File firefox-fix-set-background.patch of Package MozillaFirefox

# HG changeset patch
# User Christopher A. Aillon <caillon@redhat.com>
# Date 1220868392 -7200
# Node ID 6860b99699e91ba230b0277b889a498ea029ea40
# Parent  ef557ac7be736857b4cd2ed11cbac2f27acd84cc
Bug 421977 - nsGNOMEShellService::GetDesktopBackgroundColor should support GConf's actual format. r=gavin

diff -r ef557ac7be73 -r 6860b99699e9 browser/components/shell/src/nsGNOMEShellService.cpp
--- a/browser/components/shell/src/nsGNOMEShellService.cpp	Mon Sep 08 11:47:12 2008 +0200
+++ b/browser/components/shell/src/nsGNOMEShellService.cpp	Mon Sep 08 12:06:32 2008 +0200
@@ -63,6 +63,8 @@
 
 #include <glib.h>
 #include <glib-object.h>
+#include <gtk/gtkversion.h>
+#include <gdk/gdk.h>
 #include <gdk-pixbuf/gdk-pixbuf.h>
 #include <limits.h>
 #include <stdlib.h>
@@ -446,58 +448,8 @@
   return rv;
 }
 
-// In: pointer to two characters CC
-// Out: parsed color number
-static PRUint8
-HexToNum(char ch)
-{
-  if ('0' <= ch && '9' >= ch)
-    return ch - '0';
-
-  if ('A' <= ch && 'F' >= ch)
-    return ch - 'A';
-
-  if ('a' <= ch && 'f' >= ch)
-    return ch - 'a';
-
-  return 0;
-}
-  
-
-// In: 3 or 6-character RRGGBB hex string
-// Out: component colors
-static PRBool
-HexToRGB(const nsCString& aColorSpec,
-         PRUint8 &aRed,
-         PRUint8 &aGreen,
-         PRUint8 &aBlue)
-{
-  const char *buf = aColorSpec.get();
-
-  if (aColorSpec.Length() == 6) {
-    aRed =    HexToNum(buf[0]) >> 4 |
-              HexToNum(buf[1]);
-    aGreen =  HexToNum(buf[2]) >> 4 |
-              HexToNum(buf[3]);
-    aBlue =   HexToNum(buf[4]) >> 4 |
-              HexToNum(buf[5]);
-    return PR_TRUE;
-  }
-
-  if (aColorSpec.Length() == 3) {
-    aRed = HexToNum(buf[0]);
-    aGreen = HexToNum(buf[1]);
-    aBlue = HexToNum(buf[2]);
-
-    aRed |= aRed >> 4;
-    aGreen |= aGreen >> 4;
-    aBlue |= aBlue >> 4;
-
-    return PR_TRUE;
-  }
-
-  return PR_FALSE;
-}
+#define COLOR_16_TO_8_BIT(_c) ((_c) >> 8)
+#define COLOR_8_TO_16_BIT(_c) ((_c) << 8)
 
 NS_IMETHODIMP
 nsGNOMEShellService::GetDesktopBackgroundColor(PRUint32 *aColor)
@@ -512,22 +464,34 @@
     return NS_OK;
   }
 
-  // Chop off the leading '#' character
-  background.Cut(0, 1);
+  GdkColor color;
+  gboolean success = gdk_color_parse(background.get(), &color);
 
-  PRUint8 red, green, blue;
-  if (!HexToRGB(background, red, green, blue))
-      return NS_ERROR_FAILURE;
+  NS_ENSURE_TRUE(success, NS_ERROR_FAILURE);
 
-  // The result must be in RGB order with the high 8 bits zero.
-  *aColor = (red << 16 | green << 8  | blue);
+  *aColor = COLOR_16_TO_8_BIT(color.red) << 16 |
+            COLOR_16_TO_8_BIT(color.green) << 8 |
+            COLOR_16_TO_8_BIT(color.blue);
   return NS_OK;
 }
 
 static void
-ColorToHex(PRUint32 aColor, nsCString& aResult)
+ColorToCString(PRUint32 aColor, nsCString& aResult)
 {
-  char *buf = aResult.BeginWriting(7);
+#if GTK_CHECK_VERSION(2,12,0)
+  GdkColor color;
+  color.red = COLOR_8_TO_16_BIT(aColor >> 16);
+  color.green = COLOR_8_TO_16_BIT((aColor >> 8) & 0xff);
+  color.blue = COLOR_8_TO_16_BIT(aColor & 0xff);
+
+  gchar *colorString = gdk_color_to_string(&color);
+  aResult.Assign(colorString);
+  g_free(colorString);
+
+#else // GTK 2.12.0
+
+  // The #rrrrggggbbbb format is used to match gdk_color_to_string()
+  char *buf = aResult.BeginWriting(13);
   if (!buf)
     return;
 
@@ -535,7 +499,8 @@
   PRUint8 green = (aColor >> 8) & 0xff;
   PRUint8 blue = aColor & 0xff;
 
-  PR_snprintf(buf, 8, "#%02x%02x%02x", red, green, blue);
+  PR_snprintf(buf, 14, "#%02x00%02x00%02x00", red, green, blue);
+#endif // GTK 2.12.0
 }
 
 NS_IMETHODIMP
@@ -544,7 +509,7 @@
   nsCOMPtr<nsIGConfService> gconf = do_GetService(NS_GCONFSERVICE_CONTRACTID);
 
   nsCString colorString;
-  ColorToHex(aColor, colorString);
+  ColorToCString(aColor, colorString);
 
   gconf->SetString(NS_LITERAL_CSTRING(kDesktopColorKey), colorString);
 
diff -r ef557ac7be73 -r 6860b99699e9 browser/components/shell/test/Makefile.in
--- a/browser/components/shell/test/Makefile.in	Mon Sep 08 11:47:12 2008 +0200
+++ b/browser/components/shell/test/Makefile.in	Mon Sep 08 12:06:32 2008 +0200
@@ -42,6 +42,9 @@
 
 include $(DEPTH)/config/autoconf.mk
 
+MODULE		= test_browser_shell
+XPCSHELL_TESTS	= unit
+
 include $(topsrcdir)/config/rules.mk
 
 _BROWSER_TEST_FILES = browser_420786.js \
diff -r ef557ac7be73 -r 6860b99699e9 browser/components/shell/test/unit/test_421977.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/components/shell/test/unit/test_421977.js	Mon Sep 08 12:06:32 2008 +0200
@@ -0,0 +1,114 @@
+const Cc = Components.classes;
+const Ci = Components.interfaces;
+const Cr = Components.results;
+
+const GCONF_BG_COLOR_KEY = "/desktop/gnome/background/primary_color";
+
+var gShell;
+var gGConf;
+
+/**
+ * Converts from a rgb numerical color valule (r << 16 | g << 8 | b)
+ * into a hex string in #RRGGBB format.
+ */
+function colorToHex(aColor) {
+  const rMask = 4294901760;
+  const gMask = 65280;
+  const bMask = 255;
+
+  var r = (aColor & rMask) >> 16;
+  var g = (aColor & gMask) >> 8;
+  var b = (aColor & bMask);
+
+  return "#" + [r, g, b].map(function(aInt)
+                              aInt.toString(16).replace(/^(.)$/, "0$1"))
+                             .join("").toUpperCase();
+}
+
+/**
+ * Converts a color string in #RRGGBB format to a rgb numerical color value
+ *  (r << 16 | g << 8 | b).
+ */
+function hexToColor(aString) {
+  return parseInt(aString.substring(1,3), 16) << 16 |
+         parseInt(aString.substring(3,5), 16) << 8 |
+         parseInt(aString.substring(5,7), 16);
+}
+
+/**
+ * Checks that setting the GConf background key to aGConfColor will
+ * result in the Shell component returning a background color equals
+ * to aExpectedShellColor in #RRGGBB format.
+ */
+function checkGConfToShellColor(aGConfColor, aExpectedShellColor) {
+
+  gGConf.setString(GCONF_BG_COLOR_KEY, aGConfColor);
+  var shellColor = colorToHex(gShell.desktopBackgroundColor);
+
+  do_check_eq(shellColor, aExpectedShellColor);
+}
+
+/**
+ * Checks that setting the background color (in #RRGGBB format) using the Shell
+ * component will result in having a GConf key for the background color set to
+ * aExpectedGConfColor.
+ */
+function checkShellToGConfColor(aShellColor, aExpectedGConfColor) {
+
+  gShell.desktopBackgroundColor = hexToColor(aShellColor);
+  var gconfColor = gGConf.getString(GCONF_BG_COLOR_KEY);
+
+  do_check_eq(gconfColor, aExpectedGConfColor);
+}
+
+function run_test() {
+
+  // This test is Linux specific for now
+  if (!("@mozilla.org/gnome-gconf-service;1" in Cc))
+    return;
+
+  gGConf = Cc["@mozilla.org/gnome-gconf-service;1"].
+           getService(Ci.nsIGConfService);
+
+  gShell = Cc["@mozilla.org/browser/shell-service;1"].
+           getService(Ci.nsIShellService);
+
+  // Save the original background color so that we can restore it
+  // after the test.
+  var origGConfColor = gGConf.getString(GCONF_BG_COLOR_KEY);
+
+  try {
+
+    checkGConfToShellColor("#000", "#000000");
+    checkGConfToShellColor("#00f", "#0000FF");
+    checkGConfToShellColor("#b2f", "#BB22FF");
+    checkGConfToShellColor("#fff", "#FFFFFF");
+
+    checkGConfToShellColor("#000000", "#000000");
+    checkGConfToShellColor("#0000ff", "#0000FF");
+    checkGConfToShellColor("#b002f0", "#B002F0");
+    checkGConfToShellColor("#ffffff", "#FFFFFF");
+
+    checkGConfToShellColor("#000000000", "#000000");
+    checkGConfToShellColor("#00f00f00f", "#000000");
+    checkGConfToShellColor("#aaabbbccc", "#AABBCC");
+    checkGConfToShellColor("#fffffffff", "#FFFFFF");
+
+    checkGConfToShellColor("#000000000000", "#000000");
+    checkGConfToShellColor("#000f000f000f", "#000000");
+    checkGConfToShellColor("#00ff00ff00ff", "#000000");
+    checkGConfToShellColor("#aaaabbbbcccc", "#AABBCC");
+    checkGConfToShellColor("#111122223333", "#112233");
+    checkGConfToShellColor("#ffffffffffff", "#FFFFFF");
+
+    checkShellToGConfColor("#000000", "#000000000000");
+    checkShellToGConfColor("#0000FF", "#00000000ff00");
+    checkShellToGConfColor("#FFFFFF", "#ff00ff00ff00");
+    checkShellToGConfColor("#0A0B0C", "#0a000b000c00");
+    checkShellToGConfColor("#A0B0C0", "#a000b000c000");
+    checkShellToGConfColor("#AABBCC", "#aa00bb00cc00");
+
+  } finally {
+    gGConf.setString(GCONF_BG_COLOR_KEY, origGConfColor);
+  }
+}