WebKit/android/jni/WebFrameView.cpp

/*
 * Copyright 2008, 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.
 */

#define LOG_TAG "webcoreglue"

#include <config.h>
#include "WebFrameView.h"

#include "android_graphics.h"
#include "GraphicsContext.h"
#include "Frame.h"
#include "FrameTree.h"
#include "FrameView.h"
#include "HostWindow.h"
#include "PlatformGraphicsContext.h"
#include "WebViewCore.h"

#include <SkCanvas.h>

namespace android {

WebFrameView::WebFrameView(WebCore::FrameView* frameView, WebViewCore* webViewCore)
    : WebCoreViewBridge()
    , mFrameView(frameView)
    , mWebViewCore(webViewCore) {
    // attach itself to mFrameView
    mFrameView->setPlatformWidget(this);
    Retain(mWebViewCore);
}

WebFrameView::~WebFrameView() {
    Release(mWebViewCore);
}

void WebFrameView::draw(WebCore::GraphicsContext* ctx, const WebCore::IntRect& rect) {
    WebCore::Frame* frame = mFrameView->frame();

    if (NULL == frame->contentRenderer()) {
        // We only do this if there is nothing else to draw.
        // If there is a renderer, it will fill the bg itself, so we don't want to
        // double-draw (slow)
        SkCanvas* canvas = ctx->platformContext()->mCanvas;
        canvas->drawColor(SK_ColorWHITE);
    } else if (frame->tree()->parent()) {
        // Note: this code was moved from FrameLoaderClientAndroid
        //
        // For subframe, create a new translated rect from the given rectangle.
        WebCore::IntRect transRect(rect);
        // In Frame::markAllMatchesForText(), it does a fake paint.  So we need
        // to handle the case where platformContext() is null.  However, we still
        // want to call paint, since WebKit must have called the paint for a reason.
        SkCanvas* canvas = ctx->platformContext() ? ctx->platformContext()->mCanvas : NULL;
        if (canvas) {
            const WebCore::IntRect& bounds = getBounds();

            // Grab the intersection of transRect and the frame's bounds.
            transRect.intersect(bounds);
            if (transRect.isEmpty())
                return;

            // Move the transRect into the frame's local coordinates.
            transRect.move(-bounds.x(), -bounds.y());

            // Translate the canvas, add a clip.
            canvas->save();
            canvas->translate(SkIntToScalar(bounds.x()), SkIntToScalar(bounds.y()));
            canvas->clipRect(transRect);
        }
        mFrameView->paintContents(ctx, transRect);
        if (canvas)
            canvas->restore();
    } else {
        mFrameView->paintContents(ctx, rect);
    }
}

void WebFrameView::setView(WebCore::FrameView* frameView) {
    mFrameView = frameView;
    mFrameView->setPlatformWidget(this);
}

}   // namespace android