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, bool vertical) {
39 scoped_refptr<PPB_Scrollbar_Impl> scrollbar(new PPB_Scrollbar_Impl(instance));
40 scrollbar->Init(vertical);
41 return scrollbar->GetReference();
42 }
43
PPB_Scrollbar_Impl(PP_Instance instance)44 PPB_Scrollbar_Impl::PPB_Scrollbar_Impl(PP_Instance instance)
45 : PPB_Widget_Impl(instance), weak_ptr_factory_(this) {}
46
~PPB_Scrollbar_Impl()47 PPB_Scrollbar_Impl::~PPB_Scrollbar_Impl() {}
48
Init(bool vertical)49 void 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
AsPPB_Scrollbar_API()60 PPB_Scrollbar_API* PPB_Scrollbar_Impl::AsPPB_Scrollbar_API() { return this; }
61
InstanceWasDeleted()62 void PPB_Scrollbar_Impl::InstanceWasDeleted() { scrollbar_.reset(); }
63
GetThickness()64 uint32_t PPB_Scrollbar_Impl::GetThickness() {
65 return WebPluginScrollbar::defaultThickness();
66 }
67
IsOverlay()68 bool PPB_Scrollbar_Impl::IsOverlay() { return scrollbar_->isOverlay(); }
69
GetValue()70 uint32_t PPB_Scrollbar_Impl::GetValue() { return scrollbar_->value(); }
71
SetValue(uint32_t value)72 void PPB_Scrollbar_Impl::SetValue(uint32_t value) {
73 if (scrollbar_)
74 scrollbar_->setValue(value);
75 }
76
SetDocumentSize(uint32_t size)77 void PPB_Scrollbar_Impl::SetDocumentSize(uint32_t size) {
78 if (scrollbar_)
79 scrollbar_->setDocumentSize(size);
80 }
81
SetTickMarks(const PP_Rect * tick_marks,uint32_t count)82 void 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
ScrollBy(PP_ScrollBy_Dev unit,int32_t multiplier)98 void 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
PaintInternal(const gfx::Rect & rect,PPB_ImageData_Impl * image)123 PP_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
HandleEventInternal(const ppapi::InputEventData & data)142 PP_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
SetLocationInternal(const PP_Rect * location)151 void 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
valueChanged(blink::WebPluginScrollbar * scrollbar)160 void 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
overlayChanged(WebPluginScrollbar * scrollbar)181 void 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
invalidateScrollbarRect(blink::WebPluginScrollbar * scrollbar,const blink::WebRect & rect)196 void 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
getTickmarks(blink::WebPluginScrollbar * scrollbar,blink::WebVector<blink::WebRect> * tick_marks) const213 void 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
NotifyInvalidate()224 void 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