Linux: Pass font settings through to interstitial renderers.

BUG=18483
TESTED=restarted and visited a page with a broken SSL cert a few times while changing font settings via gnome-appearance-properties

Review URL: http://codereview.chromium.org/164094

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@22679 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 56 insertions, 0 deletions

diff --git a/chrome/common/gtk_util.cc b/chrome/common/gtk_util.cc
index 6e0d733..08658a7 100644
--- a/chrome/common/gtk_util.cc
+++ b/chrome/common/gtk_util.cc
@@ -13,6 +13,7 @@
 #include "app/resource_bundle.h"
 #include "base/linux_util.h"
 #include "base/logging.h"
+#include "chrome/common/renderer_preferences.h"
 #include "grit/theme_resources.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
@@ -432,4 +433,59 @@ GtkWidget* IndentWidget(GtkWidget* content) {
   return content_alignment;
 }
 
+void InitRendererPrefsFromGtkSettings(RendererPreferences* prefs) {
+  DCHECK(prefs);
+
+  gint antialias = 0;
+  gint hinting = 0;
+  gchar* hint_style = NULL;
+  gchar* rgba_style = NULL;
+  g_object_get(gtk_settings_get_default(),
+               "gtk-xft-antialias", &antialias,
+               "gtk-xft-hinting", &hinting,
+               "gtk-xft-hintstyle", &hint_style,
+               "gtk-xft-rgba", &rgba_style,
+               NULL);
+
+  // Set some reasonable defaults.
+  prefs->should_antialias_text = true;
+  prefs->hinting = RENDERER_PREFERENCES_HINTING_SYSTEM_DEFAULT;
+  prefs->subpixel_rendering =
+      RENDERER_PREFERENCES_SUBPIXEL_RENDERING_SYSTEM_DEFAULT;
+
+  // g_object_get() doesn't tell us whether the properties were present or not,
+  // but if they aren't (because gnome-settings-daemon isn't running), we'll get
+  // NULL values for the strings.
+  if (hint_style && rgba_style) {
+    prefs->should_antialias_text = antialias;
+
+    if (hinting == 0 || strcmp(hint_style, "hintnone") == 0) {
+      prefs->hinting = RENDERER_PREFERENCES_HINTING_NONE;
+    } else if (strcmp(hint_style, "hintslight") == 0) {
+      prefs->hinting = RENDERER_PREFERENCES_HINTING_SLIGHT;
+    } else if (strcmp(hint_style, "hintmedium") == 0) {
+      prefs->hinting = RENDERER_PREFERENCES_HINTING_MEDIUM;
+    } else if (strcmp(hint_style, "hintfull") == 0) {
+      prefs->hinting = RENDERER_PREFERENCES_HINTING_FULL;
+    }
+
+    if (strcmp(rgba_style, "none") == 0) {
+      prefs->subpixel_rendering = RENDERER_PREFERENCES_SUBPIXEL_RENDERING_NONE;
+    } else if (strcmp(rgba_style, "rgb") == 0) {
+      prefs->subpixel_rendering = RENDERER_PREFERENCES_SUBPIXEL_RENDERING_RGB;
+    } else if (strcmp(rgba_style, "bgr") == 0) {
+      prefs->subpixel_rendering = RENDERER_PREFERENCES_SUBPIXEL_RENDERING_BGR;
+    } else if (strcmp(rgba_style, "vrgb") == 0) {
+      prefs->subpixel_rendering = RENDERER_PREFERENCES_SUBPIXEL_RENDERING_VRGB;
+    } else if (strcmp(rgba_style, "vbgr") == 0) {
+      prefs->subpixel_rendering = RENDERER_PREFERENCES_SUBPIXEL_RENDERING_VBGR;
+    }
+  }
+
+  if (hint_style)
+    g_free(hint_style);
+  if (rgba_style)
+    g_free(rgba_style);
+}
+
 }  // namespace gtk_util