From 9b345c2b3f6d12935f9d2e023543f84e4eb449d9 Mon Sep 17 00:00:00 2001
From: oetiker <oetiker@a5681a0c-68f1-0310-ab6d-d61299d08faa>
Date: Sun, 18 May 2008 22:11:56 +0000
Subject: [PATCH] * document tabwidth option * fix \t -> tab expansion

git-svn-id: svn://svn.oetiker.ch/rrdtool/trunk@1371 a5681a0c-68f1-0310-ab6d-d61299d08faa
---
 program/src/rrd_gfx.c   | 10 ++--------
 program/src/rrd_graph.c | 12 ++++++++----
 program/src/rrd_tool.c  |  1 +
 3 files changed, 11 insertions(+), 12 deletions(-)

diff --git a/program/src/rrd_gfx.c b/program/src/rrd_gfx.c
index 7ba93ca7..5e5072d2 100644
--- a/program/src/rrd_gfx.c
+++ b/program/src/rrd_gfx.c
@@ -131,6 +131,7 @@ static PangoLayout *gfx_prep_text(
     long      i;
     long      tab_count = strlen(text);
     long      tab_shift = fmod(x, tabwidth);
+    int       border = im->text_prop[TEXT_PROP_LEGEND].size * 2.0;
 
     PangoTabArray *tab_array;
     PangoContext *pango_context;
@@ -138,7 +139,7 @@ static PangoLayout *gfx_prep_text(
     tab_array = pango_tab_array_new(tab_count, (gboolean) (1));
     for (i = 1; i <= tab_count; i++) {
         pango_tab_array_set_tab(tab_array,
-                                i, PANGO_TAB_LEFT, tabwidth * i - tab_shift);
+                                i, PANGO_TAB_LEFT, tabwidth * i - tab_shift+border);
     }
     cairo_new_path(cr);
     cairo_set_source_rgba(cr, color.red, color.green, color.blue,
@@ -170,13 +171,6 @@ double gfx_get_text_width(
     PangoLayout *layout;
     PangoRectangle log_rect;
     gfx_color_t color = { 0, 0, 0, 0 };
-    char     *tab;
-
-    /* turn \\t into tab */
-    while ((tab = strstr(text, "\\t"))) {
-        memmove(tab + 1, tab + 2, strlen(tab + 2));
-        tab[0] = (char) 9;
-    }
     layout = gfx_prep_text(im, start, color, font, size, tabwidth, text);
     pango_layout_get_pixel_extents(layout, NULL, &log_rect);
     pango_tab_array_free(pango_layout_get_tabs(layout));
diff --git a/program/src/rrd_graph.c b/program/src/rrd_graph.c
index a0e3ddc3..eae4c3db 100644
--- a/program/src/rrd_graph.c
+++ b/program/src/rrd_graph.c
@@ -1620,6 +1620,7 @@ int leg_place(
     char      prt_fctn; /*special printfunctions */
     char      default_txtalign = TXA_JUSTIFIED; /*default line orientation */
     int      *legspace;
+    char     *tab;
 
     if (!(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH)) {
         if ((legspace = malloc(im->gdes_c * sizeof(int))) == NULL) {
@@ -1648,13 +1649,16 @@ int leg_place(
                     im->gdes[i].legend[0] = '\0';
             }
 
+            /* turn \\t into tab */
+            while ((tab = strstr(im->gdes[i].legend, "\\t"))) {
+                memmove(tab, tab + 1, strlen(tab));
+                tab[0] = (char) 9;
+            }
             leg_cc = strlen(im->gdes[i].legend);
             /* is there a controle code ant the end of the legend string ? */
-            /* and it is not a tab \\t */
             if (leg_cc >= 2
                 && im->gdes[i].legend[leg_cc -
-                                      2] == '\\'
-                && im->gdes[i].legend[leg_cc - 1] != 't') {
+                                      2] == '\\' ) {
                 prt_fctn = im->gdes[i].legend[leg_cc - 1];
                 leg_cc -= 2;
                 im->gdes[i].legend[leg_cc] = '\0';
@@ -1667,7 +1671,7 @@ int leg_place(
                 prt_fctn != 'j' &&
                 prt_fctn != 'c' &&
                 prt_fctn != 's' &&
-                prt_fctn != 't' && prt_fctn != '\0' && prt_fctn != 'g') {
+                prt_fctn != '\0' && prt_fctn != 'g') {
                 free(legspace);
                 rrd_set_error
                     ("Unknown control code at the end of '%s\\%c'",
diff --git a/program/src/rrd_tool.c b/program/src/rrd_tool.c
index b594a5f4..169631c1 100644
--- a/program/src/rrd_tool.c
+++ b/program/src/rrd_tool.c
@@ -141,6 +141,7 @@ void PrintUsage(
            "\t\t[-M|--alt-autoscale-max]\n"
            "\t\t[-R|--font-render-mode {normal,light,mono}]\n"
            "\t\t[-B|--font-smoothing-threshold size]\n"
+           "\t\t[-T|--tabwidth width]\n"
            "\t\t[-E|--slope-mode]\n"
            "\t\t[-N|--no-gridfit]\n"
            "\t\t[-X|--units-exponent value]\n"
-- 
2.30.2