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/common.h"
11 #include "content/renderer/pepper/event_conversion.h"
12 #include "content/renderer/pepper/host_globals.h"
13 #include "content/renderer/pepper/pepper_plugin_instance_impl.h"
14 #include "content/renderer/pepper/plugin_module.h"
15 #include "content/renderer/pepper/ppb_image_data_impl.h"
16 #include "ppapi/c/dev/ppp_scrollbar_dev.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
29 using ppapi::thunk::PPB_Scrollbar_API;
30 using blink::WebInputEvent;
31 using blink::WebRect;
32 using blink::WebScrollbar;
33 using blink::WebPluginScrollbar;
34
35 namespace content {
36
37 // static
Create(PP_Instance instance,bool vertical)38 PP_Resource PPB_Scrollbar_Impl::Create(PP_Instance instance,
39 bool vertical) {
40 scoped_refptr<PPB_Scrollbar_Impl> scrollbar(
41 new PPB_Scrollbar_Impl(instance));
42 scrollbar->Init(vertical);
43 return scrollbar->GetReference();
44 }
45
PPB_Scrollbar_Impl(PP_Instance instance)46 PPB_Scrollbar_Impl::PPB_Scrollbar_Impl(PP_Instance instance)
47 : PPB_Widget_Impl(instance),
48 weak_ptr_factory_(this) {
49 }
50
~PPB_Scrollbar_Impl()51 PPB_Scrollbar_Impl::~PPB_Scrollbar_Impl() {
52 }
53
Init(bool vertical)54 void PPB_Scrollbar_Impl::Init(bool vertical) {
55 PepperPluginInstanceImpl* plugin_instance =
56 HostGlobals::Get()->GetInstance(pp_instance());
57 if (!plugin_instance)
58 return;
59 scrollbar_.reset(WebPluginScrollbar::createForPlugin(
60 vertical ? WebScrollbar::Vertical : WebScrollbar::Horizontal,
61 plugin_instance->container(),
62 static_cast<blink::WebPluginScrollbarClient*>(this)));
63 }
64
AsPPB_Scrollbar_API()65 PPB_Scrollbar_API* PPB_Scrollbar_Impl::AsPPB_Scrollbar_API() {
66 return this;
67 }
68
InstanceWasDeleted()69 void PPB_Scrollbar_Impl::InstanceWasDeleted() {
70 scrollbar_.reset();
71 }
72
GetThickness()73 uint32_t PPB_Scrollbar_Impl::GetThickness() {
74 return WebPluginScrollbar::defaultThickness();
75 }
76
IsOverlay()77 bool PPB_Scrollbar_Impl::IsOverlay() {
78 return scrollbar_->isOverlay();
79 }
80
GetValue()81 uint32_t PPB_Scrollbar_Impl::GetValue() {
82 return scrollbar_->value();
83 }
84
SetValue(uint32_t value)85 void PPB_Scrollbar_Impl::SetValue(uint32_t value) {
86 if (scrollbar_)
87 scrollbar_->setValue(value);
88 }
89
SetDocumentSize(uint32_t size)90 void PPB_Scrollbar_Impl::SetDocumentSize(uint32_t size) {
91 if (scrollbar_)
92 scrollbar_->setDocumentSize(size);
93 }
94
SetTickMarks(const PP_Rect * tick_marks,uint32_t count)95 void PPB_Scrollbar_Impl::SetTickMarks(const PP_Rect* tick_marks,
96 uint32_t count) {
97 if (!scrollbar_)
98 return;
99 tickmarks_.resize(count);
100 for (uint32 i = 0; i < count; ++i) {
101 tickmarks_[i] = WebRect(tick_marks[i].point.x,
102 tick_marks[i].point.y,
103 tick_marks[i].size.width,
104 tick_marks[i].size.height);;
105 }
106 PP_Rect rect = location();
107 Invalidate(&rect);
108 }
109
ScrollBy(PP_ScrollBy_Dev unit,int32_t multiplier)110 void PPB_Scrollbar_Impl::ScrollBy(PP_ScrollBy_Dev unit, int32_t multiplier) {
111 if (!scrollbar_)
112 return;
113
114 WebScrollbar::ScrollDirection direction = multiplier >= 0 ?
115 WebScrollbar::ScrollForward : WebScrollbar::ScrollBackward;
116 float fmultiplier = 1.0;
117
118 WebScrollbar::ScrollGranularity granularity;
119 if (unit == PP_SCROLLBY_LINE) {
120 granularity = WebScrollbar::ScrollByLine;
121 } else if (unit == PP_SCROLLBY_PAGE) {
122 granularity = WebScrollbar::ScrollByPage;
123 } else if (unit == PP_SCROLLBY_DOCUMENT) {
124 granularity = WebScrollbar::ScrollByDocument;
125 } else {
126 granularity = WebScrollbar::ScrollByPixel;
127 fmultiplier = static_cast<float>(multiplier);
128 if (fmultiplier < 0)
129 fmultiplier *= -1;
130 }
131 scrollbar_->scroll(direction, granularity, fmultiplier);
132 }
133
PaintInternal(const gfx::Rect & rect,PPB_ImageData_Impl * image)134 PP_Bool PPB_Scrollbar_Impl::PaintInternal(const gfx::Rect& rect,
135 PPB_ImageData_Impl* image) {
136 ImageDataAutoMapper mapper(image);
137 skia::PlatformCanvas* canvas = image->GetPlatformCanvas();
138 if (!canvas || !scrollbar_)
139 return PP_FALSE;
140 canvas->save();
141 canvas->scale(scale(), scale());
142 scrollbar_->paint(canvas, rect);
143 canvas->restore();
144
145 #if defined(OS_WIN)
146 if (base::win::GetVersion() == base::win::VERSION_XP)
147 skia::MakeOpaque(canvas, rect.x(), rect.y(), rect.width(), rect.height());
148 #endif
149
150 return PP_TRUE;
151 }
152
HandleEventInternal(const ppapi::InputEventData & data)153 PP_Bool PPB_Scrollbar_Impl::HandleEventInternal(
154 const ppapi::InputEventData& data) {
155 scoped_ptr<WebInputEvent> web_input_event(CreateWebInputEvent(data));
156 if (!web_input_event.get() || !scrollbar_)
157 return PP_FALSE;
158
159 return PP_FromBool(scrollbar_->handleInputEvent(*web_input_event.get()));
160 }
161
SetLocationInternal(const PP_Rect * location)162 void PPB_Scrollbar_Impl::SetLocationInternal(const PP_Rect* location) {
163 if (!scrollbar_)
164 return;
165 scrollbar_->setLocation(WebRect(location->point.x,
166 location->point.y,
167 location->size.width,
168 location->size.height));
169 }
170
valueChanged(blink::WebPluginScrollbar * scrollbar)171 void PPB_Scrollbar_Impl::valueChanged(blink::WebPluginScrollbar* scrollbar) {
172 PluginModule* plugin_module =
173 HostGlobals::Get()->GetInstance(pp_instance())->module();
174 if (!plugin_module)
175 return;
176
177 const PPP_Scrollbar_Dev* ppp_scrollbar =
178 static_cast<const PPP_Scrollbar_Dev*>(plugin_module->GetPluginInterface(
179 PPP_SCROLLBAR_DEV_INTERFACE));
180 if (!ppp_scrollbar) {
181 // Try the old version. This is ok because the old interface is a subset of
182 // the new one, and ValueChanged didn't change.
183 ppp_scrollbar =
184 static_cast<const PPP_Scrollbar_Dev*>(plugin_module->GetPluginInterface(
185 PPP_SCROLLBAR_DEV_INTERFACE_0_2));
186 if (!ppp_scrollbar)
187 return;
188 }
189 ppp_scrollbar->ValueChanged(pp_instance(), pp_resource(),
190 scrollbar_->value());
191 }
192
overlayChanged(WebPluginScrollbar * scrollbar)193 void PPB_Scrollbar_Impl::overlayChanged(WebPluginScrollbar* scrollbar) {
194 PluginModule* plugin_module =
195 HostGlobals::Get()->GetInstance(pp_instance())->module();
196 if (!plugin_module)
197 return;
198
199 const PPP_Scrollbar_Dev* ppp_scrollbar =
200 static_cast<const PPP_Scrollbar_Dev*>(plugin_module->GetPluginInterface(
201 PPP_SCROLLBAR_DEV_INTERFACE));
202 if (!ppp_scrollbar)
203 return;
204 ppp_scrollbar->OverlayChanged(pp_instance(), pp_resource(),
205 PP_FromBool(IsOverlay()));
206 }
207
invalidateScrollbarRect(blink::WebPluginScrollbar * scrollbar,const blink::WebRect & rect)208 void PPB_Scrollbar_Impl::invalidateScrollbarRect(
209 blink::WebPluginScrollbar* scrollbar,
210 const blink::WebRect& rect) {
211 gfx::Rect gfx_rect(rect.x,
212 rect.y,
213 rect.width,
214 rect.height);
215 dirty_.Union(gfx_rect);
216 // Can't call into the client to tell them about the invalidate right away,
217 // since the PPB_Scrollbar_Impl code is still in the middle of updating its
218 // internal state.
219 // Note: we use a WeakPtrFactory here so that a lingering callback can not
220 // modify the lifetime of this object. Otherwise, blink::WebPluginScrollbar
221 // could outlive blink::WebPluginContainer, which is against its contract.
222 base::MessageLoop::current()->PostTask(
223 FROM_HERE,
224 base::Bind(&PPB_Scrollbar_Impl::NotifyInvalidate,
225 weak_ptr_factory_.GetWeakPtr()));
226 }
227
getTickmarks(blink::WebPluginScrollbar * scrollbar,blink::WebVector<blink::WebRect> * tick_marks) const228 void PPB_Scrollbar_Impl::getTickmarks(
229 blink::WebPluginScrollbar* scrollbar,
230 blink::WebVector<blink::WebRect>* tick_marks) const {
231 if (tickmarks_.empty()) {
232 WebRect* rects = NULL;
233 tick_marks->assign(rects, 0);
234 } else {
235 tick_marks->assign(&tickmarks_[0], tickmarks_.size());
236 }
237 }
238
NotifyInvalidate()239 void PPB_Scrollbar_Impl::NotifyInvalidate() {
240 if (dirty_.IsEmpty())
241 return;
242 PP_Rect pp_rect;
243 pp_rect.point.x = dirty_.x();
244 pp_rect.point.y = dirty_.y();
245 pp_rect.size.width = dirty_.width();
246 pp_rect.size.height = dirty_.height();
247 dirty_ = gfx::Rect();
248 Invalidate(&pp_rect);
249 }
250
251 } // namespace content
252