Java Code Examples for org.chromium.content.browser.ContentViewCore#onPhysicalBackingSizeChanged()

/**
 * Adjusts the physical backing size of a given ContentViewCore. This method will first check
 * if the ContentViewCore's client wants to override the size and, if so, it will use the
 * values provided by the {@link ContentViewClient#getDesiredWidthMeasureSpec()} and
 * {@link ContentViewClient#getDesiredHeightMeasureSpec()} methods. If no value is provided
 * in one of these methods, the values from the |width| and |height| arguments will be
 * used instead.
 *
 * @param contentViewCore The {@link ContentViewCore} to resize.
 * @param width The default width.
 * @param height The default height.
 */
private void adjustPhysicalBackingSize(ContentViewCore contentViewCore, int width, int height) {
    ContentViewClient client = contentViewCore.getContentViewClient();

    int desiredWidthMeasureSpec = client.getDesiredWidthMeasureSpec();
    if (MeasureSpec.getMode(desiredWidthMeasureSpec) != MeasureSpec.UNSPECIFIED) {
        width = MeasureSpec.getSize(desiredWidthMeasureSpec);
    }

    int desiredHeightMeasureSpec = client.getDesiredHeightMeasureSpec();
    if (MeasureSpec.getMode(desiredHeightMeasureSpec) != MeasureSpec.UNSPECIFIED) {
        height = MeasureSpec.getSize(desiredHeightMeasureSpec);
    }

    contentViewCore.onPhysicalBackingSizeChanged(width, height);
}
 

/**
 * Adjusts the physical backing size of a given ContentViewCore. This method will first check
 * if the ContentViewCore's client wants to override the size and, if so, it will use the
 * values provided by the {@link ContentViewClient#getDesiredWidthMeasureSpec()} and
 * {@link ContentViewClient#getDesiredHeightMeasureSpec()} methods. If no value is provided
 * in one of these methods, the values from the |width| and |height| arguments will be
 * used instead.
 *
 * @param contentViewCore The {@link ContentViewCore} to resize.
 * @param width The default width.
 * @param height The default height.
 */
private void adjustPhysicalBackingSize(ContentViewCore contentViewCore, int width, int height) {
    ContentViewClient client = contentViewCore.getContentViewClient();

    int desiredWidthMeasureSpec = client.getDesiredWidthMeasureSpec();
    if (MeasureSpec.getMode(desiredWidthMeasureSpec) != MeasureSpec.UNSPECIFIED) {
        width = MeasureSpec.getSize(desiredWidthMeasureSpec);
    }

    int desiredHeightMeasureSpec = client.getDesiredHeightMeasureSpec();
    if (MeasureSpec.getMode(desiredHeightMeasureSpec) != MeasureSpec.UNSPECIFIED) {
        height = MeasureSpec.getSize(desiredHeightMeasureSpec);
    }

    contentViewCore.onPhysicalBackingSizeChanged(width, height);
}
 

/**
 * Resize the panel's ContentViewCore manually since it is not attached to the view hierarchy.
 * TODO(mdjones): Remove the need for this method by supporting multiple ContentViewCores
 * existing simultaneously in the view hierarchy.
 * @param width The new width in dp.
 * @param height The new height in dp.
 */
private void resizePanelContentViewCore(float width, float height) {
    if (!isShowing()) return;
    ContentViewCore panelContent = getContentViewCore();
    if (panelContent != null) {
        // Take the height of the toolbar into consideration.
        int toolbarHeightPx = getTopControlsOffsetDp() > 0
                ? 0 : (int) (getToolbarHeight() / mPxToDp);
        panelContent.onSizeChanged((int) (width / mPxToDp),
                (int) (height / mPxToDp) + toolbarHeightPx, panelContent.getViewportWidthPix(),
                panelContent.getViewportHeightPix());
        panelContent.onPhysicalBackingSizeChanged(
                (int) (width / mPxToDp), (int) (height / mPxToDp));
    }
}
 

/**
 * Resize the panel's ContentViewCore manually since it is not attached to the view hierarchy.
 * TODO(mdjones): Remove the need for this method by supporting multiple ContentViewCores
 * existing simultaneously in the view hierarchy.
 * @param width The new width in dp.
 * @param height The new height in dp.
 */
protected void resizePanelContentViewCore(float width, float height) {
    if (!isShowing()) return;
    ContentViewCore panelContent = getContentViewCore();
    if (panelContent != null) {
        panelContent.onSizeChanged((int) (width / mPxToDp),
                (int) (height / mPxToDp), panelContent.getViewportWidthPix(),
                panelContent.getViewportHeightPix());
        panelContent.onPhysicalBackingSizeChanged(
                (int) (width / mPxToDp), (int) (height / mPxToDp));
    }
}
 

/**
 * Called to swap out the current view with the one passed in.
 *
 * @param newContentViewCore The content view that should be swapped into the tab.
 * @param deleteOldNativeWebContents Whether to delete the native web
 *         contents of old view.
 * @param didStartLoad Whether
 *         WebContentsObserver::DidStartProvisionalLoadForFrame() has
 *         already been called.
 * @param didFinishLoad Whether WebContentsObserver::DidFinishLoad() has
 *         already been called.
 */
public void swapContentViewCore(ContentViewCore newContentViewCore,
        boolean deleteOldNativeWebContents, boolean didStartLoad, boolean didFinishLoad) {
    int originalWidth = 0;
    int originalHeight = 0;
    if (mContentViewCore != null) {
        originalWidth = mContentViewCore.getViewportWidthPix();
        originalHeight = mContentViewCore.getViewportHeightPix();
        mContentViewCore.onHide();
    }

    Rect bounds = new Rect();
    if (originalWidth == 0 && originalHeight == 0) {
        bounds = ExternalPrerenderHandler.estimateContentSize(
                (Application) getApplicationContext(), false);
        originalWidth = bounds.right - bounds.left;
        originalHeight = bounds.bottom - bounds.top;
    }

    destroyContentViewCore(deleteOldNativeWebContents);
    NativePage previousNativePage = mNativePage;
    mNativePage = null;
    // Size of the new ContentViewCore is zero at this point. If we don't call onSizeChanged(),
    // next onShow() call would send a resize message with the current ContentViewCore size
    // (zero) to the renderer process, although the new size will be set soon.
    // However, this size fluttering may confuse Blink and rendered result can be broken
    // (see http://crbug.com/340987).
    newContentViewCore.onSizeChanged(originalWidth, originalHeight, 0, 0);
    if (!bounds.isEmpty()) {
        newContentViewCore.onPhysicalBackingSizeChanged(bounds.right, bounds.bottom);
    }
    newContentViewCore.onShow();
    setContentViewCore(newContentViewCore);

    mContentViewCore.attachImeAdapter();

    // If the URL has already committed (e.g. prerendering), tell process management logic that
    // it can rely on the process visibility signal for binding management.
    // TODO: Call ChildProcessLauncher#determinedVisibility() at a more intuitive time.
    // See crbug.com/537671
    if (!mContentViewCore.getWebContents().getLastCommittedUrl().equals("")) {
        ChildProcessLauncher.determinedVisibility(mContentViewCore.getCurrentRenderProcessId());
    }

    destroyNativePageInternal(previousNativePage);
    for (TabObserver observer : mObservers) {
        observer.onWebContentsSwapped(this, didStartLoad, didFinishLoad);
    }
}