src/views/SkWindow.cpp

/*
 * Copyright 2011 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
#include "SkWindow.h"
#include "SkCanvas.h"
#include "SkDevice.h"
#include "SkOSMenu.h"
#include "SkSystemEventTypes.h"
#include "SkTime.h"

#define SK_EventDelayInval "\xd" "n" "\xa" "l"

#define TEST_BOUNDERx

#include "SkBounder.h"
class test_bounder : public SkBounder {
public:
	test_bounder(const SkBitmap& bm) : fCanvas(bm) {}
protected:
	virtual bool onIRect(const SkIRect& r)
	{
		SkRect	rr;

		rr.set(SkIntToScalar(r.fLeft), SkIntToScalar(r.fTop),
				SkIntToScalar(r.fRight), SkIntToScalar(r.fBottom));

		SkPaint	p;

		p.setStyle(SkPaint::kStroke_Style);
		p.setColor(SK_ColorYELLOW);

#if 0
		rr.inset(SK_ScalarHalf, SK_ScalarHalf);
#else
		rr.inset(-SK_ScalarHalf, -SK_ScalarHalf);
#endif

		fCanvas.drawRect(rr, p);
		return true;
	}
private:
	SkCanvas	fCanvas;
};

SkWindow::SkWindow() : fFocusView(NULL)
{
    fClicks.reset();
    fWaitingOnInval = false;

#ifdef SK_BUILD_FOR_WINCE
    fConfig = SkBitmap::kRGB_565_Config;
#else
    fConfig = SkBitmap::kARGB_8888_Config;
#endif

    fMatrix.reset();
}

SkWindow::~SkWindow()
{
    fClicks.deleteAll();
    fMenus.deleteAll();
}

void SkWindow::setMatrix(const SkMatrix& matrix) {
    if (fMatrix != matrix) {
        fMatrix = matrix;
        this->inval(NULL);
    }
}

void SkWindow::preConcat(const SkMatrix& matrix) {
    SkMatrix m;
    m.setConcat(fMatrix, matrix);
    this->setMatrix(m);
}

void SkWindow::postConcat(const SkMatrix& matrix) {
    SkMatrix m;
    m.setConcat(matrix, fMatrix);
    this->setMatrix(m);
}

void SkWindow::setConfig(SkBitmap::Config config)
{
	this->resize(fBitmap.width(), fBitmap.height(), config);
}

void SkWindow::resize(int width, int height, SkBitmap::Config config)
{
	if (config == SkBitmap::kNo_Config)
		config = fConfig;

	if (width != fBitmap.width() || height != fBitmap.height() || config != fConfig)
	{
		fConfig = config;
		fBitmap.setConfig(config, width, height);
		fBitmap.allocPixels();
        fBitmap.setIsOpaque(true);

		this->setSize(SkIntToScalar(width), SkIntToScalar(height));
		this->inval(NULL);
	}
}

void SkWindow::eraseARGB(U8CPU a, U8CPU r, U8CPU g, U8CPU b)
{
	fBitmap.eraseARGB(a, r, g, b);
}

void SkWindow::eraseRGB(U8CPU r, U8CPU g, U8CPU b)
{
	fBitmap.eraseRGB(r, g, b);
}

bool SkWindow::handleInval(const SkRect* localR)
{
	SkIRect	ir;

    if (localR) {
        SkRect devR;
        SkMatrix inverse;
        if (!fMatrix.invert(&inverse)) {
            return false;
        }
        fMatrix.mapRect(&devR, *localR);
        devR.round(&ir);
    } else {
        ir.set(0, 0,
			   SkScalarRound(this->width()),
			   SkScalarRound(this->height()));
    }
	fDirtyRgn.op(ir, SkRegion::kUnion_Op);

	this->onHandleInval(ir);
	return true;
}

void SkWindow::forceInvalAll() {
    fDirtyRgn.setRect(0, 0,
                      SkScalarCeil(this->width()),
                      SkScalarCeil(this->height()));
}

#if defined(SK_BUILD_FOR_WINCE) && defined(USE_GX_SCREEN)
	#include <windows.h>
	#include <gx.h>
	extern GXDisplayProperties gDisplayProps;
#endif

#ifdef SK_SIMULATE_FAILED_MALLOC
extern bool gEnableControlledThrow;
#endif

bool SkWindow::update(SkIRect* updateArea, SkCanvas* canvas)
{
	if (!fDirtyRgn.isEmpty())
	{
		SkBitmap bm = this->getBitmap();

#if defined(SK_BUILD_FOR_WINCE) && defined(USE_GX_SCREEN)
		char* buffer = (char*)GXBeginDraw();
		SkASSERT(buffer);

		RECT	rect;
		GetWindowRect((HWND)((SkOSWindow*)this)->getHWND(), &rect);
		buffer += rect.top * gDisplayProps.cbyPitch + rect.left * gDisplayProps.cbxPitch;

		bm.setPixels(buffer);
#endif

		SkCanvas	rasterCanvas;

        if (NULL == canvas) {
            canvas = &rasterCanvas;
        }
        canvas->setBitmapDevice(bm);

		canvas->clipRegion(fDirtyRgn);
		if (updateArea)
			*updateArea = fDirtyRgn.getBounds();

        SkAutoCanvasRestore acr(canvas, true);
        canvas->concat(fMatrix);

		// empty this now, so we can correctly record any inval calls that
		// might be made during the draw call.
		fDirtyRgn.setEmpty();

#ifdef TEST_BOUNDER
		test_bounder	b(bm);
		canvas->setBounder(&b);
#endif
#ifdef SK_SIMULATE_FAILED_MALLOC
		gEnableControlledThrow = true;
#endif
#ifdef SK_BUILD_FOR_WIN32
		//try {
			this->draw(canvas);
		//}
		//catch (...) {
		//}
#else
		this->draw(canvas);
#endif
#ifdef SK_SIMULATE_FAILED_MALLOC
		gEnableControlledThrow = false;
#endif
#ifdef TEST_BOUNDER
		canvas->setBounder(NULL);
#endif

#if defined(SK_BUILD_FOR_WINCE) && defined(USE_GX_SCREEN)
		GXEndDraw();
#endif

		return true;
	}
	return false;
}

bool SkWindow::handleChar(SkUnichar uni)
{
	if (this->onHandleChar(uni))
		return true;

	SkView* focus = this->getFocusView();
	if (focus == NULL)
		focus = this;

	SkEvent evt(SK_EventType_Unichar);
	evt.setFast32(uni);
	return focus->doEvent(evt);
}

bool SkWindow::handleKey(SkKey key)
{
	if (key == kNONE_SkKey)
		return false;

	if (this->onHandleKey(key))
		return true;

	// send an event to the focus-view
	{
		SkView* focus = this->getFocusView();
		if (focus == NULL)
			focus = this;

		SkEvent evt(SK_EventType_Key);
		evt.setFast32(key);
		if (focus->doEvent(evt))
			return true;
	}

	if (key == kUp_SkKey || key == kDown_SkKey)
	{
		if (this->moveFocus(key == kUp_SkKey ? kPrev_FocusDirection : kNext_FocusDirection) == NULL)
			this->onSetFocusView(NULL);
		return true;
	}
	return false;
}

bool SkWindow::handleKeyUp(SkKey key)
{
    if (key == kNONE_SkKey)
        return false;
        
    if (this->onHandleKeyUp(key))
        return true;
    
    //send an event to the focus-view
    {
        SkView* focus = this->getFocusView();
        if (focus == NULL)
            focus = this;
            
        //should this one be the same?
        SkEvent evt(SK_EventType_KeyUp);
        evt.setFast32(key);
        if (focus->doEvent(evt))
            return true;
    }
    return false;
}

void SkWindow::addMenu(SkOSMenu* menu) {
	*fMenus.append() = menu;
	this->onAddMenu(menu);
}

void SkWindow::setTitle(const char title[]) {
    if (NULL == title) {
        title = "";
    }
    fTitle.set(title);
    this->onSetTitle(title);
}

//////////////////////////////////////////////////////////////////////

bool SkWindow::onEvent(const SkEvent& evt)
{
	if (evt.isType(SK_EventDelayInval))
	{
		SkRegion::Iterator	iter(fDirtyRgn);

		for (; !iter.done(); iter.next())
			this->onHandleInval(iter.rect());
		fWaitingOnInval = false;
		return true;
	}
	return this->INHERITED::onEvent(evt);
}

bool SkWindow::onGetFocusView(SkView** focus) const
{
	if (focus)
		*focus = fFocusView;
	return true;
}

bool SkWindow::onSetFocusView(SkView* focus)
{
	if (fFocusView != focus)
	{
		if (fFocusView)
			fFocusView->onFocusChange(false);
		fFocusView = focus;
		if (focus)
			focus->onFocusChange(true);
	}
	return true;
}

//////////////////////////////////////////////////////////////////////

void SkWindow::onHandleInval(const SkIRect&)
{
}

bool SkWindow::onHandleChar(SkUnichar)
{
	return false;
}

bool SkWindow::onHandleKey(SkKey key)
{
	return false;
}

bool SkWindow::onHandleKeyUp(SkKey key)
{
    return false;
}

bool SkWindow::handleClick(int x, int y, Click::State state, void *owner) {
    return this->onDispatchClick(x, y, state, owner);
}

bool SkWindow::onDispatchClick(int x, int y, Click::State state,
        void* owner) {
	bool handled = false;

    // First, attempt to find an existing click with this owner.
    int index = -1;
    for (int i = 0; i < fClicks.count(); i++) {
        if (owner == fClicks[i]->fOwner) {
            index = i;
            break;
        }
    }

	switch (state) {
        case Click::kDown_State: {
            if (index != -1) {
                delete fClicks[index];
                fClicks.remove(index);
            }
            Click* click = this->findClickHandler(SkIntToScalar(x),
                    SkIntToScalar(y));

            if (click) {
                click->fOwner = owner;
                *fClicks.append() = click;
                SkView::DoClickDown(click, x, y);
                handled = true;
            }
            break;
        }
        case Click::kMoved_State:
            if (index != -1) {
                SkView::DoClickMoved(fClicks[index], x, y);
                handled = true;
            }
            break;
        case Click::kUp_State:
            if (index != -1) {
                SkView::DoClickUp(fClicks[index], x, y);
                delete fClicks[index];
                fClicks.remove(index);
                handled = true;
            }
            break;
        default:
            // Do nothing
            break;
	}
	return handled;
}