webkit/glue/webthemeengine_impl_mac.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "webkit/glue/webthemeengine_impl_mac.h"
   6
   7 #include <Carbon/Carbon.h>
   8
   9 #include "skia/ext/skia_utils_mac.h"
  10 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebCanvas.h"
  11 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebRect.h"
  12
  13 using WebKit::WebCanvas;
  14 using WebKit::WebRect;
  15 using WebKit::WebThemeEngine;
  16
  17 namespace webkit_glue {
  18
  19 static ThemeTrackEnableState stateToHIEnableState(WebThemeEngine::State state) {
  20   switch (state) {
  21     case WebThemeEngine::StateDisabled:
  22       return kThemeTrackDisabled;
  23     case WebThemeEngine::StateInactive:
  24       return kThemeTrackInactive;
  25     default:
  26       return kThemeTrackActive;
  27   }
  28 }
  29
  30 void WebThemeEngineImpl::paintScrollbarThumb(
  31     WebCanvas* canvas,
  32     WebThemeEngine::State state,
  33     WebThemeEngine::Size size,
  34     const WebRect& rect,
  35     const WebThemeEngine::ScrollbarInfo& scrollbarInfo) {
  36   HIThemeTrackDrawInfo trackInfo;
  37   trackInfo.version = 0;
  38   trackInfo.kind = size == WebThemeEngine::SizeRegular ?
  39       kThemeMediumScrollBar : kThemeSmallScrollBar;
  40   trackInfo.bounds = CGRectMake(rect.x, rect.y, rect.width, rect.height);
  41   trackInfo.min = 0;
  42   trackInfo.max = scrollbarInfo.maxValue;
  43   trackInfo.value = scrollbarInfo.currentValue;
  44   trackInfo.trackInfo.scrollbar.viewsize = scrollbarInfo.visibleSize;
  45   trackInfo.attributes = 0;
  46   if (scrollbarInfo.orientation ==
  47       WebThemeEngine::ScrollbarOrientationHorizontal) {
  48     trackInfo.attributes |= kThemeTrackHorizontal;
  49   }
  50
  51   trackInfo.enableState = stateToHIEnableState(state);
  52
  53   trackInfo.trackInfo.scrollbar.pressState =
  54       state == WebThemeEngine::StatePressed ? kThemeThumbPressed : 0;
  55   trackInfo.attributes |= (kThemeTrackShowThumb | kThemeTrackHideTrack);
  56   gfx::SkiaBitLocker bitLocker(canvas);
  57   CGContextRef cgContext = bitLocker.cgContext();
  58   HIThemeDrawTrack(&trackInfo, 0, cgContext, kHIThemeOrientationNormal);
  59 }
  60
  61 }  // namespace webkit_glue