gitweb: Split JavaScript for maintability, combining on build

Split originally single gitweb.js file into smaller files, each
dealing with single issue / area of responsibility.  This move should
make gitweb's JavaScript code easier to maintain.

For better webapp performance it is recommended[1][2][3] to combine
JavaScript files.  Do it during build time (in gitweb/Makefile), by
straight concatenation of files into gitweb.js file (which is now
ignored as being generated).  This means that there are no changes to
gitweb script itself - it still uses gitweb.js or gitweb.min.js, but
now generated.

[1]: http://developer.yahoo.com/performance/rules.html
     "Minimize HTTP Requests" section
[2]: http://code.google.com/speed/articles/include-scripts-properly.html
     "1. Combine external JavaScript files"
[3]: http://javascript-reference.info/speed-up-your-javascript-load-time.htm
     "Combine Your Files" section.

See also new gitweb/static/js/README file.

Inspired-by-patch-by: John 'Warthog9' Hawley <warthog9@eaglescrag.net>
Signed-off-by: Jakub Narebski <jnareb@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/.gitignore b/.gitignore
index 2cf3ca5808b51be3921a0f25b5871f806ce447e1..9e9500540ec6f3c73c5899e8309324c50a1e0706 100644 (file)
--- a/.gitignore
+++ b/.gitignore
@@ -158,6 +158,7 @@
 /gitk-git/gitk-wish
 /gitweb/GITWEB-BUILD-OPTIONS
 /gitweb/gitweb.cgi
+/gitweb/static/gitweb.js
 /gitweb/static/gitweb.min.*
 /test-chmtime
 /test-ctype

diff --git a/gitweb/Makefile b/gitweb/Makefile
index 0a6ac00631ed8eac5c20248a345074e4b8ff3707..0baa9df9f65a2db85d5265847c653b35dd3d9e80 100644 (file)
--- a/gitweb/Makefile
+++ b/gitweb/Makefile
@@ -86,7 +86,7 @@ ifndef V
 endif
 endif
 
-all:: gitweb.cgi
+all:: gitweb.cgi static/gitweb.js
 
 GITWEB_PROGRAMS = gitweb.cgi
 
@@ -112,6 +112,15 @@ endif
 
 GITWEB_FILES += static/git-logo.png static/git-favicon.png
 
+# JavaScript files that are composed (concatenated) to form gitweb.js
+#
+# js/lib/common-lib.js should be always first, then js/lib/*.js,
+# then the rest of files; js/gitweb.js should be last (if it exists)
+GITWEB_JSLIB_FILES += static/js/lib/common-lib.js
+GITWEB_JSLIB_FILES += static/js/javascript-detection.js
+GITWEB_JSLIB_FILES += static/js/blame_incremental.js
+
+
 GITWEB_REPLACE = \
        -e 's|++GIT_VERSION++|$(GIT_VERSION)|g' \
        -e 's|++GIT_BINDIR++|$(bindir)|g' \
@@ -146,6 +155,11 @@ gitweb.cgi: gitweb.perl GITWEB-BUILD-OPTIONS
        chmod +x $@+ && \
        mv $@+ $@
 
+static/gitweb.js: $(GITWEB_JSLIB_FILES)
+       $(QUIET_GEN)$(RM) $@ $@+ && \
+       cat $^ >$@+ && \
+       mv $@+ $@
+
 ### Testing rules
 
 test:

diff --git a/gitweb/static/gitweb.js b/gitweb/static/gitweb.js
deleted file mode 100644 (file)
index 40ec084..0000000
--- a/gitweb/static/gitweb.js
+++ /dev/null
@@ -1,889 +0,0 @@
-// Copyright (C) 2007, Fredrik Kuivinen <frekui@gmail.com>
-//               2007, Petr Baudis <pasky@suse.cz>
-//          2008-2009, Jakub Narebski <jnareb@gmail.com>
-
-/**
- * @fileOverview JavaScript code for gitweb (git web interface).
- * @license GPLv2 or later
- */
-
-/* ============================================================ */
-/* functions for generic gitweb actions and views */
-
-/**
- * used to check if link has 'js' query parameter already (at end),
- * and other reasons to not add 'js=1' param at the end of link
- * @constant
- */
-var jsExceptionsRe = /[;?]js=[01]$/;
-
-/**
- * Add '?js=1' or ';js=1' to the end of every link in the document
- * that doesn't have 'js' query parameter set already.
- *
- * Links with 'js=1' lead to JavaScript version of given action, if it
- * exists (currently there is only 'blame_incremental' for 'blame')
- *
- * @globals jsExceptionsRe
- */
-function fixLinks() {
-       var allLinks = document.getElementsByTagName("a") || document.links;
-       for (var i = 0, len = allLinks.length; i < len; i++) {
-               var link = allLinks[i];
-               if (!jsExceptionsRe.test(link)) { // =~ /[;?]js=[01]$/;
-                       link.href +=
-                               (link.href.indexOf('?') === -1 ? '?' : ';') + 'js=1';
-               }
-       }
-}
-
-
-/* ============================================================ */
-
-/*
- * This code uses DOM methods instead of (nonstandard) innerHTML
- * to modify page.
- *
- * innerHTML is non-standard IE extension, though supported by most
- * browsers; however Firefox up to version 1.5 didn't implement it in
- * a strict mode (application/xml+xhtml mimetype).
- *
- * Also my simple benchmarks show that using elem.firstChild.data =
- * 'content' is slightly faster than elem.innerHTML = 'content'.  It
- * is however more fragile (text element fragment must exists), and
- * less feature-rich (we cannot add HTML).
- *
- * Note that DOM 2 HTML is preferred over generic DOM 2 Core; the
- * equivalent using DOM 2 Core is usually shown in comments.
- */
-
-
-/* ============================================================ */
-/* generic utility functions */
-
-
-/**
- * pad number N with nonbreakable spaces on the left, to WIDTH characters
- * example: padLeftStr(12, 3, '\u00A0') == '\u00A012'
- *          ('\u00A0' is nonbreakable space)
- *
- * @param {Number|String} input: number to pad
- * @param {Number} width: visible width of output
- * @param {String} str: string to prefix to string, e.g. '\u00A0'
- * @returns {String} INPUT prefixed with (WIDTH - INPUT.length) x STR
- */
-function padLeftStr(input, width, str) {
-       var prefix = '';
-
-       width -= input.toString().length;
-       while (width > 0) {
-               prefix += str;
-               width--;
-       }
-       return prefix + input;
-}
-
-/**
- * Pad INPUT on the left to SIZE width, using given padding character CH,
- * for example padLeft('a', 3, '_') is '__a'.
- *
- * @param {String} input: input value converted to string.
- * @param {Number} width: desired length of output.
- * @param {String} ch: single character to prefix to string.
- *
- * @returns {String} Modified string, at least SIZE length.
- */
-function padLeft(input, width, ch) {
-       var s = input + "";
-       while (s.length < width) {
-               s = ch + s;
-       }
-       return s;
-}
-
-/**
- * Create XMLHttpRequest object in cross-browser way
- * @returns XMLHttpRequest object, or null
- */
-function createRequestObject() {
-       try {
-               return new XMLHttpRequest();
-       } catch (e) {}
-       try {
-               return window.createRequest();
-       } catch (e) {}
-       try {
-               return new ActiveXObject("Msxml2.XMLHTTP");
-       } catch (e) {}
-       try {
-               return new ActiveXObject("Microsoft.XMLHTTP");
-       } catch (e) {}
-
-       return null;
-}
-
-
-/* ============================================================ */
-/* utility/helper functions (and variables) */
-
-var xhr;        // XMLHttpRequest object
-var projectUrl; // partial query + separator ('?' or ';')
-
-// 'commits' is an associative map. It maps SHA1s to Commit objects.
-var commits = {};
-
-/**
- * constructor for Commit objects, used in 'blame'
- * @class Represents a blamed commit
- * @param {String} sha1: SHA-1 identifier of a commit
- */
-function Commit(sha1) {
-       if (this instanceof Commit) {
-               this.sha1 = sha1;
-               this.nprevious = 0; /* number of 'previous', effective parents */
-       } else {
-               return new Commit(sha1);
-       }
-}
-
-/* ............................................................ */
-/* progress info, timing, error reporting */
-
-var blamedLines = 0;
-var totalLines  = '???';
-var div_progress_bar;
-var div_progress_info;
-
-/**
- * Detects how many lines does a blamed file have,
- * This information is used in progress info
- *
- * @returns {Number|String} Number of lines in file, or string '...'
- */
-function countLines() {
-       var table =
-               document.getElementById('blame_table') ||
-               document.getElementsByTagName('table')[0];
-
-       if (table) {
-               return table.getElementsByTagName('tr').length - 1; // for header
-       } else {
-               return '...';
-       }
-}
-
-/**
- * update progress info and length (width) of progress bar
- *
- * @globals div_progress_info, div_progress_bar, blamedLines, totalLines
- */
-function updateProgressInfo() {
-       if (!div_progress_info) {
-               div_progress_info = document.getElementById('progress_info');
-       }
-       if (!div_progress_bar) {
-               div_progress_bar = document.getElementById('progress_bar');
-       }
-       if (!div_progress_info && !div_progress_bar) {
-               return;
-       }
-
-       var percentage = Math.floor(100.0*blamedLines/totalLines);
-
-       if (div_progress_info) {
-               div_progress_info.firstChild.data  = blamedLines + ' / ' + totalLines +
-                       ' (' + padLeftStr(percentage, 3, '\u00A0') + '%)';
-       }
-
-       if (div_progress_bar) {
-               //div_progress_bar.setAttribute('style', 'width: '+percentage+'%;');
-               div_progress_bar.style.width = percentage + '%';
-       }
-}
-
-
-var t_interval_server = '';
-var cmds_server = '';
-var t0 = new Date();
-
-/**
- * write how much it took to generate data, and to run script
- *
- * @globals t0, t_interval_server, cmds_server
- */
-function writeTimeInterval() {
-       var info_time = document.getElementById('generating_time');
-       if (!info_time || !t_interval_server) {
-               return;
-       }
-       var t1 = new Date();
-       info_time.firstChild.data += ' + (' +
-               t_interval_server + ' sec server blame_data / ' +
-               (t1.getTime() - t0.getTime())/1000 + ' sec client JavaScript)';
-
-       var info_cmds = document.getElementById('generating_cmd');
-       if (!info_time || !cmds_server) {
-               return;
-       }
-       info_cmds.firstChild.data += ' + ' + cmds_server;
-}
-
-/**
- * show an error message alert to user within page (in prohress info area)
- * @param {String} str: plain text error message (no HTML)
- *
- * @globals div_progress_info
- */
-function errorInfo(str) {
-       if (!div_progress_info) {
-               div_progress_info = document.getElementById('progress_info');
-       }
-       if (div_progress_info) {
-               div_progress_info.className = 'error';
-               div_progress_info.firstChild.data = str;
-       }
-}
-
-/* ............................................................ */
-/* coloring rows during blame_data (git blame --incremental) run */
-
-/**
- * used to extract N from 'colorN', where N is a number,
- * @constant
- */
-var colorRe = /\bcolor([0-9]*)\b/;
-
-/**
- * return N if <tr class="colorN">, otherwise return null
- * (some browsers require CSS class names to begin with letter)
- *
- * @param {HTMLElement} tr: table row element to check
- * @param {String} tr.className: 'class' attribute of tr element
- * @returns {Number|null} N if tr.className == 'colorN', otherwise null
- *
- * @globals colorRe
- */
-function getColorNo(tr) {
-       if (!tr) {
-               return null;
-       }
-       var className = tr.className;
-       if (className) {
-               var match = colorRe.exec(className);
-               if (match) {
-                       return parseInt(match[1], 10);
-               }
-       }
-       return null;
-}
-
-var colorsFreq = [0, 0, 0];
-/**
- * return one of given possible colors (curently least used one)
- * example: chooseColorNoFrom(2, 3) returns 2 or 3
- *
- * @param {Number[]} arguments: one or more numbers
- *        assumes that  1 <= arguments[i] <= colorsFreq.length
- * @returns {Number} Least used color number from arguments
- * @globals colorsFreq
- */
-function chooseColorNoFrom() {
-       // choose the color which is least used
-       var colorNo = arguments[0];
-       for (var i = 1; i < arguments.length; i++) {
-               if (colorsFreq[arguments[i]-1] < colorsFreq[colorNo-1]) {
-                       colorNo = arguments[i];
-               }
-       }
-       colorsFreq[colorNo-1]++;
-       return colorNo;
-}
-
-/**
- * given two neigbour <tr> elements, find color which would be different
- * from color of both of neighbours; used to 3-color blame table
- *
- * @param {HTMLElement} tr_prev
- * @param {HTMLElement} tr_next
- * @returns {Number} color number N such that
- * colorN != tr_prev.className && colorN != tr_next.className
- */
-function findColorNo(tr_prev, tr_next) {
-       var color_prev = getColorNo(tr_prev);
-       var color_next = getColorNo(tr_next);
-
-
-       // neither of neighbours has color set
-       // THEN we can use any of 3 possible colors
-       if (!color_prev && !color_next) {
-               return chooseColorNoFrom(1,2,3);
-       }
-
-       // either both neighbours have the same color,
-       // or only one of neighbours have color set
-       // THEN we can use any color except given
-       var color;
-       if (color_prev === color_next) {
-               color = color_prev; // = color_next;
-       } else if (!color_prev) {
-               color = color_next;
-       } else if (!color_next) {
-               color = color_prev;
-       }
-       if (color) {
-               return chooseColorNoFrom((color % 3) + 1, ((color+1) % 3) + 1);
-       }
-
-       // neighbours have different colors
-       // THEN there is only one color left
-       return (3 - ((color_prev + color_next) % 3));
-}
-
-/* ............................................................ */
-/* coloring rows like 'blame' after 'blame_data' finishes */
-
-/**
- * returns true if given row element (tr) is first in commit group
- * to be used only after 'blame_data' finishes (after processing)
- *
- * @param {HTMLElement} tr: table row
- * @returns {Boolean} true if TR is first in commit group
- */
-function isStartOfGroup(tr) {
-       return tr.firstChild.className === 'sha1';
-}
-
-/**
- * change colors to use zebra coloring (2 colors) instead of 3 colors
- * concatenate neighbour commit groups belonging to the same commit
- *
- * @globals colorRe
- */
-function fixColorsAndGroups() {
-       var colorClasses = ['light', 'dark'];
-       var linenum = 1;
-       var tr, prev_group;
-       var colorClass = 0;
-       var table =
-               document.getElementById('blame_table') ||
-               document.getElementsByTagName('table')[0];
-
-       while ((tr = document.getElementById('l'+linenum))) {
-       // index origin is 0, which is table header; start from 1
-       //while ((tr = table.rows[linenum])) { // <- it is slower
-               if (isStartOfGroup(tr, linenum, document)) {
-                       if (prev_group &&
-                           prev_group.firstChild.firstChild.href ===
-                                   tr.firstChild.firstChild.href) {
-                               // we have to concatenate groups
-                               var prev_rows = prev_group.firstChild.rowSpan || 1;
-                               var curr_rows =         tr.firstChild.rowSpan || 1;
-                               prev_group.firstChild.rowSpan = prev_rows + curr_rows;
-                               //tr.removeChild(tr.firstChild);
-                               tr.deleteCell(0); // DOM2 HTML way
-                       } else {
-                               colorClass = (colorClass + 1) % 2;
-                               prev_group = tr;
-                       }
-               }
-               var tr_class = tr.className;
-               tr.className = tr_class.replace(colorRe, colorClasses[colorClass]);
-               linenum++;
-       }
-}
-
-/* ............................................................ */
-/* time and data */
-
-/**
- * used to extract hours and minutes from timezone info, e.g '-0900'
- * @constant
- */
-var tzRe = /^([+-])([0-9][0-9])([0-9][0-9])$/;
-
-/**
- * convert numeric timezone +/-ZZZZ to offset from UTC in seconds
- *
- * @param {String} timezoneInfo: numeric timezone '(+|-)HHMM'
- * @returns {Number} offset from UTC in seconds for timezone
- *
- * @globals tzRe
- */
-function timezoneOffset(timezoneInfo) {
-       var match = tzRe.exec(timezoneInfo);
-       var tz_sign = (match[1] === '-' ? -1 : +1);
-       var tz_hour = parseInt(match[2],10);
-       var tz_min  = parseInt(match[3],10);
-
-       return tz_sign*(((tz_hour*60) + tz_min)*60);
-}
-
-/**
- * return date in local time formatted in iso-8601 like format
- * 'yyyy-mm-dd HH:MM:SS +/-ZZZZ' e.g. '2005-08-07 21:49:46 +0200'
- *
- * @param {Number} epoch: seconds since '00:00:00 1970-01-01 UTC'
- * @param {String} timezoneInfo: numeric timezone '(+|-)HHMM'
- * @returns {String} date in local time in iso-8601 like format
- */
-function formatDateISOLocal(epoch, timezoneInfo) {
-       // date corrected by timezone
-       var localDate = new Date(1000 * (epoch +
-               timezoneOffset(timezoneInfo)));
-       var localDateStr = // e.g. '2005-08-07'
-               localDate.getUTCFullYear()                 + '-' +
-               padLeft(localDate.getUTCMonth()+1, 2, '0') + '-' +
-               padLeft(localDate.getUTCDate(),    2, '0');
-       var localTimeStr = // e.g. '21:49:46'
-               padLeft(localDate.getUTCHours(),   2, '0') + ':' +
-               padLeft(localDate.getUTCMinutes(), 2, '0') + ':' +
-               padLeft(localDate.getUTCSeconds(), 2, '0');
-
-       return localDateStr + ' ' + localTimeStr + ' ' + timezoneInfo;
-}
-
-/* ............................................................ */
-/* unquoting/unescaping filenames */
-
-/**#@+
- * @constant
- */
-var escCodeRe = /\\([^0-7]|[0-7]{1,3})/g;
-var octEscRe = /^[0-7]{1,3}$/;
-var maybeQuotedRe = /^\"(.*)\"$/;
-/**#@-*/
-
-/**
- * unquote maybe git-quoted filename
- * e.g. 'aa' -> 'aa', '"a\ta"' -> 'a   a'
- *
- * @param {String} str: git-quoted string
- * @returns {String} Unquoted and unescaped string
- *
- * @globals escCodeRe, octEscRe, maybeQuotedRe
- */
-function unquote(str) {
-       function unq(seq) {
-               var es = {
-                       // character escape codes, aka escape sequences (from C)
-                       // replacements are to some extent JavaScript specific
-                       t: "\t",   // tab            (HT, TAB)
-                       n: "\n",   // newline        (NL)
-                       r: "\r",   // return         (CR)
-                       f: "\f",   // form feed      (FF)
-                       b: "\b",   // backspace      (BS)
-                       a: "\x07", // alarm (bell)   (BEL)
-                       e: "\x1B", // escape         (ESC)
-                       v: "\v"    // vertical tab   (VT)
-               };
-
-               if (seq.search(octEscRe) !== -1) {
-                       // octal char sequence
-                       return String.fromCharCode(parseInt(seq, 8));
-               } else if (seq in es) {
-                       // C escape sequence, aka character escape code
-                       return es[seq];
-               }
-               // quoted ordinary character
-               return seq;
-       }
-
-       var match = str.match(maybeQuotedRe);
-       if (match) {
-               str = match[1];
-               // perhaps str = eval('"'+str+'"'); would be enough?
-               str = str.replace(escCodeRe,
-                       function (substr, p1, offset, s) { return unq(p1); });
-       }
-       return str;
-}
-
-/* ============================================================ */
-/* main part: parsing response */
-
-/**
- * Function called for each blame entry, as soon as it finishes.
- * It updates page via DOM manipulation, adding sha1 info, etc.
- *
- * @param {Commit} commit: blamed commit
- * @param {Object} group: object representing group of lines,
- *                        which blame the same commit (blame entry)
- *
- * @globals blamedLines
- */
-function handleLine(commit, group) {
-       /*
-          This is the structure of the HTML fragment we are working
-          with:
-
-          <tr id="l123" class="">
-            <td class="sha1" title=""><a href=""> </a></td>
-            <td class="linenr"><a class="linenr" href="">123</a></td>
-            <td class="pre"># times (my ext3 doesn&#39;t).</td>
-          </tr>
-       */
-
-       var resline = group.resline;
-
-       // format date and time string only once per commit
-       if (!commit.info) {
-               /* e.g. 'Kay Sievers, 2005-08-07 21:49:46 +0200' */
-               commit.info = commit.author + ', ' +
-                       formatDateISOLocal(commit.authorTime, commit.authorTimezone);
-       }
-
-       // color depends on group of lines, not only on blamed commit
-       var colorNo = findColorNo(
-               document.getElementById('l'+(resline-1)),
-               document.getElementById('l'+(resline+group.numlines))
-       );
-
-       // loop over lines in commit group
-       for (var i = 0; i < group.numlines; i++, resline++) {
-               var tr = document.getElementById('l'+resline);
-               if (!tr) {
-                       break;
-               }
-               /*
-                       <tr id="l123" class="">
-                         <td class="sha1" title=""><a href=""> </a></td>
-                         <td class="linenr"><a class="linenr" href="">123</a></td>
-                         <td class="pre"># times (my ext3 doesn&#39;t).</td>
-                       </tr>
-               */
-               var td_sha1  = tr.firstChild;
-               var a_sha1   = td_sha1.firstChild;
-               var a_linenr = td_sha1.nextSibling.firstChild;
-
-               /* <tr id="l123" class=""> */
-               var tr_class = '';
-               if (colorNo !== null) {
-                       tr_class = 'color'+colorNo;
-               }
-               if (commit.boundary) {
-                       tr_class += ' boundary';
-               }
-               if (commit.nprevious === 0) {
-                       tr_class += ' no-previous';
-               } else if (commit.nprevious > 1) {
-                       tr_class += ' multiple-previous';
-               }
-               tr.className = tr_class;
-
-               /* <td class="sha1" title="?" rowspan="?"><a href="?">?</a></td> */
-               if (i === 0) {
-                       td_sha1.title = commit.info;
-                       td_sha1.rowSpan = group.numlines;
-
-                       a_sha1.href = projectUrl + 'a=commit;h=' + commit.sha1;
-                       if (a_sha1.firstChild) {
-                               a_sha1.firstChild.data = commit.sha1.substr(0, 8);
-                       } else {
-                               a_sha1.appendChild(
-                                       document.createTextNode(commit.sha1.substr(0, 8)));
-                       }
-                       if (group.numlines >= 2) {
-                               var fragment = document.createDocumentFragment();
-                               var br   = document.createElement("br");
-                               var match = commit.author.match(/\b([A-Z])\B/g);
-                               if (match) {
-                                       var text = document.createTextNode(
-                                                       match.join(''));
-                               }
-                               if (br && text) {
-                                       var elem = fragment || td_sha1;
-                                       elem.appendChild(br);
-                                       elem.appendChild(text);
-                                       if (fragment) {
-                                               td_sha1.appendChild(fragment);
-                                       }
-                               }
-                       }
-               } else {
-                       //tr.removeChild(td_sha1); // DOM2 Core way
-                       tr.deleteCell(0); // DOM2 HTML way
-               }
-
-               /* <td class="linenr"><a class="linenr" href="?">123</a></td> */
-               var linenr_commit =
-                       ('previous' in commit ? commit.previous : commit.sha1);
-               var linenr_filename =
-                       ('file_parent' in commit ? commit.file_parent : commit.filename);
-               a_linenr.href = projectUrl + 'a=blame_incremental' +
-                       ';hb=' + linenr_commit +
-                       ';f='  + encodeURIComponent(linenr_filename) +
-                       '#l' + (group.srcline + i);
-
-               blamedLines++;
-
-               //updateProgressInfo();
-       }
-}
-
-// ----------------------------------------------------------------------
-
-var inProgress = false;   // are we processing response
-
-/**#@+
- * @constant
- */
-var sha1Re = /^([0-9a-f]{40}) ([0-9]+) ([0-9]+) ([0-9]+)/;
-var infoRe = /^([a-z-]+) ?(.*)/;
-var endRe  = /^END ?([^ ]*) ?(.*)/;
-/**@-*/
-
-var curCommit = new Commit();
-var curGroup  = {};
-
-var pollTimer = null;
-
-/**
- * Parse output from 'git blame --incremental [...]', received via
- * XMLHttpRequest from server (blamedataUrl), and call handleLine
- * (which updates page) as soon as blame entry is completed.
- *
- * @param {String[]} lines: new complete lines from blamedata server
- *
- * @globals commits, curCommit, curGroup, t_interval_server, cmds_server
- * @globals sha1Re, infoRe, endRe
- */
-function processBlameLines(lines) {
-       var match;
-
-       for (var i = 0, len = lines.length; i < len; i++) {
-
-               if ((match = sha1Re.exec(lines[i]))) {
-                       var sha1 = match[1];
-                       var srcline  = parseInt(match[2], 10);
-                       var resline  = parseInt(match[3], 10);
-                       var numlines = parseInt(match[4], 10);
-
-                       var c = commits[sha1];
-                       if (!c) {
-                               c = new Commit(sha1);
-                               commits[sha1] = c;
-                       }
-                       curCommit = c;
-
-                       curGroup.srcline = srcline;
-                       curGroup.resline = resline;
-                       curGroup.numlines = numlines;
-
-               } else if ((match = infoRe.exec(lines[i]))) {
-                       var info = match[1];
-                       var data = match[2];
-                       switch (info) {
-                       case 'filename':
-                               curCommit.filename = unquote(data);
-                               // 'filename' information terminates the entry
-                               handleLine(curCommit, curGroup);
-                               updateProgressInfo();
-                               break;
-                       case 'author':
-                               curCommit.author = data;
-                               break;
-                       case 'author-time':
-                               curCommit.authorTime = parseInt(data, 10);
-                               break;
-                       case 'author-tz':
-                               curCommit.authorTimezone = data;
-                               break;
-                       case 'previous':
-                               curCommit.nprevious++;
-                               // store only first 'previous' header
-                               if (!'previous' in curCommit) {
-                                       var parts = data.split(' ', 2);
-                                       curCommit.previous    = parts[0];
-                                       curCommit.file_parent = unquote(parts[1]);
-                               }
-                               break;
-                       case 'boundary':
-                               curCommit.boundary = true;
-                               break;
-                       } // end switch
-
-               } else if ((match = endRe.exec(lines[i]))) {
-                       t_interval_server = match[1];
-                       cmds_server = match[2];
-
-               } else if (lines[i] !== '') {
-                       // malformed line
-
-               } // end if (match)
-
-       } // end for (lines)
-}
-
-/**
- * Process new data and return pointer to end of processed part
- *
- * @param {String} unprocessed: new data (from nextReadPos)
- * @param {Number} nextReadPos: end of last processed data
- * @return {Number} end of processed data (new value for nextReadPos)
- */
-function processData(unprocessed, nextReadPos) {
-       var lastLineEnd = unprocessed.lastIndexOf('\n');
-       if (lastLineEnd !== -1) {
-               var lines = unprocessed.substring(0, lastLineEnd).split('\n');
-               nextReadPos += lastLineEnd + 1 /* 1 == '\n'.length */;
-
-               processBlameLines(lines);
-       } // end if
-
-       return nextReadPos;
-}
-
-/**
- * Handle XMLHttpRequest errors
- *
- * @param {XMLHttpRequest} xhr: XMLHttpRequest object
- *
- * @globals pollTimer, commits, inProgress
- */
-function handleError(xhr) {
-       errorInfo('Server error: ' +
-               xhr.status + ' - ' + (xhr.statusText || 'Error contacting server'));
-
-       clearInterval(pollTimer);
-       commits = {}; // free memory
-
-       inProgress = false;
-}
-
-/**
- * Called after XMLHttpRequest finishes (loads)
- *
- * @param {XMLHttpRequest} xhr: XMLHttpRequest object (unused)
- *
- * @globals pollTimer, commits, inProgress
- */
-function responseLoaded(xhr) {
-       clearInterval(pollTimer);
-
-       fixColorsAndGroups();
-       writeTimeInterval();
-       commits = {}; // free memory
-
-       inProgress = false;
-}
-
-/**
- * handler for XMLHttpRequest onreadystatechange event
- * @see startBlame
- *
- * @globals xhr, inProgress
- */
-function handleResponse() {
-
-       /*
-        * xhr.readyState
-        *
-        *  Value  Constant (W3C)    Description
-        *  -------------------------------------------------------------------
-        *  0      UNSENT            open() has not been called yet.
-        *  1      OPENED            send() has not been called yet.
-        *  2      HEADERS_RECEIVED  send() has been called, and headers
-        *                           and status are available.
-        *  3      LOADING           Downloading; responseText holds partial data.
-        *  4      DONE              The operation is complete.
-        */
-
-       if (xhr.readyState !== 4 && xhr.readyState !== 3) {
-               return;
-       }
-
-       // the server returned error
-       // try ... catch block is to work around bug in IE8
-       try {
-               if (xhr.readyState === 3 && xhr.status !== 200) {
-                       return;
-               }
-       } catch (e) {
-               return;
-       }
-       if (xhr.readyState === 4 && xhr.status !== 200) {
-               handleError(xhr);
-               return;
-       }
-
-       // In konqueror xhr.responseText is sometimes null here...
-       if (xhr.responseText === null) {
-               return;
-       }
-
-       // in case we were called before finished processing
-       if (inProgress) {
-               return;
-       } else {
-               inProgress = true;
-       }
-
-       // extract new whole (complete) lines, and process them
-       while (xhr.prevDataLength !== xhr.responseText.length) {
-               if (xhr.readyState === 4 &&
-                   xhr.prevDataLength === xhr.responseText.length) {
-                       break;
-               }
-
-               xhr.prevDataLength = xhr.responseText.length;
-               var unprocessed = xhr.responseText.substring(xhr.nextReadPos);
-               xhr.nextReadPos = processData(unprocessed, xhr.nextReadPos);
-       } // end while
-
-       // did we finish work?
-       if (xhr.readyState === 4 &&
-           xhr.prevDataLength === xhr.responseText.length) {
-               responseLoaded(xhr);
-       }
-
-       inProgress = false;
-}
-
-// ============================================================
-// ------------------------------------------------------------
-
-/**
- * Incrementally update line data in blame_incremental view in gitweb.
- *
- * @param {String} blamedataUrl: URL to server script generating blame data.
- * @param {String} bUrl: partial URL to project, used to generate links.
- *
- * Called from 'blame_incremental' view after loading table with
- * file contents, a base for blame view.
- *
- * @globals xhr, t0, projectUrl, div_progress_bar, totalLines, pollTimer
-*/
-function startBlame(blamedataUrl, bUrl) {
-
-       xhr = createRequestObject();
-       if (!xhr) {
-               errorInfo('ERROR: XMLHttpRequest not supported');
-               return;
-       }
-
-       t0 = new Date();
-       projectUrl = bUrl + (bUrl.indexOf('?') === -1 ? '?' : ';');
-       if ((div_progress_bar = document.getElementById('progress_bar'))) {
-               //div_progress_bar.setAttribute('style', 'width: 100%;');
-               div_progress_bar.style.cssText = 'width: 100%;';
-       }
-       totalLines = countLines();
-       updateProgressInfo();
-
-       /* add extra properties to xhr object to help processing response */
-       xhr.prevDataLength = -1;  // used to detect if we have new data
-       xhr.nextReadPos = 0;      // where unread part of response starts
-
-       xhr.onreadystatechange = handleResponse;
-       //xhr.onreadystatechange = function () { handleResponse(xhr); };
-
-       xhr.open('GET', blamedataUrl);
-       xhr.setRequestHeader('Accept', 'text/plain');
-       xhr.send(null);
-
-       // not all browsers call onreadystatechange event on each server flush
-       // poll response using timer every second to handle this issue
-       pollTimer = setInterval(xhr.onreadystatechange, 1000);
-}
-
-// end of gitweb.js

diff --git a/gitweb/static/js/README b/gitweb/static/js/README
new file mode 100644 (file)
index 0000000..f8460ed
--- /dev/null
+++ b/gitweb/static/js/README
@@ -0,0 +1,20 @@
+GIT web interface (gitweb) - JavaScript
+=======================================
+
+This directory holds JavaScript code used by gitweb (GIT web interface).
+Scripts from there would be concatenated together in the order specified
+by gitweb/Makefile into gitweb/static/gitweb.js, during building of
+gitweb/gitweb.cgi (during gitweb building).  The resulting file (or its
+minification) would then be installed / deployed together with gitweb.
+
+Scripts in 'lib/' subdirectory compose generic JavaScript library,
+providing features required by gitweb but in no way limited to gitweb
+only.  In the future those scripts could be replaced by some JavaScript
+library / framework, like e.g. jQuery, YUI, Prototype, MooTools, Dojo,
+ExtJS, Script.aculo.us or SproutCore.
+
+All scripts that manipulate gitweb output should be put outside 'lib/',
+directly in this directory ('gitweb/static/js/').  Those scripts would
+have to be rewritten if gitweb moves to using some JavaScript library.
+
+See also comments in gitweb/Makefile.

diff --git a/gitweb/static/js/blame_incremental.js b/gitweb/static/js/blame_incremental.js
new file mode 100644 (file)
index 0000000..f63f78b
--- /dev/null
+++ b/gitweb/static/js/blame_incremental.js
@@ -0,0 +1,687 @@
+// Copyright (C) 2007, Fredrik Kuivinen <frekui@gmail.com>
+//               2007, Petr Baudis <pasky@suse.cz>
+//          2008-2011, Jakub Narebski <jnareb@gmail.com>
+
+/**
+ * @fileOverview JavaScript side of Ajax-y 'blame_incremental' view in gitweb
+ * @license GPLv2 or later
+ */
+
+
+/*
+ * This code uses DOM methods instead of (nonstandard) innerHTML
+ * to modify page.
+ *
+ * innerHTML is non-standard IE extension, though supported by most
+ * browsers; however Firefox up to version 1.5 didn't implement it in
+ * a strict mode (application/xml+xhtml mimetype).
+ *
+ * Also my simple benchmarks show that using elem.firstChild.data =
+ * 'content' is slightly faster than elem.innerHTML = 'content'.  It
+ * is however more fragile (text element fragment must exists), and
+ * less feature-rich (we cannot add HTML).
+ *
+ * Note that DOM 2 HTML is preferred over generic DOM 2 Core; the
+ * equivalent using DOM 2 Core is usually shown in comments.
+ */
+
+
+/* ============================================================ */
+/* utility/helper functions (and variables) */
+
+var xhr;        // XMLHttpRequest object
+var projectUrl; // partial query + separator ('?' or ';')
+
+// 'commits' is an associative map. It maps SHA1s to Commit objects.
+var commits = {};
+
+/**
+ * constructor for Commit objects, used in 'blame'
+ * @class Represents a blamed commit
+ * @param {String} sha1: SHA-1 identifier of a commit
+ */
+function Commit(sha1) {
+       if (this instanceof Commit) {
+               this.sha1 = sha1;
+               this.nprevious = 0; /* number of 'previous', effective parents */
+       } else {
+               return new Commit(sha1);
+       }
+}
+
+/* ............................................................ */
+/* progress info, timing, error reporting */
+
+var blamedLines = 0;
+var totalLines  = '???';
+var div_progress_bar;
+var div_progress_info;
+
+/**
+ * Detects how many lines does a blamed file have,
+ * This information is used in progress info
+ *
+ * @returns {Number|String} Number of lines in file, or string '...'
+ */
+function countLines() {
+       var table =
+               document.getElementById('blame_table') ||
+               document.getElementsByTagName('table')[0];
+
+       if (table) {
+               return table.getElementsByTagName('tr').length - 1; // for header
+       } else {
+               return '...';
+       }
+}
+
+/**
+ * update progress info and length (width) of progress bar
+ *
+ * @globals div_progress_info, div_progress_bar, blamedLines, totalLines
+ */
+function updateProgressInfo() {
+       if (!div_progress_info) {
+               div_progress_info = document.getElementById('progress_info');
+       }
+       if (!div_progress_bar) {
+               div_progress_bar = document.getElementById('progress_bar');
+       }
+       if (!div_progress_info && !div_progress_bar) {
+               return;
+       }
+
+       var percentage = Math.floor(100.0*blamedLines/totalLines);
+
+       if (div_progress_info) {
+               div_progress_info.firstChild.data  = blamedLines + ' / ' + totalLines +
+                       ' (' + padLeftStr(percentage, 3, '\u00A0') + '%)';
+       }
+
+       if (div_progress_bar) {
+               //div_progress_bar.setAttribute('style', 'width: '+percentage+'%;');
+               div_progress_bar.style.width = percentage + '%';
+       }
+}
+
+
+var t_interval_server = '';
+var cmds_server = '';
+var t0 = new Date();
+
+/**
+ * write how much it took to generate data, and to run script
+ *
+ * @globals t0, t_interval_server, cmds_server
+ */
+function writeTimeInterval() {
+       var info_time = document.getElementById('generating_time');
+       if (!info_time || !t_interval_server) {
+               return;
+       }
+       var t1 = new Date();
+       info_time.firstChild.data += ' + (' +
+               t_interval_server + ' sec server blame_data / ' +
+               (t1.getTime() - t0.getTime())/1000 + ' sec client JavaScript)';
+
+       var info_cmds = document.getElementById('generating_cmd');
+       if (!info_time || !cmds_server) {
+               return;
+       }
+       info_cmds.firstChild.data += ' + ' + cmds_server;
+}
+
+/**
+ * show an error message alert to user within page (in prohress info area)
+ * @param {String} str: plain text error message (no HTML)
+ *
+ * @globals div_progress_info
+ */
+function errorInfo(str) {
+       if (!div_progress_info) {
+               div_progress_info = document.getElementById('progress_info');
+       }
+       if (div_progress_info) {
+               div_progress_info.className = 'error';
+               div_progress_info.firstChild.data = str;
+       }
+}
+
+/* ............................................................ */
+/* coloring rows during blame_data (git blame --incremental) run */
+
+/**
+ * used to extract N from 'colorN', where N is a number,
+ * @constant
+ */
+var colorRe = /\bcolor([0-9]*)\b/;
+
+/**
+ * return N if <tr class="colorN">, otherwise return null
+ * (some browsers require CSS class names to begin with letter)
+ *
+ * @param {HTMLElement} tr: table row element to check
+ * @param {String} tr.className: 'class' attribute of tr element
+ * @returns {Number|null} N if tr.className == 'colorN', otherwise null
+ *
+ * @globals colorRe
+ */
+function getColorNo(tr) {
+       if (!tr) {
+               return null;
+       }
+       var className = tr.className;
+       if (className) {
+               var match = colorRe.exec(className);
+               if (match) {
+                       return parseInt(match[1], 10);
+               }
+       }
+       return null;
+}
+
+var colorsFreq = [0, 0, 0];
+/**
+ * return one of given possible colors (curently least used one)
+ * example: chooseColorNoFrom(2, 3) returns 2 or 3
+ *
+ * @param {Number[]} arguments: one or more numbers
+ *        assumes that  1 <= arguments[i] <= colorsFreq.length
+ * @returns {Number} Least used color number from arguments
+ * @globals colorsFreq
+ */
+function chooseColorNoFrom() {
+       // choose the color which is least used
+       var colorNo = arguments[0];
+       for (var i = 1; i < arguments.length; i++) {
+               if (colorsFreq[arguments[i]-1] < colorsFreq[colorNo-1]) {
+                       colorNo = arguments[i];
+               }
+       }
+       colorsFreq[colorNo-1]++;
+       return colorNo;
+}
+
+/**
+ * given two neigbour <tr> elements, find color which would be different
+ * from color of both of neighbours; used to 3-color blame table
+ *
+ * @param {HTMLElement} tr_prev
+ * @param {HTMLElement} tr_next
+ * @returns {Number} color number N such that
+ * colorN != tr_prev.className && colorN != tr_next.className
+ */
+function findColorNo(tr_prev, tr_next) {
+       var color_prev = getColorNo(tr_prev);
+       var color_next = getColorNo(tr_next);
+
+
+       // neither of neighbours has color set
+       // THEN we can use any of 3 possible colors
+       if (!color_prev && !color_next) {
+               return chooseColorNoFrom(1,2,3);
+       }
+
+       // either both neighbours have the same color,
+       // or only one of neighbours have color set
+       // THEN we can use any color except given
+       var color;
+       if (color_prev === color_next) {
+               color = color_prev; // = color_next;
+       } else if (!color_prev) {
+               color = color_next;
+       } else if (!color_next) {
+               color = color_prev;
+       }
+       if (color) {
+               return chooseColorNoFrom((color % 3) + 1, ((color+1) % 3) + 1);
+       }
+
+       // neighbours have different colors
+       // THEN there is only one color left
+       return (3 - ((color_prev + color_next) % 3));
+}
+
+/* ............................................................ */
+/* coloring rows like 'blame' after 'blame_data' finishes */
+
+/**
+ * returns true if given row element (tr) is first in commit group
+ * to be used only after 'blame_data' finishes (after processing)
+ *
+ * @param {HTMLElement} tr: table row
+ * @returns {Boolean} true if TR is first in commit group
+ */
+function isStartOfGroup(tr) {
+       return tr.firstChild.className === 'sha1';
+}
+
+/**
+ * change colors to use zebra coloring (2 colors) instead of 3 colors
+ * concatenate neighbour commit groups belonging to the same commit
+ *
+ * @globals colorRe
+ */
+function fixColorsAndGroups() {
+       var colorClasses = ['light', 'dark'];
+       var linenum = 1;
+       var tr, prev_group;
+       var colorClass = 0;
+       var table =
+               document.getElementById('blame_table') ||
+               document.getElementsByTagName('table')[0];
+
+       while ((tr = document.getElementById('l'+linenum))) {
+       // index origin is 0, which is table header; start from 1
+       //while ((tr = table.rows[linenum])) { // <- it is slower
+               if (isStartOfGroup(tr, linenum, document)) {
+                       if (prev_group &&
+                           prev_group.firstChild.firstChild.href ===
+                                   tr.firstChild.firstChild.href) {
+                               // we have to concatenate groups
+                               var prev_rows = prev_group.firstChild.rowSpan || 1;
+                               var curr_rows =         tr.firstChild.rowSpan || 1;
+                               prev_group.firstChild.rowSpan = prev_rows + curr_rows;
+                               //tr.removeChild(tr.firstChild);
+                               tr.deleteCell(0); // DOM2 HTML way
+                       } else {
+                               colorClass = (colorClass + 1) % 2;
+                               prev_group = tr;
+                       }
+               }
+               var tr_class = tr.className;
+               tr.className = tr_class.replace(colorRe, colorClasses[colorClass]);
+               linenum++;
+       }
+}
+
+
+/* ============================================================ */
+/* main part: parsing response */
+
+/**
+ * Function called for each blame entry, as soon as it finishes.
+ * It updates page via DOM manipulation, adding sha1 info, etc.
+ *
+ * @param {Commit} commit: blamed commit
+ * @param {Object} group: object representing group of lines,
+ *                        which blame the same commit (blame entry)
+ *
+ * @globals blamedLines
+ */
+function handleLine(commit, group) {
+       /*
+          This is the structure of the HTML fragment we are working
+          with:
+
+          <tr id="l123" class="">
+            <td class="sha1" title=""><a href=""> </a></td>
+            <td class="linenr"><a class="linenr" href="">123</a></td>
+            <td class="pre"># times (my ext3 doesn&#39;t).</td>
+          </tr>
+       */
+
+       var resline = group.resline;
+
+       // format date and time string only once per commit
+       if (!commit.info) {
+               /* e.g. 'Kay Sievers, 2005-08-07 21:49:46 +0200' */
+               commit.info = commit.author + ', ' +
+                       formatDateISOLocal(commit.authorTime, commit.authorTimezone);
+       }
+
+       // color depends on group of lines, not only on blamed commit
+       var colorNo = findColorNo(
+               document.getElementById('l'+(resline-1)),
+               document.getElementById('l'+(resline+group.numlines))
+       );
+
+       // loop over lines in commit group
+       for (var i = 0; i < group.numlines; i++, resline++) {
+               var tr = document.getElementById('l'+resline);
+               if (!tr) {
+                       break;
+               }
+               /*
+                       <tr id="l123" class="">
+                         <td class="sha1" title=""><a href=""> </a></td>
+                         <td class="linenr"><a class="linenr" href="">123</a></td>
+                         <td class="pre"># times (my ext3 doesn&#39;t).</td>
+                       </tr>
+               */
+               var td_sha1  = tr.firstChild;
+               var a_sha1   = td_sha1.firstChild;
+               var a_linenr = td_sha1.nextSibling.firstChild;
+
+               /* <tr id="l123" class=""> */
+               var tr_class = '';
+               if (colorNo !== null) {
+                       tr_class = 'color'+colorNo;
+               }
+               if (commit.boundary) {
+                       tr_class += ' boundary';
+               }
+               if (commit.nprevious === 0) {
+                       tr_class += ' no-previous';
+               } else if (commit.nprevious > 1) {
+                       tr_class += ' multiple-previous';
+               }
+               tr.className = tr_class;
+
+               /* <td class="sha1" title="?" rowspan="?"><a href="?">?</a></td> */
+               if (i === 0) {
+                       td_sha1.title = commit.info;
+                       td_sha1.rowSpan = group.numlines;
+
+                       a_sha1.href = projectUrl + 'a=commit;h=' + commit.sha1;
+                       if (a_sha1.firstChild) {
+                               a_sha1.firstChild.data = commit.sha1.substr(0, 8);
+                       } else {
+                               a_sha1.appendChild(
+                                       document.createTextNode(commit.sha1.substr(0, 8)));
+                       }
+                       if (group.numlines >= 2) {
+                               var fragment = document.createDocumentFragment();
+                               var br   = document.createElement("br");
+                               var match = commit.author.match(/\b([A-Z])\B/g);
+                               if (match) {
+                                       var text = document.createTextNode(
+                                                       match.join(''));
+                               }
+                               if (br && text) {
+                                       var elem = fragment || td_sha1;
+                                       elem.appendChild(br);
+                                       elem.appendChild(text);
+                                       if (fragment) {
+                                               td_sha1.appendChild(fragment);
+                                       }
+                               }
+                       }
+               } else {
+                       //tr.removeChild(td_sha1); // DOM2 Core way
+                       tr.deleteCell(0); // DOM2 HTML way
+               }
+
+               /* <td class="linenr"><a class="linenr" href="?">123</a></td> */
+               var linenr_commit =
+                       ('previous' in commit ? commit.previous : commit.sha1);
+               var linenr_filename =
+                       ('file_parent' in commit ? commit.file_parent : commit.filename);
+               a_linenr.href = projectUrl + 'a=blame_incremental' +
+                       ';hb=' + linenr_commit +
+                       ';f='  + encodeURIComponent(linenr_filename) +
+                       '#l' + (group.srcline + i);
+
+               blamedLines++;
+
+               //updateProgressInfo();
+       }
+}
+
+// ----------------------------------------------------------------------
+
+var inProgress = false;   // are we processing response
+
+/**#@+
+ * @constant
+ */
+var sha1Re = /^([0-9a-f]{40}) ([0-9]+) ([0-9]+) ([0-9]+)/;
+var infoRe = /^([a-z-]+) ?(.*)/;
+var endRe  = /^END ?([^ ]*) ?(.*)/;
+/**@-*/
+
+var curCommit = new Commit();
+var curGroup  = {};
+
+var pollTimer = null;
+
+/**
+ * Parse output from 'git blame --incremental [...]', received via
+ * XMLHttpRequest from server (blamedataUrl), and call handleLine
+ * (which updates page) as soon as blame entry is completed.
+ *
+ * @param {String[]} lines: new complete lines from blamedata server
+ *
+ * @globals commits, curCommit, curGroup, t_interval_server, cmds_server
+ * @globals sha1Re, infoRe, endRe
+ */
+function processBlameLines(lines) {
+       var match;
+
+       for (var i = 0, len = lines.length; i < len; i++) {
+
+               if ((match = sha1Re.exec(lines[i]))) {
+                       var sha1 = match[1];
+                       var srcline  = parseInt(match[2], 10);
+                       var resline  = parseInt(match[3], 10);
+                       var numlines = parseInt(match[4], 10);
+
+                       var c = commits[sha1];
+                       if (!c) {
+                               c = new Commit(sha1);
+                               commits[sha1] = c;
+                       }
+                       curCommit = c;
+
+                       curGroup.srcline = srcline;
+                       curGroup.resline = resline;
+                       curGroup.numlines = numlines;
+
+               } else if ((match = infoRe.exec(lines[i]))) {
+                       var info = match[1];
+                       var data = match[2];
+                       switch (info) {
+                       case 'filename':
+                               curCommit.filename = unquote(data);
+                               // 'filename' information terminates the entry
+                               handleLine(curCommit, curGroup);
+                               updateProgressInfo();
+                               break;
+                       case 'author':
+                               curCommit.author = data;
+                               break;
+                       case 'author-time':
+                               curCommit.authorTime = parseInt(data, 10);
+                               break;
+                       case 'author-tz':
+                               curCommit.authorTimezone = data;
+                               break;
+                       case 'previous':
+                               curCommit.nprevious++;
+                               // store only first 'previous' header
+                               if (!'previous' in curCommit) {
+                                       var parts = data.split(' ', 2);
+                                       curCommit.previous    = parts[0];
+                                       curCommit.file_parent = unquote(parts[1]);
+                               }
+                               break;
+                       case 'boundary':
+                               curCommit.boundary = true;
+                               break;
+                       } // end switch
+
+               } else if ((match = endRe.exec(lines[i]))) {
+                       t_interval_server = match[1];
+                       cmds_server = match[2];
+
+               } else if (lines[i] !== '') {
+                       // malformed line
+
+               } // end if (match)
+
+       } // end for (lines)
+}
+
+/**
+ * Process new data and return pointer to end of processed part
+ *
+ * @param {String} unprocessed: new data (from nextReadPos)
+ * @param {Number} nextReadPos: end of last processed data
+ * @return {Number} end of processed data (new value for nextReadPos)
+ */
+function processData(unprocessed, nextReadPos) {
+       var lastLineEnd = unprocessed.lastIndexOf('\n');
+       if (lastLineEnd !== -1) {
+               var lines = unprocessed.substring(0, lastLineEnd).split('\n');
+               nextReadPos += lastLineEnd + 1 /* 1 == '\n'.length */;
+
+               processBlameLines(lines);
+       } // end if
+
+       return nextReadPos;
+}
+
+/**
+ * Handle XMLHttpRequest errors
+ *
+ * @param {XMLHttpRequest} xhr: XMLHttpRequest object
+ *
+ * @globals pollTimer, commits, inProgress
+ */
+function handleError(xhr) {
+       errorInfo('Server error: ' +
+               xhr.status + ' - ' + (xhr.statusText || 'Error contacting server'));
+
+       clearInterval(pollTimer);
+       commits = {}; // free memory
+
+       inProgress = false;
+}
+
+/**
+ * Called after XMLHttpRequest finishes (loads)
+ *
+ * @param {XMLHttpRequest} xhr: XMLHttpRequest object (unused)
+ *
+ * @globals pollTimer, commits, inProgress
+ */
+function responseLoaded(xhr) {
+       clearInterval(pollTimer);
+
+       fixColorsAndGroups();
+       writeTimeInterval();
+       commits = {}; // free memory
+
+       inProgress = false;
+}
+
+/**
+ * handler for XMLHttpRequest onreadystatechange event
+ * @see startBlame
+ *
+ * @globals xhr, inProgress
+ */
+function handleResponse() {
+
+       /*
+        * xhr.readyState
+        *
+        *  Value  Constant (W3C)    Description
+        *  -------------------------------------------------------------------
+        *  0      UNSENT            open() has not been called yet.
+        *  1      OPENED            send() has not been called yet.
+        *  2      HEADERS_RECEIVED  send() has been called, and headers
+        *                           and status are available.
+        *  3      LOADING           Downloading; responseText holds partial data.
+        *  4      DONE              The operation is complete.
+        */
+
+       if (xhr.readyState !== 4 && xhr.readyState !== 3) {
+               return;
+       }
+
+       // the server returned error
+       // try ... catch block is to work around bug in IE8
+       try {
+               if (xhr.readyState === 3 && xhr.status !== 200) {
+                       return;
+               }
+       } catch (e) {
+               return;
+       }
+       if (xhr.readyState === 4 && xhr.status !== 200) {
+               handleError(xhr);
+               return;
+       }
+
+       // In konqueror xhr.responseText is sometimes null here...
+       if (xhr.responseText === null) {
+               return;
+       }
+
+       // in case we were called before finished processing
+       if (inProgress) {
+               return;
+       } else {
+               inProgress = true;
+       }
+
+       // extract new whole (complete) lines, and process them
+       while (xhr.prevDataLength !== xhr.responseText.length) {
+               if (xhr.readyState === 4 &&
+                   xhr.prevDataLength === xhr.responseText.length) {
+                       break;
+               }
+
+               xhr.prevDataLength = xhr.responseText.length;
+               var unprocessed = xhr.responseText.substring(xhr.nextReadPos);
+               xhr.nextReadPos = processData(unprocessed, xhr.nextReadPos);
+       } // end while
+
+       // did we finish work?
+       if (xhr.readyState === 4 &&
+           xhr.prevDataLength === xhr.responseText.length) {
+               responseLoaded(xhr);
+       }
+
+       inProgress = false;
+}
+
+// ============================================================
+// ------------------------------------------------------------
+
+/**
+ * Incrementally update line data in blame_incremental view in gitweb.
+ *
+ * @param {String} blamedataUrl: URL to server script generating blame data.
+ * @param {String} bUrl: partial URL to project, used to generate links.
+ *
+ * Called from 'blame_incremental' view after loading table with
+ * file contents, a base for blame view.
+ *
+ * @globals xhr, t0, projectUrl, div_progress_bar, totalLines, pollTimer
+*/
+function startBlame(blamedataUrl, bUrl) {
+
+       xhr = createRequestObject();
+       if (!xhr) {
+               errorInfo('ERROR: XMLHttpRequest not supported');
+               return;
+       }
+
+       t0 = new Date();
+       projectUrl = bUrl + (bUrl.indexOf('?') === -1 ? '?' : ';');
+       if ((div_progress_bar = document.getElementById('progress_bar'))) {
+               //div_progress_bar.setAttribute('style', 'width: 100%;');
+               div_progress_bar.style.cssText = 'width: 100%;';
+       }
+       totalLines = countLines();
+       updateProgressInfo();
+
+       /* add extra properties to xhr object to help processing response */
+       xhr.prevDataLength = -1;  // used to detect if we have new data
+       xhr.nextReadPos = 0;      // where unread part of response starts
+
+       xhr.onreadystatechange = handleResponse;
+       //xhr.onreadystatechange = function () { handleResponse(xhr); };
+
+       xhr.open('GET', blamedataUrl);
+       xhr.setRequestHeader('Accept', 'text/plain');
+       xhr.send(null);
+
+       // not all browsers call onreadystatechange event on each server flush
+       // poll response using timer every second to handle this issue
+       pollTimer = setInterval(xhr.onreadystatechange, 1000);
+}
+
+/* end of blame_incremental.js */

diff --git a/gitweb/static/js/javascript-detection.js b/gitweb/static/js/javascript-detection.js
new file mode 100644 (file)
index 0000000..93dd2bd
--- /dev/null
+++ b/gitweb/static/js/javascript-detection.js
@@ -0,0 +1,43 @@
+// Copyright (C) 2007, Fredrik Kuivinen <frekui@gmail.com>
+//               2007, Petr Baudis <pasky@suse.cz>
+//          2008-2011, Jakub Narebski <jnareb@gmail.com>
+
+/**
+ * @fileOverview Detect if JavaScript is enabled, and pass it to server-side
+ * @license GPLv2 or later
+ */
+
+
+/* ============================================================ */
+/* Manipulating links */
+
+/**
+ * used to check if link has 'js' query parameter already (at end),
+ * and other reasons to not add 'js=1' param at the end of link
+ * @constant
+ */
+var jsExceptionsRe = /[;?]js=[01]$/;
+
+/**
+ * Add '?js=1' or ';js=1' to the end of every link in the document
+ * that doesn't have 'js' query parameter set already.
+ *
+ * Links with 'js=1' lead to JavaScript version of given action, if it
+ * exists (currently there is only 'blame_incremental' for 'blame')
+ *
+ * To be used as `window.onload` handler
+ *
+ * @globals jsExceptionsRe
+ */
+function fixLinks() {
+       var allLinks = document.getElementsByTagName("a") || document.links;
+       for (var i = 0, len = allLinks.length; i < len; i++) {
+               var link = allLinks[i];
+               if (!jsExceptionsRe.test(link)) { // =~ /[;?]js=[01]$/;
+                       link.href +=
+                               (link.href.indexOf('?') === -1 ? '?' : ';') + 'js=1';
+               }
+       }
+}
+
+/* end of javascript-detection.js */

diff --git a/gitweb/static/js/lib/common-lib.js b/gitweb/static/js/lib/common-lib.js
new file mode 100644 (file)
index 0000000..38f3b9e
--- /dev/null
+++ b/gitweb/static/js/lib/common-lib.js
@@ -0,0 +1,187 @@
+// Copyright (C) 2007, Fredrik Kuivinen <frekui@gmail.com>
+//               2007, Petr Baudis <pasky@suse.cz>
+//          2008-2011, Jakub Narebski <jnareb@gmail.com>
+
+/**
+ * @fileOverview Generic JavaScript code (helper functions)
+ * @license GPLv2 or later
+ */
+
+
+/* ============================================================ */
+/* ............................................................ */
+/* Padding */
+
+/**
+ * pad number N with nonbreakable spaces on the left, to WIDTH characters
+ * example: padLeftStr(12, 3, '\u00A0') == '\u00A012'
+ *          ('\u00A0' is nonbreakable space)
+ *
+ * @param {Number|String} input: number to pad
+ * @param {Number} width: visible width of output
+ * @param {String} str: string to prefix to string, e.g. '\u00A0'
+ * @returns {String} INPUT prefixed with (WIDTH - INPUT.length) x STR
+ */
+function padLeftStr(input, width, str) {
+       var prefix = '';
+
+       width -= input.toString().length;
+       while (width > 0) {
+               prefix += str;
+               width--;
+       }
+       return prefix + input;
+}
+
+/**
+ * Pad INPUT on the left to SIZE width, using given padding character CH,
+ * for example padLeft('a', 3, '_') is '__a'.
+ *
+ * @param {String} input: input value converted to string.
+ * @param {Number} width: desired length of output.
+ * @param {String} ch: single character to prefix to string.
+ *
+ * @returns {String} Modified string, at least SIZE length.
+ */
+function padLeft(input, width, ch) {
+       var s = input + "";
+       while (s.length < width) {
+               s = ch + s;
+       }
+       return s;
+}
+
+
+/* ............................................................ */
+/* Ajax */
+
+/**
+ * Create XMLHttpRequest object in cross-browser way
+ * @returns XMLHttpRequest object, or null
+ */
+function createRequestObject() {
+       try {
+               return new XMLHttpRequest();
+       } catch (e) {}
+       try {
+               return window.createRequest();
+       } catch (e) {}
+       try {
+               return new ActiveXObject("Msxml2.XMLHTTP");
+       } catch (e) {}
+       try {
+               return new ActiveXObject("Microsoft.XMLHTTP");
+       } catch (e) {}
+
+       return null;
+}
+
+
+/* ............................................................ */
+/* time and data */
+
+/**
+ * used to extract hours and minutes from timezone info, e.g '-0900'
+ * @constant
+ */
+var tzRe = /^([+-])([0-9][0-9])([0-9][0-9])$/;
+
+/**
+ * convert numeric timezone +/-ZZZZ to offset from UTC in seconds
+ *
+ * @param {String} timezoneInfo: numeric timezone '(+|-)HHMM'
+ * @returns {Number} offset from UTC in seconds for timezone
+ *
+ * @globals tzRe
+ */
+function timezoneOffset(timezoneInfo) {
+       var match = tzRe.exec(timezoneInfo);
+       var tz_sign = (match[1] === '-' ? -1 : +1);
+       var tz_hour = parseInt(match[2],10);
+       var tz_min  = parseInt(match[3],10);
+
+       return tz_sign*(((tz_hour*60) + tz_min)*60);
+}
+
+/**
+ * return date in local time formatted in iso-8601 like format
+ * 'yyyy-mm-dd HH:MM:SS +/-ZZZZ' e.g. '2005-08-07 21:49:46 +0200'
+ *
+ * @param {Number} epoch: seconds since '00:00:00 1970-01-01 UTC'
+ * @param {String} timezoneInfo: numeric timezone '(+|-)HHMM'
+ * @returns {String} date in local time in iso-8601 like format
+ */
+function formatDateISOLocal(epoch, timezoneInfo) {
+       // date corrected by timezone
+       var localDate = new Date(1000 * (epoch +
+               timezoneOffset(timezoneInfo)));
+       var localDateStr = // e.g. '2005-08-07'
+               localDate.getUTCFullYear()                 + '-' +
+               padLeft(localDate.getUTCMonth()+1, 2, '0') + '-' +
+               padLeft(localDate.getUTCDate(),    2, '0');
+       var localTimeStr = // e.g. '21:49:46'
+               padLeft(localDate.getUTCHours(),   2, '0') + ':' +
+               padLeft(localDate.getUTCMinutes(), 2, '0') + ':' +
+               padLeft(localDate.getUTCSeconds(), 2, '0');
+
+       return localDateStr + ' ' + localTimeStr + ' ' + timezoneInfo;
+}
+
+
+/* ............................................................ */
+/* unquoting/unescaping filenames */
+
+/**#@+
+ * @constant
+ */
+var escCodeRe = /\\([^0-7]|[0-7]{1,3})/g;
+var octEscRe = /^[0-7]{1,3}$/;
+var maybeQuotedRe = /^\"(.*)\"$/;
+/**#@-*/
+
+/**
+ * unquote maybe git-quoted filename
+ * e.g. 'aa' -> 'aa', '"a\ta"' -> 'a   a'
+ *
+ * @param {String} str: git-quoted string
+ * @returns {String} Unquoted and unescaped string
+ *
+ * @globals escCodeRe, octEscRe, maybeQuotedRe
+ */
+function unquote(str) {
+       function unq(seq) {
+               var es = {
+                       // character escape codes, aka escape sequences (from C)
+                       // replacements are to some extent JavaScript specific
+                       t: "\t",   // tab            (HT, TAB)
+                       n: "\n",   // newline        (NL)
+                       r: "\r",   // return         (CR)
+                       f: "\f",   // form feed      (FF)
+                       b: "\b",   // backspace      (BS)
+                       a: "\x07", // alarm (bell)   (BEL)
+                       e: "\x1B", // escape         (ESC)
+                       v: "\v"    // vertical tab   (VT)
+               };
+
+               if (seq.search(octEscRe) !== -1) {
+                       // octal char sequence
+                       return String.fromCharCode(parseInt(seq, 8));
+               } else if (seq in es) {
+                       // C escape sequence, aka character escape code
+                       return es[seq];
+               }
+               // quoted ordinary character
+               return seq;
+       }
+
+       var match = str.match(maybeQuotedRe);
+       if (match) {
+               str = match[1];
+               // perhaps str = eval('"'+str+'"'); would be enough?
+               str = str.replace(escCodeRe,
+                       function (substr, p1, offset, s) { return unq(p1); });
+       }
+       return str;
+}
+
+/* end of common-lib.js */