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 "content/renderer/pepper/ppb_scrollbar_impl.h" 6 7#include "base/bind.h" 8#include "base/logging.h" 9#include "base/message_loop/message_loop.h" 10#include "content/renderer/pepper/event_conversion.h" 11#include "content/renderer/pepper/host_globals.h" 12#include "content/renderer/pepper/pepper_plugin_instance_impl.h" 13#include "content/renderer/pepper/plugin_module.h" 14#include "content/renderer/pepper/ppb_image_data_impl.h" 15#include "ppapi/c/dev/ppp_scrollbar_dev.h" 16#include "ppapi/c/pp_bool.h" 17#include "ppapi/thunk/thunk.h" 18#include "skia/ext/platform_canvas.h" 19#include "third_party/WebKit/public/platform/WebCanvas.h" 20#include "third_party/WebKit/public/platform/WebRect.h" 21#include "third_party/WebKit/public/platform/WebVector.h" 22#include "third_party/WebKit/public/web/WebInputEvent.h" 23#include "third_party/WebKit/public/web/WebPluginScrollbar.h" 24 25#if defined(OS_WIN) 26#include "base/win/windows_version.h" 27#endif 28 29using ppapi::thunk::PPB_Scrollbar_API; 30using blink::WebInputEvent; 31using blink::WebRect; 32using blink::WebScrollbar; 33using blink::WebPluginScrollbar; 34 35namespace content { 36 37// static 38PP_Resource PPB_Scrollbar_Impl::Create(PP_Instance instance, bool vertical) { 39 scoped_refptr<PPB_Scrollbar_Impl> scrollbar(new PPB_Scrollbar_Impl(instance)); 40 scrollbar->Init(vertical); 41 return scrollbar->GetReference(); 42} 43 44PPB_Scrollbar_Impl::PPB_Scrollbar_Impl(PP_Instance instance) 45 : PPB_Widget_Impl(instance), weak_ptr_factory_(this) {} 46 47PPB_Scrollbar_Impl::~PPB_Scrollbar_Impl() {} 48 49void PPB_Scrollbar_Impl::Init(bool vertical) { 50 PepperPluginInstanceImpl* plugin_instance = 51 HostGlobals::Get()->GetInstance(pp_instance()); 52 if (!plugin_instance) 53 return; 54 scrollbar_.reset(WebPluginScrollbar::createForPlugin( 55 vertical ? WebScrollbar::Vertical : WebScrollbar::Horizontal, 56 plugin_instance->container(), 57 static_cast<blink::WebPluginScrollbarClient*>(this))); 58} 59 60PPB_Scrollbar_API* PPB_Scrollbar_Impl::AsPPB_Scrollbar_API() { return this; } 61 62void PPB_Scrollbar_Impl::InstanceWasDeleted() { scrollbar_.reset(); } 63 64uint32_t PPB_Scrollbar_Impl::GetThickness() { 65 return WebPluginScrollbar::defaultThickness(); 66} 67 68bool PPB_Scrollbar_Impl::IsOverlay() { return scrollbar_->isOverlay(); } 69 70uint32_t PPB_Scrollbar_Impl::GetValue() { return scrollbar_->value(); } 71 72void PPB_Scrollbar_Impl::SetValue(uint32_t value) { 73 if (scrollbar_) 74 scrollbar_->setValue(value); 75} 76 77void PPB_Scrollbar_Impl::SetDocumentSize(uint32_t size) { 78 if (scrollbar_) 79 scrollbar_->setDocumentSize(size); 80} 81 82void PPB_Scrollbar_Impl::SetTickMarks(const PP_Rect* tick_marks, 83 uint32_t count) { 84 if (!scrollbar_) 85 return; 86 tickmarks_.resize(count); 87 for (uint32 i = 0; i < count; ++i) { 88 tickmarks_[i] = WebRect(tick_marks[i].point.x, 89 tick_marks[i].point.y, 90 tick_marks[i].size.width, 91 tick_marks[i].size.height); 92 ; 93 } 94 PP_Rect rect = location(); 95 Invalidate(&rect); 96} 97 98void PPB_Scrollbar_Impl::ScrollBy(PP_ScrollBy_Dev unit, int32_t multiplier) { 99 if (!scrollbar_) 100 return; 101 102 WebScrollbar::ScrollDirection direction = multiplier >= 0 103 ? WebScrollbar::ScrollForward 104 : WebScrollbar::ScrollBackward; 105 float fmultiplier = 1.0; 106 107 WebScrollbar::ScrollGranularity granularity; 108 if (unit == PP_SCROLLBY_LINE) { 109 granularity = WebScrollbar::ScrollByLine; 110 } else if (unit == PP_SCROLLBY_PAGE) { 111 granularity = WebScrollbar::ScrollByPage; 112 } else if (unit == PP_SCROLLBY_DOCUMENT) { 113 granularity = WebScrollbar::ScrollByDocument; 114 } else { 115 granularity = WebScrollbar::ScrollByPixel; 116 fmultiplier = static_cast<float>(multiplier); 117 if (fmultiplier < 0) 118 fmultiplier *= -1; 119 } 120 scrollbar_->scroll(direction, granularity, fmultiplier); 121} 122 123PP_Bool PPB_Scrollbar_Impl::PaintInternal(const gfx::Rect& rect, 124 PPB_ImageData_Impl* image) { 125 ImageDataAutoMapper mapper(image); 126 skia::PlatformCanvas* canvas = image->GetPlatformCanvas(); 127 if (!canvas || !scrollbar_) 128 return PP_FALSE; 129 canvas->save(); 130 canvas->scale(scale(), scale()); 131 scrollbar_->paint(canvas, rect); 132 canvas->restore(); 133 134#if defined(OS_WIN) 135 if (base::win::GetVersion() == base::win::VERSION_XP) 136 skia::MakeOpaque(canvas, rect.x(), rect.y(), rect.width(), rect.height()); 137#endif 138 139 return PP_TRUE; 140} 141 142PP_Bool PPB_Scrollbar_Impl::HandleEventInternal( 143 const ppapi::InputEventData& data) { 144 scoped_ptr<WebInputEvent> web_input_event(CreateWebInputEvent(data)); 145 if (!web_input_event.get() || !scrollbar_) 146 return PP_FALSE; 147 148 return PP_FromBool(scrollbar_->handleInputEvent(*web_input_event.get())); 149} 150 151void PPB_Scrollbar_Impl::SetLocationInternal(const PP_Rect* location) { 152 if (!scrollbar_) 153 return; 154 scrollbar_->setLocation(WebRect(location->point.x, 155 location->point.y, 156 location->size.width, 157 location->size.height)); 158} 159 160void PPB_Scrollbar_Impl::valueChanged(blink::WebPluginScrollbar* scrollbar) { 161 PluginModule* plugin_module = 162 HostGlobals::Get()->GetInstance(pp_instance())->module(); 163 if (!plugin_module) 164 return; 165 166 const PPP_Scrollbar_Dev* ppp_scrollbar = 167 static_cast<const PPP_Scrollbar_Dev*>( 168 plugin_module->GetPluginInterface(PPP_SCROLLBAR_DEV_INTERFACE)); 169 if (!ppp_scrollbar) { 170 // Try the old version. This is ok because the old interface is a subset of 171 // the new one, and ValueChanged didn't change. 172 ppp_scrollbar = static_cast<const PPP_Scrollbar_Dev*>( 173 plugin_module->GetPluginInterface(PPP_SCROLLBAR_DEV_INTERFACE_0_2)); 174 if (!ppp_scrollbar) 175 return; 176 } 177 ppp_scrollbar->ValueChanged( 178 pp_instance(), pp_resource(), scrollbar_->value()); 179} 180 181void PPB_Scrollbar_Impl::overlayChanged(WebPluginScrollbar* scrollbar) { 182 PluginModule* plugin_module = 183 HostGlobals::Get()->GetInstance(pp_instance())->module(); 184 if (!plugin_module) 185 return; 186 187 const PPP_Scrollbar_Dev* ppp_scrollbar = 188 static_cast<const PPP_Scrollbar_Dev*>( 189 plugin_module->GetPluginInterface(PPP_SCROLLBAR_DEV_INTERFACE)); 190 if (!ppp_scrollbar) 191 return; 192 ppp_scrollbar->OverlayChanged( 193 pp_instance(), pp_resource(), PP_FromBool(IsOverlay())); 194} 195 196void PPB_Scrollbar_Impl::invalidateScrollbarRect( 197 blink::WebPluginScrollbar* scrollbar, 198 const blink::WebRect& rect) { 199 gfx::Rect gfx_rect(rect.x, rect.y, rect.width, rect.height); 200 dirty_.Union(gfx_rect); 201 // Can't call into the client to tell them about the invalidate right away, 202 // since the PPB_Scrollbar_Impl code is still in the middle of updating its 203 // internal state. 204 // Note: we use a WeakPtrFactory here so that a lingering callback can not 205 // modify the lifetime of this object. Otherwise, blink::WebPluginScrollbar 206 // could outlive blink::WebPluginContainer, which is against its contract. 207 base::MessageLoop::current()->PostTask( 208 FROM_HERE, 209 base::Bind(&PPB_Scrollbar_Impl::NotifyInvalidate, 210 weak_ptr_factory_.GetWeakPtr())); 211} 212 213void PPB_Scrollbar_Impl::getTickmarks( 214 blink::WebPluginScrollbar* scrollbar, 215 blink::WebVector<blink::WebRect>* tick_marks) const { 216 if (tickmarks_.empty()) { 217 WebRect* rects = NULL; 218 tick_marks->assign(rects, 0); 219 } else { 220 tick_marks->assign(&tickmarks_[0], tickmarks_.size()); 221 } 222} 223 224void PPB_Scrollbar_Impl::NotifyInvalidate() { 225 if (dirty_.IsEmpty()) 226 return; 227 PP_Rect pp_rect; 228 pp_rect.point.x = dirty_.x(); 229 pp_rect.point.y = dirty_.y(); 230 pp_rect.size.width = dirty_.width(); 231 pp_rect.size.height = dirty_.height(); 232 dirty_ = gfx::Rect(); 233 Invalidate(&pp_rect); 234} 235 236} // namespace content 237