mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-06 12:43:53 +00:00
300 lines
9.7 KiB
C++
300 lines
9.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is mozilla.org code.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Vladimir Vukicevic <vladimir@pobox.com>
|
|
* Portions created by the Initial Developer are Copyright (C) 2004
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Vladimir Vukicevic <vladimir@pobox.com> (original author)
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either of the GNU General Public License Version 2 or later (the "GPL"),
|
|
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
#include "nsHTMLParts.h"
|
|
#include "nsCOMPtr.h"
|
|
#include "nsIServiceManager.h"
|
|
#include "nsLayoutAtoms.h"
|
|
|
|
#include "nsHTMLCanvasFrame.h"
|
|
#include "nsICanvasElement.h"
|
|
|
|
nsresult
|
|
NS_NewHTMLCanvasFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
|
|
{
|
|
nsHTMLCanvasFrame* it = new (aPresShell) nsHTMLCanvasFrame;
|
|
if (nsnull == it) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
*aNewFrame = it;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsHTMLCanvasFrame::nsHTMLCanvasFrame()
|
|
{
|
|
}
|
|
|
|
nsHTMLCanvasFrame::~nsHTMLCanvasFrame()
|
|
{
|
|
}
|
|
|
|
// We really want a PR_MINMAX to go along with PR_MIN/PR_MAX
|
|
#define MINMAX(_value,_min,_max) \
|
|
((_value) < (_min) \
|
|
? (_min) \
|
|
: ((_value) > (_max) \
|
|
? (_max) \
|
|
: (_value)))
|
|
|
|
NS_IMETHODIMP
|
|
nsHTMLCanvasFrame::Reflow(nsPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aMetrics,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
DO_GLOBAL_REFLOW_COUNT("nsHTMLCanvasFrame", aReflowState.reason);
|
|
DISPLAY_REFLOW(aPresContext, this, aReflowState, aMetrics, aStatus);
|
|
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
|
|
("enter nsHTMLCanvasFrame::Reflow: availSize=%d,%d",
|
|
aReflowState.availableWidth, aReflowState.availableHeight));
|
|
|
|
NS_PRECONDITION(mState & NS_FRAME_IN_REFLOW, "frame is not in reflow");
|
|
|
|
aStatus = NS_FRAME_COMPLETE;
|
|
|
|
nsCOMPtr<nsICanvasElement> canvas(do_QueryInterface(GetContent()));
|
|
NS_ENSURE_TRUE(canvas, NS_ERROR_FAILURE);
|
|
|
|
nsresult rv = canvas->GetCanvasImageContainer(getter_AddRefs(mImageContainer));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
float p2t = GetPresContext()->PixelsToTwips();
|
|
|
|
if (mImageContainer) {
|
|
PRInt32 w, h;
|
|
mImageContainer->GetWidth(&w);
|
|
mImageContainer->GetHeight(&h);
|
|
|
|
mCanvasSize.SizeTo(NSIntPixelsToTwips(w, p2t), NSIntPixelsToTwips(h, p2t));
|
|
} else {
|
|
mCanvasSize.SizeTo(0, 0);
|
|
}
|
|
|
|
if (aReflowState.mComputedWidth == NS_INTRINSICSIZE)
|
|
aMetrics.width = mCanvasSize.width;
|
|
else
|
|
aMetrics.width = aReflowState.mComputedWidth;
|
|
|
|
if (aReflowState.mComputedHeight == NS_INTRINSICSIZE)
|
|
aMetrics.height = mCanvasSize.height;
|
|
else
|
|
aMetrics.height = aReflowState.mComputedHeight;
|
|
|
|
// clamp
|
|
aMetrics.height = MINMAX(aMetrics.height, aReflowState.mComputedMinHeight, aReflowState.mComputedMaxHeight);
|
|
aMetrics.width = MINMAX(aMetrics.width, aReflowState.mComputedMinWidth, aReflowState.mComputedMaxWidth);
|
|
|
|
// stash this away so we can compute our inner area later
|
|
mBorderPadding = aReflowState.mComputedBorderPadding;
|
|
|
|
aMetrics.width += mBorderPadding.left + mBorderPadding.right;
|
|
aMetrics.height += mBorderPadding.top + mBorderPadding.bottom;
|
|
|
|
if (mPrevInFlow) {
|
|
nscoord y = GetContinuationOffset(&aMetrics.width);
|
|
aMetrics.height -= y + mBorderPadding.top;
|
|
aMetrics.height = PR_MAX(0, aMetrics.height);
|
|
}
|
|
|
|
aMetrics.ascent = aMetrics.height;
|
|
aMetrics.descent = 0;
|
|
|
|
if (aMetrics.mComputeMEW) {
|
|
aMetrics.SetMEWToActualWidth(aReflowState.mStylePosition->mWidth.GetUnit());
|
|
}
|
|
|
|
if (aMetrics.mFlags & NS_REFLOW_CALC_MAX_WIDTH) {
|
|
aMetrics.mMaximumWidth = aMetrics.width;
|
|
}
|
|
aMetrics.mOverflowArea.SetRect(0, 0, aMetrics.width, aMetrics.height);
|
|
FinishAndStoreOverflow(&aMetrics);
|
|
|
|
if (mRect.width != aMetrics.width || mRect.height != aMetrics.height) {
|
|
Invalidate(nsRect(0, 0, mRect.width, mRect.height), PR_FALSE);
|
|
}
|
|
|
|
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
|
|
("exit nsHTMLCanvasFrame::Reflow: size=%d,%d",
|
|
aMetrics.width, aMetrics.height));
|
|
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aMetrics);
|
|
return NS_OK;
|
|
}
|
|
|
|
// FIXME taken from nsImageFrame, but then had splittable frame stuff
|
|
// removed. That needs to be fixed.
|
|
nsRect
|
|
nsHTMLCanvasFrame::GetInnerArea() const
|
|
{
|
|
nsRect r;
|
|
r.x = mBorderPadding.left;
|
|
r.y = mBorderPadding.top;
|
|
r.width = mRect.width - mBorderPadding.left - mBorderPadding.right;
|
|
r.height = mRect.height - mBorderPadding.top - mBorderPadding.bottom;
|
|
return r;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsHTMLCanvasFrame::Paint(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
const nsRect& aDirtyRect,
|
|
nsFramePaintLayer aWhichLayer,
|
|
PRUint32 aFlags)
|
|
{
|
|
PRBool isVisible;
|
|
if (NS_SUCCEEDED(IsVisibleForPainting(aPresContext, aRenderingContext, PR_TRUE, &isVisible)) &&
|
|
isVisible && mRect.width && mRect.height)
|
|
{
|
|
// If painting is suppressed, we need to stop image painting.
|
|
PRBool paintingSuppressed = PR_FALSE;
|
|
aPresContext->PresShell()->IsPaintingSuppressed(&paintingSuppressed);
|
|
if (paintingSuppressed) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// make sure that the rendering context has updated the
|
|
// image frame
|
|
nsCOMPtr<nsICanvasElement> canvas(do_QueryInterface(GetContent()));
|
|
NS_ENSURE_TRUE(canvas, NS_ERROR_FAILURE);
|
|
NS_ENSURE_SUCCESS(canvas->UpdateImageFrame(), NS_ERROR_FAILURE);
|
|
|
|
// from nsImageFrame
|
|
// First paint background and borders, which should be in the
|
|
// FOREGROUND or BACKGROUND paint layer if the element is
|
|
// inline-level or block-level, respectively (bug 36710). (See
|
|
// CSS2 9.5, which is the rationale for paint layers.)
|
|
const nsStyleDisplay* display = GetStyleDisplay();
|
|
nsFramePaintLayer backgroundLayer = display->IsBlockLevel()
|
|
? NS_FRAME_PAINT_LAYER_BACKGROUND
|
|
: NS_FRAME_PAINT_LAYER_FOREGROUND;
|
|
|
|
if (aWhichLayer == backgroundLayer) {
|
|
PaintSelf(aPresContext, aRenderingContext, aDirtyRect);
|
|
}
|
|
|
|
if ((aWhichLayer == NS_FRAME_PAINT_LAYER_FOREGROUND) && mImageContainer) {
|
|
nsRect inner = GetInnerArea();
|
|
nsRect src(0, 0, mCanvasSize.width, mCanvasSize.height);
|
|
|
|
aRenderingContext.DrawImage(mImageContainer, src, inner);
|
|
}
|
|
}
|
|
|
|
return nsFrame::Paint(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer, nsISelectionDisplay::DISPLAY_IMAGES);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsHTMLCanvasFrame::CanContinueTextRun(PRBool& aContinueTextRun) const
|
|
{
|
|
// stolen from nsImageFrame.cpp
|
|
// images really CAN continue text runs, but the textFrame needs to be
|
|
// educated before we can indicate that it can. For now, we handle the fixing up
|
|
// of max element widths in nsLineLayout::VerticalAlignFrames, but hopefully
|
|
// this can be eliminated and the textFrame can be convinced to handle inlines
|
|
// that take up space in text runs.
|
|
|
|
aContinueTextRun = PR_FALSE;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsHTMLCanvasFrame::GetContentForEvent(nsPresContext* aPresContext,
|
|
nsEvent* aEvent,
|
|
nsIContent** aContent)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aContent);
|
|
*aContent = GetContent();
|
|
NS_IF_ADDREF(*aContent);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsIAtom*
|
|
nsHTMLCanvasFrame::GetType() const
|
|
{
|
|
return nsLayoutAtoms::HTMLCanvasFrame;
|
|
}
|
|
|
|
// get the offset into the content area of the image where aImg starts if it is a continuation.
|
|
// from nsImageFrame
|
|
nscoord
|
|
nsHTMLCanvasFrame::GetContinuationOffset(nscoord* aWidth) const
|
|
{
|
|
nscoord offset = 0;
|
|
if (aWidth) {
|
|
*aWidth = 0;
|
|
}
|
|
|
|
if (mPrevInFlow) {
|
|
for (nsIFrame* prevInFlow = mPrevInFlow ; prevInFlow; prevInFlow = prevInFlow->GetPrevInFlow()) {
|
|
nsRect rect = prevInFlow->GetRect();
|
|
if (aWidth) {
|
|
*aWidth = rect.width;
|
|
}
|
|
offset += rect.height;
|
|
}
|
|
offset -= mBorderPadding.top;
|
|
offset = PR_MAX(0, offset);
|
|
}
|
|
return offset;
|
|
}
|
|
|
|
#ifdef ACCESSIBILITY
|
|
NS_IMETHODIMP
|
|
nsHTMLCanvasFrame::GetAccessible(nsIAccessible** aAccessible)
|
|
{
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
#endif
|
|
|
|
#ifdef DEBUG
|
|
NS_IMETHODIMP
|
|
nsHTMLCanvasFrame::GetFrameName(nsAString& aResult) const
|
|
{
|
|
return MakeFrameName(NS_LITERAL_STRING("HTMLCanvas"), aResult);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsHTMLCanvasFrame::List(nsPresContext* aPresContext, FILE* out, PRInt32 aIndent) const
|
|
{
|
|
IndentBy(out, aIndent);
|
|
ListTag(out);
|
|
fputs("\n", out);
|
|
return NS_OK;
|
|
}
|
|
#endif
|
|
|