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)
NS_QUERYFRAME_ENTRY(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 */
CanContinueTextRun() const41 bool nsRubyTextFrame::CanContinueTextRun() const { return false; }
42
43 #ifdef DEBUG_FRAME_DUMP
GetFrameName(nsAString & aResult) const44 nsresult nsRubyTextFrame::GetFrameName(nsAString& aResult) const {
45 return MakeFrameName(u"RubyText"_ns, aResult);
46 }
47 #endif
48
49 /* virtual */
BuildDisplayList(nsDisplayListBuilder * aBuilder,const nsDisplayListSet & aLists)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 */
Reflow(nsPresContext * aPresContext,ReflowOutput & aDesiredSize,const ReflowInput & aReflowInput,nsReflowStatus & aStatus)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 }
80