zone[4]) * 60;
-
-                               if (zone[0] == '-')
-                                       tz = -tz;
-
-                               time -= tz;
-                       }
-
-                       gmtime_r(&time, &commit->time);
-               }
                break;
-       }
+
        default:
                /* Fill in the commit title if it has not already been set. */
                if (commit->title[0])
@@ -5510,7 +5900,7 @@ main_read(struct view *view, char *line)
                /* FIXME: More graceful handling of titles; append "..." to
                 * shortened titles, etc. */
 
-               string_ncopy(commit->title, line, strlen(line));
+               string_expand(commit->title, sizeof(commit->title), line, 1);
                view->line[view->lines - 1].dirty = 1;
        }
 
@@ -5619,15 +6009,11 @@ static struct view_ops main_ops = {
 /*
  * Unicode / UTF-8 handling
  *
- * NOTE: Much of the following code for dealing with unicode is derived from
+ * NOTE: Much of the following code for dealing with Unicode is derived from
  * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
- * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
+ * src/intl/charset.c from the UTF-8 branch commit elinks-0.11.0-g31f2c28.
  */
 
-/* I've (over)annotated a lot of code snippets because I am not entirely
- * confident that the approach taken by this small UTF-8 interface is correct.
- * --jonas */
-
 static inline int
 unicode_width(unsigned long c)
 {
@@ -5665,7 +6051,7 @@ static const unsigned char utf8_bytes[256] = {
        3,3,3,3,3,3,3,3, 3,3,3,3,3,3,3,3, 4,4,4,4,4,4,4,4, 5,5,5,5,6,6,1,1,
 };
 
-/* Decode UTF-8 multi-byte representation into a unicode character. */
+/* Decode UTF-8 multi-byte representation into a Unicode character. */
 static inline unsigned long
 utf8_to_unicode(const char *string, size_t length)
 {
@@ -5706,7 +6092,7 @@ utf8_to_unicode(const char *string, size_t length)
                unicode +=  (string[5] & 0x3f);
                break;
        default:
-               die("Invalid unicode length");
+               die("Invalid Unicode length");
        }
 
        /* Invalid characters could return the special 0xfffd value but NUL
@@ -5721,9 +6107,9 @@ utf8_to_unicode(const char *string, size_t length)
  *
  * Returns the number of bytes to output from string to satisfy max_width. */
 static size_t
-utf8_length(const char *string, int *width, size_t max_width, int *trimmed, bool reserve)
+utf8_length(const char **start, size_t skip, int *width, size_t max_width, int *trimmed, bool reserve)
 {
-       const char *start = string;
+       const char *string = *start;
        const char *end = strchr(string, '\0');
        unsigned char last_bytes = 0;
        size_t last_ucwidth = 0;
@@ -5744,11 +6130,15 @@ utf8_length(const char *string, int *width, size_t max_width, int *trimmed, bool
                 * it is a single- or double-width character. */
 
                unicode = utf8_to_unicode(string, bytes);
-               /* FIXME: Graceful handling of invalid unicode character. */
+               /* FIXME: Graceful handling of invalid Unicode character. */
                if (!unicode)
                        break;
 
                ucwidth = unicode_width(unicode);
+               if (skip > 0) {
+                       skip -= ucwidth <= skip ? ucwidth : skip;
+                       *start += bytes;
+               }
                *width  += ucwidth;
                if (*width > max_width) {
                        *trimmed = 1;
@@ -5761,11 +6151,11 @@ utf8_length(const char *string, int *width, size_t max_width, int *trimmed, bool
                }
 
                string  += bytes;
-               last_bytes = bytes;
+               last_bytes = ucwidth ? bytes : 0;
                last_ucwidth = ucwidth;
        }
 
-       return string - start;
+       return string - *start;
 }
 
 
@@ -5776,10 +6166,17 @@ utf8_length(const char *string, int *width, size_t max_width, int *trimmed, bool
 /* Whether or not the curses interface has been initialized. */
 static bool cursed = FALSE;
 
+/* Terminal hacks and workarounds. */
+static bool use_scroll_redrawwin;
+static bool use_scroll_status_wclear;
+
 /* The status window is used for polling keystrokes. */
 static WINDOW *status_win;
 
-static bool status_empty = TRUE;
+/* Reading from the prompt? */
+static bool input_mode = FALSE;
+
+static bool status_empty = FALSE;
 
 /* Update status and title window. */
 static void
@@ -5811,6 +6208,8 @@ report(const char *msg, ...)
                va_start(args, msg);
 
                wmove(status_win, 0, 0);
+               if (view->has_scrolled && use_scroll_status_wclear)
+                       wclear(status_win);
                if (*msg) {
                        vwprintw(status_win, msg, args);
                        status_empty = FALSE;
@@ -5818,13 +6217,12 @@ report(const char *msg, ...)
                        status_empty = TRUE;
                }
                wclrtoeol(status_win);
-               wrefresh(status_win);
+               wnoutrefresh(status_win);
 
                va_end(args);
        }
 
        update_view_title(view);
-       update_display_cursor(view);
 }
 
 /* Controls when nodelay should be in effect when polling user input. */
@@ -5841,6 +6239,7 @@ set_nonblocking_input(bool loading)
 static void
 init_display(void)
 {
+       const char *term;
        int x, y;
 
        /* Initialize the curses library */
@@ -5858,10 +6257,10 @@ init_display(void)
        if (!cursed)
                die("Failed to initialize curses");
 
-       nonl();         /* Tell curses not to do NL->CR/NL on output */
+       nonl();         /* Disable conversion and detect newlines from input. */
        cbreak();       /* Take input chars one at a time, no wait for \n */
        noecho();       /* Don't echo input */
-       leaveok(stdscr, TRUE);
+       leaveok(stdscr, FALSE);
 
        if (has_colors())
                init_colors();
@@ -5879,102 +6278,117 @@ init_display(void)
        if (opt_line_graphics) {
                line_graphics[LINE_GRAPHIC_VLINE] = ACS_VLINE;
        }
+
+       term = getenv("XTERM_VERSION") ? NULL : getenv("COLORTERM");
+       if (term && !strcmp(term, "gnome-terminal")) {
+               /* In the gnome-terminal-emulator, the message from
+                * scrolling up one line when impossible followed by
+                * scrolling down one line causes corruption of the
+                * status line. This is fixed by calling wclear. */
+               use_scroll_status_wclear = TRUE;
+               use_scroll_redrawwin = FALSE;
+
+       } else if (term && !strcmp(term, "xrvt-xpm")) {
+               /* No problems with full optimizations in xrvt-(unicode)
+                * and aterm. */
+               use_scroll_status_wclear = use_scroll_redrawwin = FALSE;
+
+       } else {
+               /* When scrolling in (u)xterm the last line in the
+                * scrolling direction will update slowly. */
+               use_scroll_redrawwin = TRUE;
+               use_scroll_status_wclear = FALSE;
+       }
 }
 
-static bool
-prompt_yesno(const char *prompt)
+static int
+get_input(int prompt_position)
 {
-       enum { WAIT, STOP, CANCEL  } status = WAIT;
-       bool answer = FALSE;
-
-       while (status == WAIT) {
-               struct view *view;
-               int i, key;
+       struct view *view;
+       int i, key, cursor_y, cursor_x;
 
+       if (prompt_position)
                input_mode = TRUE;
 
-               foreach_view (view, i)
+       while (TRUE) {
+               foreach_view (view, i) {
                        update_view(view);
+                       if (view_is_displayed(view) && view->has_scrolled &&
+                           use_scroll_redrawwin)
+                               redrawwin(view->win);
+                       view->has_scrolled = FALSE;
+               }
 
-               input_mode = FALSE;
-
-               mvwprintw(status_win, 0, 0, "%s [Yy]/[Nn]", prompt);
-               wclrtoeol(status_win);
+               /* Update the cursor position. */
+               if (prompt_position) {
+                       getbegyx(status_win, cursor_y, cursor_x);
+                       cursor_x = prompt_position;
+               } else {
+                       view = display[current_view];
+                       getbegyx(view->win, cursor_y, cursor_x);
+                       cursor_x = view->width - 1;
+                       cursor_y += view->lineno - view->offset;
+               }
+               setsyx(cursor_y, cursor_x);
 
                /* Refresh, accept single keystroke of input */
+               doupdate();
                key = wgetch(status_win);
-               switch (key) {
-               case ERR:
-                       break;
 
-               case 'y':
-               case 'Y':
-                       answer = TRUE;
-                       status = STOP;
-                       break;
+               /* wgetch() with nodelay() enabled returns ERR when
+                * there's no input. */
+               if (key == ERR) {
 
-               case KEY_ESC:
-               case KEY_RETURN:
-               case KEY_ENTER:
-               case KEY_BACKSPACE:
-               case 'n':
-               case 'N':
-               case '\n':
-               default:
-                       answer = FALSE;
-                       status = CANCEL;
-               }
-       }
+               } else if (key == KEY_RESIZE) {
+                       int height, width;
 
-       /* Clear the status window */
-       status_empty = FALSE;
-       report("");
+                       getmaxyx(stdscr, height, width);
 
-       return answer;
+                       wresize(status_win, 1, width);
+                       mvwin(status_win, height - 1, 0);
+                       wnoutrefresh(status_win);
+                       resize_display();
+                       redraw_display(TRUE);
+
+               } else {
+                       input_mode = FALSE;
+                       return key;
+               }
+       }
 }
 
 static char *
-read_prompt(const char *prompt)
+prompt_input(const char *prompt, input_handler handler, void *data)
 {
-       enum { READING, STOP, CANCEL } status = READING;
+       enum input_status status = INPUT_OK;
        static char buf[SIZEOF_STR];
-       int pos = 0;
-
-       while (status == READING) {
-               struct view *view;
-               int i, key;
-
-               input_mode = TRUE;
+       size_t pos = 0;
 
-               foreach_view (view, i)
-                       update_view(view);
+       buf[pos] = 0;
 
-               input_mode = FALSE;
+       while (status == INPUT_OK || status == INPUT_SKIP) {
+               int key;
 
                mvwprintw(status_win, 0, 0, "%s%.*s", prompt, pos, buf);
                wclrtoeol(status_win);
 
-               /* Refresh, accept single keystroke of input */
-               key = wgetch(status_win);
+               key = get_input(pos + 1);
                switch (key) {
                case KEY_RETURN:
                case KEY_ENTER:
                case '\n':
-                       status = pos ? STOP : CANCEL;
+                       status = pos ? INPUT_STOP : INPUT_CANCEL;
                        break;
 
                case KEY_BACKSPACE:
                        if (pos > 0)
-                               pos--;
+                               buf[--pos] = 0;
                        else
-                               status = CANCEL;
+                               status = INPUT_CANCEL;
                        break;
 
                case KEY_ESC:
-                       status = CANCEL;
-                       break;
-
-               case ERR:
+                       status = INPUT_CANCEL;
                        break;
 
                default:
@@ -5983,7 +6397,8 @@ read_prompt(const char *prompt)
                                return NULL;
                        }
 
-                       if (isprint(key))
+                       status = handler(data, buf, key);
+                       if (status == INPUT_OK)
                                buf[pos++] = (char) key;
                }
        }
@@ -5992,7 +6407,7 @@ read_prompt(const char *prompt)
        status_empty = FALSE;
        report("");
 
-       if (status == CANCEL)
+       if (status == INPUT_CANCEL)
                return NULL;
 
        buf[pos++] = 0;
@@ -6000,21 +6415,43 @@ read_prompt(const char *prompt)
        return buf;
 }
 
-/*
- * Repository properties
- */
+static enum input_status
+prompt_yesno_handler(void *data, char *buf, int c)
+{
+       if (c == 'y' || c == 'Y')
+               return INPUT_STOP;
+       if (c == 'n' || c == 'N')
+               return INPUT_CANCEL;
+       return INPUT_SKIP;
+}
 
-static int
-git_properties(const char **argv, const char *separators,
-              int (*read_property)(char *, size_t, char *, size_t))
+static bool
+prompt_yesno(const char *prompt)
 {
-       struct io io = {};
+       char prompt2[SIZEOF_STR];
 
-       if (init_io_rd(&io, argv, NULL, FORMAT_NONE))
-               return read_properties(&io, separators, read_property);
-       return ERR;
+       if (!string_format(prompt2, "%s [Yy/Nn]", prompt))
+               return FALSE;
+
+       return !!prompt_input(prompt2, prompt_yesno_handler, NULL);
 }
 
+static enum input_status
+read_prompt_handler(void *data, char *buf, int c)
+{
+       return isprint(c) ? INPUT_OK : INPUT_SKIP;
+}
+
+static char *
+read_prompt(const char *prompt)
+{
+       return prompt_input(prompt, read_prompt_handler, NULL);
+}
+
+/*
+ * Repository properties
+ */
+
 static struct ref *refs = NULL;
 static size_t refs_alloc = 0;
 static size_t refs_size = 0;
@@ -6138,7 +6575,7 @@ read_ref(char *id, size_t idlen, char *name, size_t namelen)
        }
 
        if (check_replace && !strcmp(name, refs[refs_size - 1].name)) {
-               /* it's an annotated tag, replace the previous sha1 with the
+               /* it's an annotated tag, replace the previous SHA1 with the
                 * resolved commit id; relies on the fact git-ls-remote lists
                 * the commit id of an annotated tag right before the commit id
                 * it points to. */
@@ -6189,7 +6626,23 @@ load_refs(void)
        while (id_refs_size > 0)
                free(id_refs[--id_refs_size]);
 
-       return git_properties(ls_remote_argv, "\t", read_ref);
+       return run_io_load(ls_remote_argv, "\t", read_ref);
+}
+
+static void
+set_repo_config_option(char *name, char *value, int (*cmd)(int, const char **))
+{
+       const char *argv[SIZEOF_ARG] = { name, "=" };
+       int argc = 1 + (cmd == option_set_command);
+       int error = ERR;
+
+       if (!argv_from_string(argv, &argc, value))
+               config_msg = "Too many option arguments";
+       else
+               error = cmd(argc, argv);
+
+       if (error == ERR)
+               warn("Option 'tig.%s': %s", name, config_msg);
 }
 
 static int
@@ -6201,6 +6654,15 @@ read_repo_config_option(char *name, size_t namelen, char *value, size_t valuelen
        if (!strcmp(name, "core.editor"))
                string_ncopy(opt_editor, value, valuelen);
 
+       if (!prefixcmp(name, "tig.color."))
+               set_repo_config_option(name + 10, value, option_color_command);
+
+       else if (!prefixcmp(name, "tig.bind."))
+               set_repo_config_option(name + 9, value, option_bind_command);
+
+       else if (!prefixcmp(name, "tig."))
+               set_repo_config_option(name + 4, value, option_set_command);
+
        /* branch.<head>.remote */
        if (*opt_head &&
            !strncmp(name, "branch.", 7) &&
@@ -6231,7 +6693,7 @@ load_git_config(void)
 {
        const char *config_list_argv[] = { "git", GIT_CONFIG, "--list", NULL };
 
-       return git_properties(config_list_argv, "=", read_repo_config_option);
+       return run_io_load(config_list_argv, "=", read_repo_config_option);
 }
 
 static int
@@ -6247,8 +6709,12 @@ read_repo_info(char *name, size_t namelen, char *value, size_t valuelen)
                 * the option else either "true" or "false" is printed.
                 * Default to true for the unknown case. */
                opt_is_inside_work_tree = strcmp(name, "false") ? TRUE : FALSE;
-       } else {
+
+       } else if (*name == '.') {
                string_ncopy(opt_cdup, name, namelen);
+
+       } else {
+               string_ncopy(opt_prefix, name, namelen);
        }
 
        return OK;
@@ -6262,7 +6728,7 @@ load_repo_info(void)
        };
        const char *rev_parse_argv[] = {
                "git", "rev-parse", "--git-dir", "--is-inside-work-tree",
-                       "--show-cdup", NULL
+                       "--show-cdup", "--show-prefix", NULL
        };
 
        if (run_io_buf(head_argv, opt_head, sizeof(opt_head))) {
@@ -6274,45 +6740,7 @@ load_repo_info(void)
                }
        }
 
-       return git_properties(rev_parse_argv, "=", read_repo_info);
-}
-
-static int
-read_properties(struct io *io, const char *separators,
-               int (*read_property)(char *, size_t, char *, size_t))
-{
-       char *name;
-       int state = OK;
-
-       if (!start_io(io))
-               return ERR;
-
-       while (state == OK && (name = io_get(io, '\n', TRUE))) {
-               char *value;
-               size_t namelen;
-               size_t valuelen;
-
-               name = chomp_string(name);
-               namelen = strcspn(name, separators);
-
-               if (name[namelen]) {
-                       name[namelen] = 0;
-                       value = chomp_string(name + namelen + 1);
-                       valuelen = strlen(value);
-
-               } else {
-                       value = "";
-                       valuelen = 0;
-               }
-
-               state = read_property(name, namelen, value, valuelen);
-       }
-
-       if (state != ERR && io_error(io))
-               state = ERR;
-       done_io(io);
-
-       return state;
+       return run_io_load(rev_parse_argv, "=", read_repo_info);
 }
 
 
@@ -6320,6 +6748,19 @@ read_properties(struct io *io, const char *separators,
  * Main
  */
 
+static const char usage[] =
+"tig " TIG_VERSION " (" __DATE__ ")\n"
+"\n"
+"Usage: tig        [options] [revs] [--] [paths]\n"
+"   or: tig show   [options] [revs] [--] [paths]\n"
+"   or: tig blame  [rev] path\n"
+"   or: tig status\n"
+"   or: tig <      [git command output]\n"
+"\n"
+"Options:\n"
+"  -v, --version   Show version and exit\n"
+"  -h, --help      Show help message and exit";
+
 static void __NORETURN
 quit(int sig)
 {
@@ -6357,12 +6798,90 @@ warn(const char *msg, ...)
        va_end(args);
 }
 
+static enum request
+parse_options(int argc, const char *argv[])
+{
+       enum request request = REQ_VIEW_MAIN;
+       const char *subcommand;
+       bool seen_dashdash = FALSE;
+       /* XXX: This is vulnerable to the user overriding options
+        * required for the main view parser. */
+       const char *custom_argv[SIZEOF_ARG] = {
+               "git", "log", "--no-color", "--pretty=raw", "--parents",
+                       "--topo-order", NULL
+       };
+       int i, j = 6;
+
+       if (!isatty(STDIN_FILENO)) {
+               io_open(&VIEW(REQ_VIEW_PAGER)->io, "");
+               return REQ_VIEW_PAGER;
+       }
+
+       if (argc <= 1)
+               return REQ_NONE;
+
+       subcommand = argv[1];
+       if (!strcmp(subcommand, "status")) {
+               if (argc > 2)
+                       warn("ignoring arguments after `%s'", subcommand);
+               return REQ_VIEW_STATUS;
+
+       } else if (!strcmp(subcommand, "blame")) {
+               if (argc <= 2 || argc > 4)
+                       die("invalid number of options to blame\n\n%s", usage);
+
+               i = 2;
+               if (argc == 4) {
+                       string_ncopy(opt_ref, argv[i], strlen(argv[i]));
+                       i++;
+               }
+
+               string_ncopy(opt_file, argv[i], strlen(argv[i]));
+               return REQ_VIEW_BLAME;
+
+       } else if (!strcmp(subcommand, "show")) {
+               request = REQ_VIEW_DIFF;
+
+       } else {
+               subcommand = NULL;
+       }
+
+       if (subcommand) {
+               custom_argv[1] = subcommand;
+               j = 2;
+       }
+
+       for (i = 1 + !!subcommand; i < argc; i++) {
+               const char *opt = argv[i];
+
+               if (seen_dashdash || !strcmp(opt, "--")) {
+                       seen_dashdash = TRUE;
+
+               } else if (!strcmp(opt, "-v") || !strcmp(opt, "--version")) {
+                       printf("tig version %s\n", TIG_VERSION);
+                       quit(0);
+
+               } else if (!strcmp(opt, "-h") || !strcmp(opt, "--help")) {
+                       printf("%s\n", usage);
+                       quit(0);
+               }
+
+               custom_argv[j++] = opt;
+               if (j >= ARRAY_SIZE(custom_argv))
+                       die("command too long");
+       }
+
+       if (!prepare_update(VIEW(request), custom_argv, NULL, FORMAT_NONE))                                                                        
+               die("Failed to format arguments"); 
+
+       return request;
+}
+
 int
 main(int argc, const char *argv[])
 {
-       const char **run_argv = NULL;
+       enum request request = parse_options(argc, argv);
        struct view *view;
-       enum request request;
        size_t i;
 
        signal(SIGINT, quit);
@@ -6382,10 +6901,6 @@ main(int argc, const char *argv[])
        if (load_git_config() == ERR)
                die("Failed to load repo config.");
 
-       request = parse_options(argc, argv, &run_argv);
-       if (request == REQ_NONE)
-               return 0;
-
        /* Require a git repository unless when running in pager mode. */
        if (!opt_git_dir[0] && request != REQ_VIEW_PAGER)
                die("Not a git repository");
@@ -6407,33 +6922,14 @@ main(int argc, const char *argv[])
 
        init_display();
 
-       if (request == REQ_VIEW_PAGER || run_argv) {
-               if (request == REQ_VIEW_PAGER)
-                       io_open(&VIEW(request)->io, "");
-               else if (!prepare_update(VIEW(request), run_argv, NULL, FORMAT_NONE))
-                       die("Failed to format arguments");
+       if (request != REQ_NONE)
                open_view(NULL, request, OPEN_PREPARED);
-               request = REQ_NONE;
-       }
+       request = request == REQ_NONE ? REQ_VIEW_MAIN : REQ_NONE;
 
        while (view_driver(display[current_view], request)) {
-               int key;
-               int i;
+               int key = get_input(0);
 
-               foreach_view (view, i)
-                       update_view(view);
                view = display[current_view];
-
-               /* Refresh, accept single keystroke of input */
-               key = wgetch(status_win);
-
-               /* wgetch() with nodelay() enabled returns ERR when there's no
-                * input. */
-               if (key == ERR) {
-                       request = REQ_NONE;
-                       continue;
-               }
-
                request = get_keybinding(view->keymap, key);
 
                /* Some low-level request handling. This keeps access to
@@ -6473,23 +6969,14 @@ main(int argc, const char *argv[])
 
                        if (search)
                                string_ncopy(opt_search, search, strlen(search));
+                       else if (*opt_search)
+                               request = request == REQ_SEARCH ?
+                                       REQ_FIND_NEXT :
+                                       REQ_FIND_PREV;
                        else
                                request = REQ_NONE;
                        break;
                }
-               case REQ_SCREEN_RESIZE:
-               {
-                       int height, width;
-
-                       getmaxyx(stdscr, height, width);
-
-                       /* Resize the status view and let the view driver take
-                        * care of resizing the displayed views. */
-                       wresize(status_win, 1, width);
-                       mvwin(status_win, height - 1, 0);
-                       wrefresh(status_win);
-                       break;
-               }
                default:
                        break;
                }