void
ImageDocument::RestoreImage()
{
if (!mImageContent) {
return;
}
// Keep image content alive while changing the attributes.
nsCOMPtr<Element> imageContent = mImageContent;
imageContent->UnsetAttr(kNameSpaceID_None, nsGkAtoms::width, true);
imageContent->UnsetAttr(kNameSpaceID_None, nsGkAtoms::height, true);
if (ImageIsOverflowing()) {
if (!mImageIsOverflowingVertically) {
SetModeClass(eOverflowingHorizontalOnly);
} else {
SetModeClass(eOverflowingVertical);
}
}
else {
SetModeClass(eNone);
}
mImageIsResized = false;
UpdateTitleAndCharset();
}
void
ImageDocument::ShrinkToFit()
{
if (!mImageContent) {
return;
}
if (GetZoomLevel() != mOriginalZoomLevel && mImageIsResized &&
!nsContentUtils::IsChildOfSameType(this)) {
return;
}
// Keep image content alive while changing the attributes.
nsCOMPtr<nsIContent> imageContent = mImageContent;
nsCOMPtr<nsIDOMHTMLImageElement> image = do_QueryInterface(mImageContent);
image->SetWidth(std::max(1, NSToCoordFloor(GetRatio() * mImageWidth)));
image->SetHeight(std::max(1, NSToCoordFloor(GetRatio() * mImageHeight)));
// The view might have been scrolled when zooming in, scroll back to the
// origin now that we're showing a shrunk-to-window version.
ScrollImageTo(0, 0, false);
if (!mImageContent) {
// ScrollImageTo flush destroyed our content.
return;
}
SetModeClass(eShrinkToFit);
mImageIsResized = true;
UpdateTitleAndCharset();
}
nsresult
ImageDocument::CheckOverflowing(bool changeState)
{
/* Create a scope so that the style context gets destroyed before we might
* call RebuildStyleData. Also, holding onto pointers to the
* presentation through style resolution is potentially dangerous.
*/
{
nsIPresShell *shell = GetShell();
if (!shell) {
return NS_OK;
}
nsPresContext *context = shell->GetPresContext();
nsRect visibleArea = context->GetVisibleArea();
mVisibleWidth = nsPresContext::AppUnitsToFloatCSSPixels(visibleArea.width);
mVisibleHeight = nsPresContext::AppUnitsToFloatCSSPixels(visibleArea.height);
}
bool imageWasOverflowing = ImageIsOverflowing();
bool imageWasOverflowingVertically = mImageIsOverflowingVertically;
mImageIsOverflowingHorizontally = mImageWidth > mVisibleWidth;
mImageIsOverflowingVertically = mImageHeight > mVisibleHeight;
bool windowBecameBigEnough = imageWasOverflowing && !ImageIsOverflowing();
bool verticalOverflowChanged =
mImageIsOverflowingVertically != imageWasOverflowingVertically;
if (changeState || mShouldResize || mFirstResize ||
windowBecameBigEnough || verticalOverflowChanged) {
if (ImageIsOverflowing() && (changeState || mShouldResize)) {
ShrinkToFit();
}
else if (mImageIsResized || mFirstResize || windowBecameBigEnough) {
RestoreImage();
} else if (!mImageIsResized && verticalOverflowChanged) {
if (mImageIsOverflowingVertically) {
SetModeClass(eOverflowingVertical);
} else {
SetModeClass(eOverflowingHorizontalOnly);
}
}
}
mFirstResize = false;
return NS_OK;
}
void
ImageDocument::ShrinkToFit()
{
if (!mImageContent) {
return;
}
if (GetZoomLevel() != mOriginalZoomLevel && mImageIsResized &&
!nsContentUtils::IsChildOfSameType(this)) {
// If we're zoomed, so that we don't maintain the invariant that
// mImageIsResized if and only if its displayed width/height fit in
// mVisibleWidth/mVisibleHeight, then we may need to switch to/from the
// overflowingVertical class here, because our viewport size may have
// changed and we don't plan to adjust the image size to compensate. Since
// mImageIsResized it has a "height" attribute set, and we can just get the
// displayed image height by getting .height on the HTMLImageElement.
HTMLImageElement* img = HTMLImageElement::FromContent(mImageContent);
uint32_t imageHeight = img->Height();
nsDOMTokenList* classList = img->ClassList();
ErrorResult ignored;
if (imageHeight > mVisibleHeight) {
classList->Add(NS_LITERAL_STRING("overflowingVertical"), ignored);
} else {
classList->Remove(NS_LITERAL_STRING("overflowingVertical"), ignored);
}
ignored.SuppressException();
return;
}
// Keep image content alive while changing the attributes.
nsCOMPtr<Element> imageContent = mImageContent;
nsCOMPtr<nsIDOMHTMLImageElement> image = do_QueryInterface(imageContent);
image->SetWidth(std::max(1, NSToCoordFloor(GetRatio() * mImageWidth)));
image->SetHeight(std::max(1, NSToCoordFloor(GetRatio() * mImageHeight)));
// The view might have been scrolled when zooming in, scroll back to the
// origin now that we're showing a shrunk-to-window version.
ScrollImageTo(0, 0, false);
if (!mImageContent) {
// ScrollImageTo flush destroyed our content.
return;
}
SetModeClass(eShrinkToFit);
mImageIsResized = true;
UpdateTitleAndCharset();
}
