GTK Themes: A gtkrc file can now override our choice of frame color by

chrome/browser/gtk/gtk_theme_provider.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/gtk/gtk_theme_provider.h"
 
 #include <gtk/gtk.h>
 
 #include "base/gfx/gtk_util.h"
 #include "chrome/browser/metrics/user_metrics.h"
@@ skipping 10 matching lines @@
 #include "third_party/skia/include/core/SkColor.h"
 
 namespace {
 
 // The size of the rendered toolbar image.
 const int kToolbarImageWidth = 64;
 const int kToolbarImageHeight = 128;
 
 const skia::HSL kExactColor = { -1, -1, -1 };
 
+const skia::HSL kDefaultFrameShift = { -1, -1, 0.4 };
+
 }  // namespace
 
 // static
 GtkThemeProvider* GtkThemeProvider::GetFrom(Profile* profile) {
   return static_cast<GtkThemeProvider*>(profile->GetThemeProvider());
 }
 
 GtkThemeProvider::GtkThemeProvider()
     : BrowserThemeProvider(),
       fake_window_(gtk_window_new(GTK_WINDOW_TOPLEVEL)) {
@@ skipping 123 matching lines @@
     provider->ClearAllThemeData();
     provider->LoadGtkValues();
     provider->NotifyThemeChanged();
   }
 }
 
 void GtkThemeProvider::LoadGtkValues() {
   GtkStyle* window_style = gtk_rc_get_style(fake_window_);
   GtkStyle* label_style = gtk_rc_get_style(fake_label_.get());
 
-  SetThemeColorFromGtk(kColorFrame, &window_style->bg[GTK_STATE_SELECTED]);
+  GdkColor frame_color = window_style->bg[GTK_STATE_SELECTED];
+  GdkColor inactive_frame_color = window_style->bg[GTK_STATE_INSENSITIVE];
+  GdkColor button_color = window_style->bg[GTK_STATE_SELECTED];
+
+  GtkSettings* settings = gtk_settings_get_default();
+  bool theme_has_frame_color = false;
+  if (settings) {
+    GHashTable* color_scheme = NULL;
+    g_object_get(settings, "color-hash", &color_scheme, NULL);
+
+    if (color_scheme) {
+      // If we have a "gtk-color-scheme" set in this theme, mine it for hints
+      // about what we should actually set the frame color to.
+      GdkColor* color = NULL;
+      if ((color = static_cast<GdkColor*>(
+          g_hash_table_lookup(color_scheme, "frame_color")))) {
+        frame_color = *color;
+        theme_has_frame_color = true;
+      }
+
+      if ((color = static_cast<GdkColor*>(
+          g_hash_table_lookup(color_scheme, "inactive_frame_color")))) {
+        inactive_frame_color = *color;
+      }
+    }
+  }
+
+  if (!theme_has_frame_color) {
+    // If the theme's gtkrc doesn't explicitly tell us to use a specific frame
+    // color, change the luminosity of the frame color downwards to 80% of what
+    // it currently is. This is in a futile attempt to match the default
+    // metacity and xfwm themes.
+    SkColor shifted =
+        skia::HSLShift(SkColorSetRGB((frame_color.red >> 8),
+                                     (frame_color.green >> 8),
+                                     (frame_color.blue >> 8)),
+                       kDefaultFrameShift);
+    frame_color.pixel = 0;
+    frame_color.red = SkColorGetR(shifted) * kSkiaToGDKMultiplier;
+    frame_color.green = SkColorGetG(shifted) * kSkiaToGDKMultiplier;
+    frame_color.blue = SkColorGetB(shifted) * kSkiaToGDKMultiplier;
+  }
+
+  SetThemeColorFromGtk(kColorFrame, &frame_color);
   // Skip COLOR_FRAME_INACTIVE and the incognito colors, as they will be
   // autogenerated from tints.
   SetThemeColorFromGtk(kColorToolbar,
                        &window_style->bg[GTK_STATE_NORMAL]);
   SetThemeColorFromGtk(kColorTabText,
                        &label_style->text[GTK_STATE_NORMAL]);
   SetThemeColorFromGtk(kColorBackgroundTabText,
                        &label_style->text[GTK_STATE_NORMAL]);
   SetThemeColorFromGtk(kColorBookmarkText,
                        &label_style->text[GTK_STATE_NORMAL]);
   SetThemeColorFromGtk(kColorControlBackground,
                        &window_style->bg[GTK_STATE_NORMAL]);
   SetThemeColorFromGtk(kColorButtonBackground,
                        &window_style->bg[GTK_STATE_NORMAL]);
 
-  SetThemeTintFromGtk(kTintButtons, &window_style->bg[GTK_STATE_SELECTED],
+  SetThemeTintFromGtk(kTintButtons, &button_color,
                       kDefaultTintButtons);
-  SetThemeTintFromGtk(kTintFrame, &window_style->bg[GTK_STATE_SELECTED],
+  SetThemeTintFromGtk(kTintFrame, &frame_color,
                       kDefaultTintFrame);
   SetThemeTintFromGtk(kTintFrameIncognito,
-                      &window_style->bg[GTK_STATE_SELECTED],
+                      &frame_color,
                       kDefaultTintFrameIncognito);
   SetThemeTintFromGtk(kTintBackgroundTab,
-                      &window_style->bg[GTK_STATE_SELECTED],
+                      &frame_color,
                       kDefaultTintBackgroundTab);
 
   // The inactive color/tint is special: We *must* use the exact insensitive
   // color for all inactive windows, otherwise we end up neon pink half the
   // time.
-  SetThemeColorFromGtk(kColorFrameInactive,
-                       &window_style->bg[GTK_STATE_INSENSITIVE]);
-  SetThemeTintFromGtk(kTintFrameInactive,
-                      &window_style->bg[GTK_STATE_INSENSITIVE],
+  SetThemeColorFromGtk(kColorFrameInactive, &inactive_frame_color);
+  SetThemeTintFromGtk(kTintFrameInactive, &inactive_frame_color,
                       kExactColor);
-  SetThemeTintFromGtk(kTintFrameIncognitoInactive,
-                      &window_style->bg[GTK_STATE_INSENSITIVE],
+  SetThemeTintFromGtk(kTintFrameIncognitoInactive, &inactive_frame_color,
                       kExactColor);
 
   GenerateFrameColors();
   GenerateFrameImages();
 }
 
 void GtkThemeProvider::SetThemeColorFromGtk(const char* id, GdkColor* color) {
   SetColor(id, SkColorSetRGB(color->red >> 8,
                              color->green >> 8,
                              color->blue >> 8));
@@ skipping 14 matching lines @@
 }
 
 void GtkThemeProvider::OnDestroyChromeButton(GtkWidget* button,
                                              GtkThemeProvider* provider) {
   std::vector<GtkWidget*>::iterator it =
       find(provider->chrome_buttons_.begin(), provider->chrome_buttons_.end(),
            button);
   if (it != provider->chrome_buttons_.end())
     provider->chrome_buttons_.erase(it);
 }