298 lines
9.7 KiB
C++
298 lines
9.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsMeterFrame.h"
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#include "nsIContent.h"
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#include "nsPresContext.h"
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#include "nsGkAtoms.h"
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#include "nsNameSpaceManager.h"
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#include "nsIDocument.h"
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#include "nsIPresShell.h"
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#include "nsNodeInfoManager.h"
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#include "nsContentCreatorFunctions.h"
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#include "nsContentUtils.h"
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#include "nsFormControlFrame.h"
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#include "nsFontMetrics.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/HTMLMeterElement.h"
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#include "nsContentList.h"
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#include "nsStyleSet.h"
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#include "nsThemeConstants.h"
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#include <algorithm>
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using namespace mozilla;
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using mozilla::dom::Element;
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using mozilla::dom::HTMLMeterElement;
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nsIFrame*
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NS_NewMeterFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
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{
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return new (aPresShell) nsMeterFrame(aContext);
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsMeterFrame)
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nsMeterFrame::nsMeterFrame(nsStyleContext* aContext)
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: nsContainerFrame(aContext)
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, mBarDiv(nullptr)
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{
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}
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nsMeterFrame::~nsMeterFrame()
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{
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}
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void
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nsMeterFrame::DestroyFrom(nsIFrame* aDestructRoot)
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{
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NS_ASSERTION(!GetPrevContinuation(),
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"nsMeterFrame should not have continuations; if it does we "
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"need to call RegUnregAccessKey only for the first.");
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nsFormControlFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), false);
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nsContentUtils::DestroyAnonymousContent(&mBarDiv);
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nsContainerFrame::DestroyFrom(aDestructRoot);
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}
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nsIAtom*
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nsMeterFrame::GetType() const
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{
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return nsGkAtoms::meterFrame;
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}
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nsresult
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nsMeterFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
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{
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// Get the NodeInfoManager and tag necessary to create the meter bar div.
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nsCOMPtr<nsIDocument> doc = mContent->GetComposedDoc();
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// Create the div.
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mBarDiv = doc->CreateHTMLElement(nsGkAtoms::div);
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// Associate ::-moz-meter-bar pseudo-element to the anonymous child.
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nsCSSPseudoElements::Type pseudoType = nsCSSPseudoElements::ePseudo_mozMeterBar;
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RefPtr<nsStyleContext> newStyleContext = PresContext()->StyleSet()->
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ResolvePseudoElementStyle(mContent->AsElement(), pseudoType,
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StyleContext(), mBarDiv->AsElement());
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if (!aElements.AppendElement(ContentInfo(mBarDiv, newStyleContext))) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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return NS_OK;
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}
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void
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nsMeterFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
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uint32_t aFilter)
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{
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if (mBarDiv) {
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aElements.AppendElement(mBarDiv);
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}
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}
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NS_QUERYFRAME_HEAD(nsMeterFrame)
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NS_QUERYFRAME_ENTRY(nsMeterFrame)
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NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
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NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
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void
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nsMeterFrame::Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus)
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{
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MarkInReflow();
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DO_GLOBAL_REFLOW_COUNT("nsMeterFrame");
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DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
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NS_ASSERTION(mBarDiv, "Meter bar div must exist!");
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NS_ASSERTION(!GetPrevContinuation(),
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"nsMeterFrame should not have continuations; if it does we "
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"need to call RegUnregAccessKey only for the first.");
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if (mState & NS_FRAME_FIRST_REFLOW) {
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nsFormControlFrame::RegUnRegAccessKey(this, true);
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}
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nsIFrame* barFrame = mBarDiv->GetPrimaryFrame();
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NS_ASSERTION(barFrame, "The meter frame should have a child with a frame!");
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ReflowBarFrame(barFrame, aPresContext, aReflowState, aStatus);
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aDesiredSize.SetSize(aReflowState.GetWritingMode(),
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aReflowState.ComputedSizeWithBorderPadding());
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aDesiredSize.SetOverflowAreasToDesiredBounds();
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ConsiderChildOverflow(aDesiredSize.mOverflowAreas, barFrame);
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FinishAndStoreOverflow(&aDesiredSize);
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aStatus = NS_FRAME_COMPLETE;
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NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
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}
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void
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nsMeterFrame::ReflowBarFrame(nsIFrame* aBarFrame,
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nsPresContext* aPresContext,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus)
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{
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bool vertical = ResolvedOrientationIsVertical();
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WritingMode wm = aBarFrame->GetWritingMode();
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LogicalSize availSize = aReflowState.ComputedSize(wm);
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availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
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nsHTMLReflowState reflowState(aPresContext, aReflowState,
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aBarFrame, availSize);
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nscoord size = vertical ? aReflowState.ComputedHeight()
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: aReflowState.ComputedWidth();
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nscoord xoffset = aReflowState.ComputedPhysicalBorderPadding().left;
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nscoord yoffset = aReflowState.ComputedPhysicalBorderPadding().top;
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// NOTE: Introduce a new function getPosition in the content part ?
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HTMLMeterElement* meterElement = static_cast<HTMLMeterElement*>(mContent);
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double max = meterElement->Max();
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double min = meterElement->Min();
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double value = meterElement->Value();
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double position = max - min;
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position = position != 0 ? (value - min) / position : 1;
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size = NSToCoordRound(size * position);
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if (!vertical && (wm.IsVertical() ? wm.IsVerticalRL() : !wm.IsBidiLTR())) {
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xoffset += aReflowState.ComputedWidth() - size;
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}
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// The bar position is *always* constrained.
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if (vertical) {
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// We want the bar to begin at the bottom.
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yoffset += aReflowState.ComputedHeight() - size;
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size -= reflowState.ComputedPhysicalMargin().TopBottom() +
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reflowState.ComputedPhysicalBorderPadding().TopBottom();
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size = std::max(size, 0);
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reflowState.SetComputedHeight(size);
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} else {
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size -= reflowState.ComputedPhysicalMargin().LeftRight() +
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reflowState.ComputedPhysicalBorderPadding().LeftRight();
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size = std::max(size, 0);
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reflowState.SetComputedWidth(size);
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}
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xoffset += reflowState.ComputedPhysicalMargin().left;
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yoffset += reflowState.ComputedPhysicalMargin().top;
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nsHTMLReflowMetrics barDesiredSize(reflowState);
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ReflowChild(aBarFrame, aPresContext, barDesiredSize, reflowState, xoffset,
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yoffset, 0, aStatus);
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FinishReflowChild(aBarFrame, aPresContext, barDesiredSize, &reflowState,
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xoffset, yoffset, 0);
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}
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nsresult
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nsMeterFrame::AttributeChanged(int32_t aNameSpaceID,
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nsIAtom* aAttribute,
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int32_t aModType)
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{
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NS_ASSERTION(mBarDiv, "Meter bar div must exist!");
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if (aNameSpaceID == kNameSpaceID_None &&
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(aAttribute == nsGkAtoms::value ||
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aAttribute == nsGkAtoms::max ||
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aAttribute == nsGkAtoms::min )) {
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nsIFrame* barFrame = mBarDiv->GetPrimaryFrame();
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NS_ASSERTION(barFrame, "The meter frame should have a child with a frame!");
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PresContext()->PresShell()->FrameNeedsReflow(barFrame,
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nsIPresShell::eResize,
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NS_FRAME_IS_DIRTY);
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InvalidateFrame();
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}
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return nsContainerFrame::AttributeChanged(aNameSpaceID, aAttribute,
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aModType);
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}
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LogicalSize
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nsMeterFrame::ComputeAutoSize(nsRenderingContext *aRenderingContext,
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WritingMode aWM,
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const LogicalSize& aCBSize,
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nscoord aAvailableISize,
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const LogicalSize& aMargin,
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const LogicalSize& aBorder,
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const LogicalSize& aPadding,
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bool aShrinkWrap)
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{
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RefPtr<nsFontMetrics> fontMet;
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NS_ENSURE_SUCCESS(nsLayoutUtils::GetFontMetricsForFrame(this,
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getter_AddRefs(fontMet)),
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LogicalSize(aWM));
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const WritingMode wm = GetWritingMode();
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LogicalSize autoSize(wm);
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autoSize.BSize(wm) = autoSize.ISize(wm) = fontMet->Font().size; // 1em
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if (ResolvedOrientationIsVertical() == wm.IsVertical()) {
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autoSize.ISize(wm) *= 5; // 5em
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} else {
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autoSize.BSize(wm) *= 5; // 5em
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}
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return autoSize.ConvertTo(aWM, wm);
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}
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nscoord
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nsMeterFrame::GetMinISize(nsRenderingContext *aRenderingContext)
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{
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RefPtr<nsFontMetrics> fontMet;
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NS_ENSURE_SUCCESS(
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nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fontMet)), 0);
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nscoord minISize = fontMet->Font().size; // 1em
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if (ResolvedOrientationIsVertical() == GetWritingMode().IsVertical()) {
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// The orientation is inline
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minISize *= 5; // 5em
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}
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return minISize;
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}
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nscoord
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nsMeterFrame::GetPrefISize(nsRenderingContext *aRenderingContext)
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{
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return GetMinISize(aRenderingContext);
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}
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bool
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nsMeterFrame::ShouldUseNativeStyle() const
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{
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nsIFrame* barFrame = mBarDiv->GetPrimaryFrame();
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// Use the native style if these conditions are satisfied:
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// - both frames use the native appearance;
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// - neither frame has author specified rules setting the border or the
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// background.
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return StyleDisplay()->mAppearance == NS_THEME_METERBAR &&
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!PresContext()->HasAuthorSpecifiedRules(this,
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NS_AUTHOR_SPECIFIED_BORDER | NS_AUTHOR_SPECIFIED_BACKGROUND) &&
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barFrame &&
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barFrame->StyleDisplay()->mAppearance == NS_THEME_METERBAR_CHUNK &&
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!PresContext()->HasAuthorSpecifiedRules(barFrame,
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NS_AUTHOR_SPECIFIED_BORDER | NS_AUTHOR_SPECIFIED_BACKGROUND);
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}
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Element*
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nsMeterFrame::GetPseudoElement(nsCSSPseudoElements::Type aType)
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{
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if (aType == nsCSSPseudoElements::ePseudo_mozMeterBar) {
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return mBarDiv;
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}
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return nsContainerFrame::GetPseudoElement(aType);
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}
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