The Tor Browser: layout/forms/nsProgressFrame.cpp@8bccb770b82d (annotated)

layout/forms/nsProgressFrame.cpp@8bccb770b82d (annotated)

layout/forms/nsProgressFrame.cpp

Wed, 31 Dec 2014 13:27:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 13:27:57 +0100
branch: TOR_BUG_3246
changeset 6: 8bccb770b82d
permissions: -rw-r--r--

Ignore runtime configuration files generated during quality assurance.

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include "nsProgressFrame.h"
 #include "nsIContent.h"
 #include "nsPresContext.h"
 #include "nsGkAtoms.h"
 #include "nsNameSpaceManager.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"
 #include "mozilla/dom/HTMLProgressElement.h"
 #include "nsContentList.h"
 #include "nsStyleSet.h"
 #include "nsThemeConstants.h"
 #include <algorithm>
 using namespace mozilla::dom;
 nsIFrame*
 NS_NewProgressFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
 {
   return new (aPresShell) nsProgressFrame(aContext);
 }
 NS_IMPL_FRAMEARENA_HELPERS(nsProgressFrame)
 nsProgressFrame::nsProgressFrame(nsStyleContext* aContext)
   : nsContainerFrame(aContext)
   , mBarDiv(nullptr)
 {
 }
 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)
 {
   // Create the progress bar div.
   nsCOMPtr<nsIDocument> doc = mContent->GetDocument();
   mBarDiv = doc->CreateHTMLElement(nsGkAtoms::div);
   // 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,
                               StyleContext(), mBarDiv->AsElement());
   if (!aElements.AppendElement(ContentInfo(mBarDiv, newStyleContext))) {
     return NS_ERROR_OUT_OF_MEMORY;
   }
   return NS_OK;
 }
 void
 nsProgressFrame::AppendAnonymousContentTo(nsBaseContentList& aElements,
                                           uint32_t aFilter)
 {
   aElements.MaybeAppendElement(mBarDiv);
 }
 NS_QUERYFRAME_HEAD(nsProgressFrame)
   NS_QUERYFRAME_ENTRY(nsProgressFrame)
   NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
 NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
 void
 nsProgressFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                                   const nsRect&           aDirtyRect,
                                   const nsDisplayListSet& aLists)
 {
   BuildDisplayListForInline(aBuilder, aDirtyRect, aLists);
 }
 nsresult 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.ComputedPhysicalBorderPadding().LeftRight();
   aDesiredSize.Height() = aReflowState.ComputedHeight() +
                         aReflowState.ComputedPhysicalBorderPadding().TopBottom();
   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 = StyleDisplay()->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.ComputedPhysicalBorderPadding().left;
   nscoord yoffset = aReflowState.ComputedPhysicalBorderPadding().top;
   double position = static_cast<HTMLProgressElement*>(mContent)->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 && StyleVisibility()->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.ComputedPhysicalMargin().TopBottom() +
               reflowState.ComputedPhysicalBorderPadding().TopBottom();
       size = std::max(size, 0);
       reflowState.SetComputedHeight(size);
     } else {
       size -= reflowState.ComputedPhysicalMargin().LeftRight() +
               reflowState.ComputedPhysicalBorderPadding().LeftRight();
       size = std::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.ComputedPhysicalMargin().left;
   yoffset += reflowState.ComputedPhysicalMargin().top;
   nsHTMLReflowMetrics barDesiredSize(aReflowState);
   ReflowChild(aBarFrame, aPresContext, barDesiredSize, reflowState, xoffset,
               yoffset, 0, aStatus);
   FinishReflowChild(aBarFrame, aPresContext, barDesiredSize, &reflowState,
                     xoffset, yoffset, 0);
 }
 nsresult
 nsProgressFrame::AttributeChanged(int32_t  aNameSpaceID,
                                   nsIAtom* aAttribute,
                                   int32_t  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);
     InvalidateFrame();
   }
   return nsContainerFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
 }
 nsSize
 nsProgressFrame::ComputeAutoSize(nsRenderingContext *aRenderingContext,
                                  nsSize aCBSize, nscoord aAvailableWidth,
                                  nsSize aMargin, nsSize aBorder,
                                  nsSize aPadding, bool aShrinkWrap)
 {
   nsSize autoSize;
   autoSize.height = autoSize.width =
     NSToCoordRound(StyleFont()->mFont.size *
                    nsLayoutUtils::FontSizeInflationFor(this)); // 1em
   if (StyleDisplay()->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 (StyleDisplay()->mOrient == NS_STYLE_ORIENT_AUTO ||
       StyleDisplay()->mOrient == NS_STYLE_ORIENT_HORIZONTAL) {
     // The orientation is 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 StyleDisplay()->mAppearance == NS_THEME_PROGRESSBAR &&
          mBarDiv->GetPrimaryFrame()->StyleDisplay()->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);
 }
 Element*
 nsProgressFrame::GetPseudoElement(nsCSSPseudoElements::Type aType)
 {
   if (aType == nsCSSPseudoElements::ePseudo_mozProgressBar) {
     return mBarDiv;
   }
   return nsContainerFrame::GetPseudoElement(aType);
 }

The Tor Browser / annotate

layout/forms/nsProgressFrame.cpp@8bccb770b82d (annotated)

layout/forms/nsProgressFrame.cpp