tor-browser

The Tor Browser
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nsRubyTextFrame.cpp (2792B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 /* rendering object for CSS "display: ruby-text" */
      8 
      9 #include "nsRubyTextFrame.h"
     10 
     11 #include "mozilla/ComputedStyle.h"
     12 #include "mozilla/PresShell.h"
     13 #include "mozilla/WritingModes.h"
     14 #include "nsLineLayout.h"
     15 #include "nsPresContext.h"
     16 
     17 using namespace mozilla;
     18 
     19 //----------------------------------------------------------------------
     20 
     21 // Frame class boilerplate
     22 // =======================
     23 
     24 NS_QUERYFRAME_HEAD(nsRubyTextFrame)
     25  NS_QUERYFRAME_ENTRY(nsRubyTextFrame)
     26 NS_QUERYFRAME_TAIL_INHERITING(nsRubyContentFrame)
     27 
     28 NS_IMPL_FRAMEARENA_HELPERS(nsRubyTextFrame)
     29 
     30 nsContainerFrame* NS_NewRubyTextFrame(PresShell* aPresShell,
     31                                      ComputedStyle* aStyle) {
     32  return new (aPresShell) nsRubyTextFrame(aStyle, aPresShell->GetPresContext());
     33 }
     34 
     35 //----------------------------------------------------------------------
     36 
     37 // nsRubyTextFrame Method Implementations
     38 // ======================================
     39 
     40 /* virtual */
     41 bool nsRubyTextFrame::CanContinueTextRun() const { return false; }
     42 
     43 #ifdef DEBUG_FRAME_DUMP
     44 nsresult nsRubyTextFrame::GetFrameName(nsAString& aResult) const {
     45  return MakeFrameName(u"RubyText"_ns, aResult);
     46 }
     47 #endif
     48 
     49 /* virtual */
     50 void nsRubyTextFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
     51                                       const nsDisplayListSet& aLists) {
     52  if (IsCollapsed()) {
     53    return;
     54  }
     55 
     56  nsRubyContentFrame::BuildDisplayList(aBuilder, aLists);
     57 }
     58 
     59 /* virtual */
     60 void nsRubyTextFrame::Reflow(nsPresContext* aPresContext,
     61                             ReflowOutput& aDesiredSize,
     62                             const ReflowInput& aReflowInput,
     63                             nsReflowStatus& aStatus) {
     64  // Even if we want to hide this frame, we have to reflow it first.
     65  // If we leave it dirty, changes to its content will never be
     66  // propagated to the ancestors, then it won't be displayed even if
     67  // the content is no longer the same, until next reflow triggered by
     68  // some other change. In general, we always reflow all the frames we
     69  // created. There might be other problems if we don't do that.
     70  nsRubyContentFrame::Reflow(aPresContext, aDesiredSize, aReflowInput, aStatus);
     71 
     72  if (IsCollapsed()) {
     73    // Reset the ISize. The BSize is not changed so that it won't
     74    // affect vertical positioning in unexpected way.
     75    WritingMode lineWM = aReflowInput.mLineLayout->GetWritingMode();
     76    aDesiredSize.ISize(lineWM) = 0;
     77    aDesiredSize.SetOverflowAreasToDesiredBounds();
     78  }
     79 }