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// Copyright (c) 2010 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 "webkit/glue/plugins/pepper_scrollbar.h"
#include "base/logging.h"
#include "base/message_loop.h"
#include "third_party/ppapi/c/ppp_scrollbar.h"
#include "third_party/WebKit/WebKit/chromium/public/WebInputEvent.h"
#include "third_party/WebKit/WebKit/chromium/public/WebRect.h"
#include "third_party/WebKit/WebKit/chromium/public/WebScrollbar.h"
#include "third_party/WebKit/WebKit/chromium/public/WebVector.h"
#include "webkit/glue/plugins/pepper_event_conversion.h"
#include "webkit/glue/plugins/pepper_image_data.h"
#include "webkit/glue/plugins/pepper_plugin_instance.h"
#include "webkit/glue/plugins/pepper_plugin_module.h"
#include "webkit/glue/webkit_glue.h"
using WebKit::WebInputEvent;
using WebKit::WebRect;
using WebKit::WebScrollbar;
namespace pepper {
namespace {
PP_Resource Create(PP_Instance instance_id, bool vertical) {
PluginInstance* instance = PluginInstance::FromPPInstance(instance_id);
if (!instance)
return NULL;
scoped_refptr<Scrollbar> scrollbar(new Scrollbar(instance, vertical));
return scrollbar->GetReference();
}
bool IsScrollbar(PP_Resource resource) {
return !!Resource::GetAs<Scrollbar>(resource);
}
uint32_t GetThickness() {
return WebScrollbar::defaultThickness();
}
uint32_t GetValue(PP_Resource resource) {
scoped_refptr<Scrollbar> scrollbar(Resource::GetAs<Scrollbar>(resource));
if (!scrollbar)
return 0;
return scrollbar->GetValue();
}
void SetValue(PP_Resource resource, uint32_t value) {
scoped_refptr<Scrollbar> scrollbar(Resource::GetAs<Scrollbar>(resource));
if (scrollbar)
scrollbar->SetValue(value);
}
void SetDocumentSize(PP_Resource resource, uint32_t size) {
scoped_refptr<Scrollbar> scrollbar(Resource::GetAs<Scrollbar>(resource));
if (scrollbar)
scrollbar->SetDocumentSize(size);
}
void SetTickMarks(PP_Resource resource,
const PP_Rect* tick_marks,
uint32_t count) {
scoped_refptr<Scrollbar> scrollbar(Resource::GetAs<Scrollbar>(resource));
if (scrollbar)
scrollbar->SetTickMarks(tick_marks, count);
}
void ScrollBy(PP_Resource resource,
PP_ScrollBy unit,
int32_t multiplier) {
scoped_refptr<Scrollbar> scrollbar(Resource::GetAs<Scrollbar>(resource));
if (scrollbar)
scrollbar->ScrollBy(unit, multiplier);
}
const PPB_Scrollbar ppb_scrollbar = {
&Create,
&IsScrollbar,
&GetThickness,
&GetValue,
&SetValue,
&SetDocumentSize,
&SetTickMarks,
&ScrollBy
};
} // namespace
Scrollbar::Scrollbar(PluginInstance* instance, bool vertical)
: Widget(instance) {
scrollbar_.reset(WebScrollbar::create(
static_cast<WebKit::WebScrollbarClient*>(this),
vertical ? WebScrollbar::Vertical : WebScrollbar::Horizontal));
}
Scrollbar::~Scrollbar() {
}
// static
const PPB_Scrollbar* Scrollbar::GetInterface() {
return &ppb_scrollbar;
}
uint32_t Scrollbar::GetValue() {
return scrollbar_->value();
}
void Scrollbar::SetValue(uint32_t value) {
scrollbar_->setValue(value);
}
void Scrollbar::SetDocumentSize(uint32_t size) {
scrollbar_->setDocumentSize(size);
}
void Scrollbar::SetTickMarks(const PP_Rect* tick_marks, uint32_t count) {
tickmarks_.resize(count);
for (uint32 i = 0; i < count; ++i) {
tickmarks_[i] = WebRect(tick_marks[i].point.x,
tick_marks[i].point.y,
tick_marks[i].size.width,
tick_marks[i].size.height);;
}
PP_Rect rect = location();
Invalidate(&rect);
}
void Scrollbar::ScrollBy(PP_ScrollBy unit, int32_t multiplier) {
WebScrollbar::ScrollDirection direction = multiplier >= 0 ?
WebScrollbar::ScrollForward : WebScrollbar::ScrollBackward;
float fmultiplier = 1.0;
WebScrollbar::ScrollGranularity granularity;
if (unit == PP_SCROLLBY_LINE) {
granularity = WebScrollbar::ScrollByLine;
} else if (unit == PP_SCROLLBY_PAGE) {
granularity = WebScrollbar::ScrollByPage;
} else if (unit == PP_SCROLLBY_DOCUMENT) {
granularity = WebScrollbar::ScrollByDocument;
} else {
granularity = WebScrollbar::ScrollByPixel;
fmultiplier = static_cast<float>(multiplier);
if (fmultiplier < 0)
fmultiplier *= -1;
}
scrollbar_->scroll(direction, granularity, fmultiplier);
}
bool Scrollbar::Paint(const PP_Rect* rect, ImageData* image) {
gfx::Rect gfx_rect(rect->point.x,
rect->point.y,
rect->size.width,
rect->size.height);
skia::PlatformCanvas* canvas = image->mapped_canvas();
if (!canvas)
return false;
scrollbar_->paint(webkit_glue::ToWebCanvas(canvas), gfx_rect);
return true;
}
bool Scrollbar::HandleEvent(const PP_Event* event) {
scoped_ptr<WebInputEvent> web_input_event(CreateWebInputEvent(*event));
if (!web_input_event.get())
return false;
return scrollbar_->handleInputEvent(*web_input_event.get());
}
void Scrollbar::SetLocationInternal(const PP_Rect* location) {
scrollbar_->setLocation(WebRect(location->point.x,
location->point.y,
location->size.width,
location->size.height));
}
void Scrollbar::valueChanged(WebKit::WebScrollbar* scrollbar) {
const PPP_Scrollbar* ppp_scrollbar = static_cast<const PPP_Scrollbar*>(
module()->GetPluginInterface(PPP_SCROLLBAR_INTERFACE));
if (!ppp_scrollbar)
return;
ScopedResourceId resource(this);
ppp_scrollbar->ValueChanged(
instance()->GetPPInstance(), resource.id, scrollbar_->value());
}
void Scrollbar::invalidateScrollbarRect(WebKit::WebScrollbar* scrollbar,
const WebKit::WebRect& rect) {
gfx::Rect gfx_rect(rect.x,
rect.y,
rect.width,
rect.height);
dirty_ = dirty_.Union(gfx_rect);
// Can't call into the client to tell them about the invalidate right away,
// since the Scrollbar code is still in the middle of updating its internal
// state.
MessageLoop::current()->PostTask(
FROM_HERE,
NewRunnableMethod(this, &Scrollbar::NotifyInvalidate));
}
void Scrollbar::getTickmarks(
WebKit::WebScrollbar* scrollbar,
WebKit::WebVector<WebKit::WebRect>* tick_marks) const {
if (tickmarks_.empty()) {
WebRect* rects = NULL;
tick_marks->assign(rects, 0);
} else {
tick_marks->assign(&tickmarks_[0], tickmarks_.size());
}
}
void Scrollbar::NotifyInvalidate() {
if (dirty_.IsEmpty())
return;
PP_Rect pp_rect;
pp_rect.point.x = dirty_.x();
pp_rect.point.y = dirty_.y();
pp_rect.size.width = dirty_.width();
pp_rect.size.height = dirty_.height();
dirty_ = gfx::Rect();
Invalidate(&pp_rect);
}
} // namespace pepper
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