gecko/layout/forms/nsProgressFrame.cpp
L. David Baron 5eb8920348 Switch nsLayoutUtils inflation methods to the new setup with state on the pres context. (Bug 706609, patch 5) r=roc
This is the third of three patches to rework the way we handle getting
the font inflation container and width data during reflow, which are
needed so that we can sometimes honor inflation during intrinsic width
calculation (which we need to do to make some form controls inflate
correctly).
2012-01-24 17:21:29 -08:00

329 lines
12 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 Mozilla Foundation
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Mounir Lamouri <mounir.lamouri@mozilla.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
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#include "nsProgressFrame.h"
#include "nsIDOMHTMLProgressElement.h"
#include "nsIContent.h"
#include "prtypes.h"
#include "nsPresContext.h"
#include "nsGkAtoms.h"
#include "nsINameSpaceManager.h"
#include "nsIDocument.h"
#include "nsIPresShell.h"
#include "nsNodeInfoManager.h"
#include "nsINodeInfo.h"
#include "nsContentCreatorFunctions.h"
#include "nsContentUtils.h"
#include "nsFormControlFrame.h"
#include "nsFontMetrics.h"
#include "mozilla/dom/Element.h"
nsIFrame*
NS_NewProgressFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsProgressFrame(aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(nsProgressFrame)
nsProgressFrame::nsProgressFrame(nsStyleContext* aContext)
: nsContainerFrame(aContext)
, mBarDiv(nsnull)
{
}
nsProgressFrame::~nsProgressFrame()
{
}
void
nsProgressFrame::DestroyFrom(nsIFrame* aDestructRoot)
{
NS_ASSERTION(!GetPrevContinuation(),
"nsProgressFrame should not have continuations; if it does we "
"need to call RegUnregAccessKey only for the first.");
nsFormControlFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), false);
nsContentUtils::DestroyAnonymousContent(&mBarDiv);
nsContainerFrame::DestroyFrom(aDestructRoot);
}
nsresult
nsProgressFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
{
// Get the NodeInfoManager and tag necessary to create the progress bar div.
nsCOMPtr<nsIDocument> doc = mContent->GetDocument();
nsCOMPtr<nsINodeInfo> nodeInfo;
nodeInfo = doc->NodeInfoManager()->GetNodeInfo(nsGkAtoms::div, nsnull,
kNameSpaceID_XHTML,
nsIDOMNode::ELEMENT_NODE);
NS_ENSURE_TRUE(nodeInfo, NS_ERROR_OUT_OF_MEMORY);
// Create the div.
nsresult rv = NS_NewHTMLElement(getter_AddRefs(mBarDiv), nodeInfo.forget(),
mozilla::dom::NOT_FROM_PARSER);
NS_ENSURE_SUCCESS(rv, rv);
// Associate ::-moz-progress-bar pseudo-element to the anonymous child.
nsCSSPseudoElements::Type pseudoType = nsCSSPseudoElements::ePseudo_mozProgressBar;
nsRefPtr<nsStyleContext> newStyleContext = PresContext()->StyleSet()->
ResolvePseudoElementStyle(mContent->AsElement(), pseudoType,
GetStyleContext());
if (!aElements.AppendElement(ContentInfo(mBarDiv, newStyleContext))) {
return NS_ERROR_OUT_OF_MEMORY;
}
return NS_OK;
}
void
nsProgressFrame::AppendAnonymousContentTo(nsBaseContentList& aElements,
PRUint32 aFilter)
{
aElements.MaybeAppendElement(mBarDiv);
}
NS_QUERYFRAME_HEAD(nsProgressFrame)
NS_QUERYFRAME_ENTRY(nsProgressFrame)
NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
NS_IMETHODIMP
nsProgressFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
return BuildDisplayListForInline(aBuilder, aDirtyRect, aLists);
}
NS_IMETHODIMP nsProgressFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsProgressFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
NS_ASSERTION(mBarDiv, "Progress bar div must exist!");
NS_ASSERTION(!GetPrevContinuation(),
"nsProgressFrame should not have continuations; if it does we "
"need to call RegUnregAccessKey only for the first.");
if (mState & NS_FRAME_FIRST_REFLOW) {
nsFormControlFrame::RegUnRegAccessKey(this, true);
}
nsIFrame* barFrame = mBarDiv->GetPrimaryFrame();
NS_ASSERTION(barFrame, "The progress frame should have a child with a frame!");
ReflowBarFrame(barFrame, aPresContext, aReflowState, aStatus);
aDesiredSize.width = aReflowState.ComputedWidth() +
aReflowState.mComputedBorderPadding.LeftRight();
aDesiredSize.height = aReflowState.ComputedHeight() +
aReflowState.mComputedBorderPadding.TopBottom();
aDesiredSize.height = NS_CSS_MINMAX(aDesiredSize.height,
aReflowState.mComputedMinHeight,
aReflowState.mComputedMaxHeight);
aDesiredSize.SetOverflowAreasToDesiredBounds();
ConsiderChildOverflow(aDesiredSize.mOverflowAreas, barFrame);
FinishAndStoreOverflow(&aDesiredSize);
aStatus = NS_FRAME_COMPLETE;
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
return NS_OK;
}
void
nsProgressFrame::ReflowBarFrame(nsIFrame* aBarFrame,
nsPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
bool vertical = GetStyleDisplay()->mOrient == NS_STYLE_ORIENT_VERTICAL;
nsHTMLReflowState reflowState(aPresContext, aReflowState, aBarFrame,
nsSize(aReflowState.ComputedWidth(),
NS_UNCONSTRAINEDSIZE));
nscoord size = vertical ? aReflowState.ComputedHeight()
: aReflowState.ComputedWidth();
nscoord xoffset = aReflowState.mComputedBorderPadding.left;
nscoord yoffset = aReflowState.mComputedBorderPadding.top;
double position;
nsCOMPtr<nsIDOMHTMLProgressElement> progressElement =
do_QueryInterface(mContent);
progressElement->GetPosition(&position);
// Force the bar's size to match the current progress.
// When indeterminate, the progress' size will be 100%.
if (position >= 0.0) {
size *= position;
}
if (!vertical && GetStyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL) {
xoffset += aReflowState.ComputedWidth() - size;
}
// The bar size is fixed in these cases:
// - the progress position is determined: the bar size is fixed according
// to it's value.
// - the progress position is indeterminate and the bar appearance should be
// shown as native: the bar size is forced to 100%.
// Otherwise (when the progress is indeterminate and the bar appearance isn't
// native), the bar size isn't fixed and can be set by the author.
if (position != -1 || ShouldUseNativeStyle()) {
if (vertical) {
// We want the bar to begin at the bottom.
yoffset += aReflowState.ComputedHeight() - size;
size -= reflowState.mComputedMargin.TopBottom() +
reflowState.mComputedBorderPadding.TopBottom();
size = NS_MAX(size, 0);
reflowState.SetComputedHeight(size);
} else {
size -= reflowState.mComputedMargin.LeftRight() +
reflowState.mComputedBorderPadding.LeftRight();
size = NS_MAX(size, 0);
reflowState.SetComputedWidth(size);
}
} else if (vertical) {
// For vertical progress bars, we need to position the bar specificly when
// the width isn't constrained (position == -1 and !ShouldUseNativeStyle())
// because aReflowState.ComputedHeight() - size == 0.
yoffset += aReflowState.ComputedHeight() - reflowState.ComputedHeight();
}
xoffset += reflowState.mComputedMargin.left;
yoffset += reflowState.mComputedMargin.top;
nsHTMLReflowMetrics barDesiredSize;
ReflowChild(aBarFrame, aPresContext, barDesiredSize, reflowState, xoffset,
yoffset, 0, aStatus);
FinishReflowChild(aBarFrame, aPresContext, &reflowState, barDesiredSize,
xoffset, yoffset, 0);
}
NS_IMETHODIMP
nsProgressFrame::AttributeChanged(PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType)
{
NS_ASSERTION(mBarDiv, "Progress bar div must exist!");
if (aNameSpaceID == kNameSpaceID_None &&
(aAttribute == nsGkAtoms::value || aAttribute == nsGkAtoms::max)) {
nsIFrame* barFrame = mBarDiv->GetPrimaryFrame();
NS_ASSERTION(barFrame, "The progress frame should have a child with a frame!");
PresContext()->PresShell()->FrameNeedsReflow(barFrame, nsIPresShell::eResize,
NS_FRAME_IS_DIRTY);
Invalidate(GetVisualOverflowRectRelativeToSelf());
}
return nsContainerFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
}
nsSize
nsProgressFrame::ComputeAutoSize(nsRenderingContext *aRenderingContext,
nsSize aCBSize, nscoord aAvailableWidth,
nsSize aMargin, nsSize aBorder,
nsSize aPadding, bool aShrinkWrap)
{
float inflation =
nsLayoutUtils::FontSizeInflationFor(this, nsLayoutUtils::eInReflow);
nsRefPtr<nsFontMetrics> fontMet;
NS_ENSURE_SUCCESS(nsLayoutUtils::GetFontMetricsForFrame(this,
getter_AddRefs(fontMet),
inflation),
nsSize(0, 0));
nsSize autoSize;
autoSize.height = autoSize.width = fontMet->Font().size; // 1em
if (GetStyleDisplay()->mOrient == NS_STYLE_ORIENT_VERTICAL) {
autoSize.height *= 10; // 10em
} else {
autoSize.width *= 10; // 10em
}
return autoSize;
}
nscoord
nsProgressFrame::GetMinWidth(nsRenderingContext *aRenderingContext)
{
nsRefPtr<nsFontMetrics> fontMet;
NS_ENSURE_SUCCESS(
nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fontMet)), 0);
nscoord minWidth = fontMet->Font().size; // 1em
if (GetStyleDisplay()->mOrient == NS_STYLE_ORIENT_HORIZONTAL) {
minWidth *= 10; // 10em
}
return minWidth;
}
nscoord
nsProgressFrame::GetPrefWidth(nsRenderingContext *aRenderingContext)
{
return GetMinWidth(aRenderingContext);
}
bool
nsProgressFrame::ShouldUseNativeStyle() const
{
// Use the native style if these conditions are satisfied:
// - both frames use the native appearance;
// - neither frame has author specified rules setting the border or the
// background.
return GetStyleDisplay()->mAppearance == NS_THEME_PROGRESSBAR &&
mBarDiv->GetPrimaryFrame()->GetStyleDisplay()->mAppearance == NS_THEME_PROGRESSBAR_CHUNK &&
!PresContext()->HasAuthorSpecifiedRules(const_cast<nsProgressFrame*>(this),
NS_AUTHOR_SPECIFIED_BORDER | NS_AUTHOR_SPECIFIED_BACKGROUND) &&
!PresContext()->HasAuthorSpecifiedRules(mBarDiv->GetPrimaryFrame(),
NS_AUTHOR_SPECIFIED_BORDER | NS_AUTHOR_SPECIFIED_BACKGROUND);
}