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/*
* Copyright 2006, The Android Open Source Project
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef platform_graphics_context_h
#define platform_graphics_context_h
#include "IntRect.h"
#include "RenderSkinAndroid.h"
#include "RenderSkinButton.h"
#include "SkCanvas.h"
#include "SkPicture.h"
#include "SkTDArray.h"
class SkCanvas;
class Container {
public:
Container(WebCore::Node* node, const WebCore::IntRect& r)
: m_node(node), m_rect(r), m_state(WebCore::RenderSkinAndroid::kDisabled)
{
m_picture = new SkPicture;
}
~Container()
{
m_picture->unref();
}
Container& operator=(const Container& src)
{
if (this != &src) {
m_node = src.m_node;
if (m_picture)
m_picture->unref();
m_picture = src.m_picture;
m_picture->ref();
m_rect = src.m_rect;
m_state = WebCore::RenderSkinAndroid::kDisabled;
}
return *this;
}
Container(const Container& src)
{
m_node = src.m_node;
m_picture = src.m_picture;
m_picture->ref();
m_rect = src.m_rect;
m_state = WebCore::RenderSkinAndroid::kDisabled;
}
// m_picture has a ref count of 1 to begin with. It will increase each time
// m_picture is referenced by another picture. When the other pictures are
// deleted, the ref count gets decremented. If the ref count is one, then
// no other pictures reference this one, so the button is no longer being
// used, and therefore can be removed.
bool canBeRemoved()
{
return m_picture->getRefCnt() == 1;
}
bool matches(const WebCore::Node* match) { return m_node == match; }
const WebCore::Node* node() const { return m_node; }
// Provide a pointer to our SkPicture.
SkPicture* picture() { return m_picture; }
WebCore::IntRect rect() { return m_rect; }
// Update the rectangle with a new rectangle, as the positioning of this
// button may have changed due to a new layout. If it is a new rectangle,
// set its state to disabled, so that it will be redrawn when we cycle
// through the list of buttons.
void setRect(WebCore::IntRect r)
{
if (m_rect != r) {
m_rect = r;
m_state = WebCore::RenderSkinAndroid::kDisabled;
}
}
// Update the focus state of this button, depending on whether it
// corresponds to the focused node passed in. If its state has changed,
// re-record to the subpicture, so the master picture will reflect the
// change.
void updateFocusState(WebCore::RenderSkinAndroid::State state,
const WebCore::RenderSkinButton* buttonSkin)
{
if (state == m_state)
return;
// If this button is being told to draw focused, but it is already in a
// pressed state, leave it in the pressed state, to show that it is
// being followed.
if (m_state == WebCore::RenderSkinAndroid::kPressed &&
state == WebCore::RenderSkinAndroid::kFocused)
return;
m_state = state;
SkCanvas* canvas = m_picture->beginRecording(m_rect.right(), m_rect.bottom());
buttonSkin->draw(canvas, m_rect, state);
m_picture->endRecording();
}
private:
// Only used for comparison, since after it is stored it will be transferred
// to the UI thread.
WebCore::Node* m_node;
// The rectangle representing the bounds of the button.
WebCore::IntRect m_rect;
// An SkPicture that, thanks to storeButtonInfo, is pointed to by the master
// picture, so that we can rerecord this button without rerecording the
// world.
SkPicture* m_picture;
// The state of the button - Currently kFocused or kNormal (and kDisabled
// as an initial value), but could be expanded to include other states.
WebCore::RenderSkinAndroid::State m_state;
};
namespace WebCore {
class GraphicsContext;
class PlatformGraphicsContext {
public:
PlatformGraphicsContext();
// Pass in a recording canvas, and an array of button information to be
// updated.
PlatformGraphicsContext(SkCanvas* canvas, WTF::Vector<Container>* buttons);
~PlatformGraphicsContext();
SkCanvas* mCanvas;
bool deleteUs() const { return m_deleteCanvas; }
// If our graphicscontext has a button list, add a new container for the
// nod/rect, and record a new subpicture for this node/button in the current
// mCanvas
void storeButtonInfo(Node* node, const IntRect& r);
private:
bool m_deleteCanvas;
WTF::Vector<Container>* m_buttons;
};
}
#endif
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