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chrome/browser/ui/libgtk2ui/gtk2_util.cc

 // Copyright (c) 2012 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/ui/libgtk2ui/gtk2_util.h"
 
 #include <gtk/gtk.h>
 
 #include "base/command_line.h"
 #include "base/environment.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "skia/ext/platform_canvas.h"
 #include "third_party/skia/include/core/SkBitmap.h"
+#include "third_party/skia/include/core/SkUnPreMultiply.h"
+#include "ui/base/accelerators/accelerator.h"
+#include "ui/base/events/event_constants.h"
+#include "ui/base/keycodes/keyboard_code_conversion_x.cc"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/size.h"
 
 namespace {
 
 void CommonInitFromCommandLine(const CommandLine& command_line,
                                void (*init_func)(gint*, gchar***)) {
   const std::vector<std::string>& args = command_line.argv();
   int argc = args.size();
   scoped_ptr<char *[]> argv(new char *[argc + 1]);
   for (size_t i = 0; i < args.size(); ++i) {
     // TODO(piman@google.com): can gtk_init modify argv? Just being safe
     // here.
     argv[i] = strdup(args[i].c_str());
   }
   argv[argc] = NULL;
   char **argv_pointer = argv.get();
 
   init_func(&argc, &argv_pointer);
   for (size_t i = 0; i < args.size(); ++i) {
     free(argv[i]);
   }
 }
 
+// Replaces all ampersands (as used in our grd files to indicate mnemonics)
+// to |target|, except ampersands appearing in pairs which are replaced by
+// a single ampersand. Any underscores get replaced with two underscores as
+// is needed by GTK.
+std::string ConvertAmpersandsTo(const std::string& label,
+                                const std::string& target) {
+  std::string ret;
+  ret.reserve(label.length() * 2);
+  for (size_t i = 0; i < label.length(); ++i) {
+    if ('_' == label[i]) {
+      ret.push_back('_');
+      ret.push_back('_');
+    } else if ('&' == label[i]) {
+      if (i + 1 < label.length() && '&' == label[i + 1]) {
+        ret.push_back('&');
+        ++i;
+      } else {
+        ret.append(target);
+      }
+    } else {
+      ret.push_back(label[i]);
+    }
+  }
+
+  return ret;
+}
+
 }  // namespace
 
 namespace libgtk2ui {
 
 void GtkInitFromCommandLine(const CommandLine& command_line) {
   CommonInitFromCommandLine(command_line, gtk_init);
 }
 
 // TODO(erg): This method was copied out of shell_integration_linux.cc. Because
 // of how this library is structured as a stand alone .so, we can't call code
 // from browser and above.
 std::string GetDesktopName(base::Environment* env) {
 #if defined(GOOGLE_CHROME_BUILD)
   return "google-chrome.desktop";
 #else  // CHROMIUM_BUILD
   // Allow $CHROME_DESKTOP to override the built-in value, so that development
   // versions can set themselves as the default without interfering with
   // non-official, packaged versions using the built-in value.
   std::string name;
   if (env->GetVar("CHROME_DESKTOP", &name) && !name.empty())
     return name;
   return "chromium-browser.desktop";
 #endif
 }
 
 const SkBitmap GdkPixbufToImageSkia(GdkPixbuf* pixbuf) {

[sidharthms, 2013/07/11 05:15:12]

Should I move this one to skia_utils_gtk2 too?

[Elliot Glaysher, 2013/07/11 21:35:08]

I totally missed this. Yes.

[sidharthms, 2013/07/12 01:12:15]

Done.

   // TODO(erg): What do we do in the case where the pixbuf fails these dchecks?
   // I would prefer to use our gtk based canvas, but that would require
   // recompiling half of our skia extensions with gtk support, which we can't
   // do in this build.
   DCHECK_EQ(GDK_COLORSPACE_RGB, gdk_pixbuf_get_colorspace(pixbuf));
 
   int n_channels = gdk_pixbuf_get_n_channels(pixbuf);
   int w = gdk_pixbuf_get_width(pixbuf);
   int h = gdk_pixbuf_get_height(pixbuf);
 
@@ skipping 35 matching lines @@
         skia_data[y * w + x] = SkPreMultiplyARGB(255, red, green, blue);
       }
     }
   } else {
     NOTREACHED();
   }
 
   return ret;
 }
 
+GdkPixbuf* GdkPixbufFromSkBitmap(const SkBitmap& bitmap) {

[Elliot Glaysher, 2013/07/10 22:55:03]

For organizational purposes, please put this in skia_utils_gtk2.{cc,h}.

[sidharthms, 2013/07/11 05:15:12]

Done.

+  if (bitmap.isNull())
+    return NULL;
+
+  SkAutoLockPixels lock_pixels(bitmap);
+
+  int width = bitmap.width();
+  int height = bitmap.height();
+
+  GdkPixbuf* pixbuf =
+      gdk_pixbuf_new(GDK_COLORSPACE_RGB,  // The only colorspace gtk supports.
+                     TRUE,                // There is an alpha channel.
+                     8,
+                     width,
+                     height);
+
+  // SkBitmaps are premultiplied, we need to unpremultiply them.
+  const int kBytesPerPixel = 4;
+  uint8* divided = gdk_pixbuf_get_pixels(pixbuf);
+
+  for (int y = 0, i = 0; y < height; y++) {
+    for (int x = 0; x < width; x++) {
+      uint32 pixel = bitmap.getAddr32(0, y)[x];
+
+      int alpha = SkColorGetA(pixel);
+      if (alpha != 0 && alpha != 255) {
+        SkColor unmultiplied = SkUnPreMultiply::PMColorToColor(pixel);
+        divided[i + 0] = SkColorGetR(unmultiplied);
+        divided[i + 1] = SkColorGetG(unmultiplied);
+        divided[i + 2] = SkColorGetB(unmultiplied);
+        divided[i + 3] = alpha;
+      } else {
+        divided[i + 0] = SkColorGetR(pixel);
+        divided[i + 1] = SkColorGetG(pixel);
+        divided[i + 2] = SkColorGetB(pixel);
+        divided[i + 3] = alpha;
+      }
+      i += kBytesPerPixel;
+    }
+  }
+
+  return pixbuf;
+}
+
+void SetAlwaysShowImage(GtkWidget* image_menu_item) {
+  gtk_image_menu_item_set_always_show_image(
+      GTK_IMAGE_MENU_ITEM(image_menu_item), TRUE);
+}
+
+std::string ConvertAcceleratorsFromWindowsStyle(const std::string& label) {
+  return ConvertAmpersandsTo(label, "_");
+}
+
+guint GetGdkKeyCodeForAccelerator(const ui::Accelerator& accelerator) {
+  // The second parameter is false because accelerator keys are expressed in
+  // terms of the non-shift-modified key.
+  return XKeysymForWindowsKeyCode(accelerator.key_code(), false);
+}
+
+GdkModifierType GetGdkModifierForAccelerator(
+    const ui::Accelerator& accelerator) {
+  int event_flag = accelerator.modifiers();
+  int modifier = 0;
+  if (event_flag & ui::EF_SHIFT_DOWN)
+    modifier |= GDK_SHIFT_MASK;
+  if (event_flag & ui::EF_CONTROL_DOWN)
+    modifier |= GDK_CONTROL_MASK;
+  if (event_flag & ui::EF_ALT_DOWN)
+    modifier |= GDK_MOD1_MASK;
+  return static_cast<GdkModifierType>(modifier);
+}
+
+int EventFlagsFromGdkState(guint state) {
+  int flags = ui::EF_NONE;
+  flags |= (state & GDK_LOCK_MASK) ? ui::EF_CAPS_LOCK_DOWN : ui::EF_NONE;
+  flags |= (state & GDK_CONTROL_MASK) ? ui::EF_CONTROL_DOWN : ui::EF_NONE;
+  flags |= (state & GDK_SHIFT_MASK) ? ui::EF_SHIFT_DOWN : ui::EF_NONE;
+  flags |= (state & GDK_MOD1_MASK) ? ui::EF_ALT_DOWN : ui::EF_NONE;
+  flags |= (state & GDK_BUTTON1_MASK) ? ui::EF_LEFT_MOUSE_BUTTON : ui::EF_NONE;
+  flags |=
+      (state & GDK_BUTTON2_MASK) ? ui::EF_MIDDLE_MOUSE_BUTTON : ui::EF_NONE;
+  flags |= (state & GDK_BUTTON3_MASK) ? ui::EF_RIGHT_MOUSE_BUTTON : ui::EF_NONE;
+  return flags;
+}
+
 }  // namespace libgtk2ui