layout/generic/nsPageContentFrame.cpp@6474c204b198 (annotated)
layout/generic/nsPageContentFrame.cpp
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | #include "nsPageContentFrame.h" |
| michael@0 | 6 | #include "nsCSSFrameConstructor.h" |
| michael@0 | 7 | #include "nsPresContext.h" |
| michael@0 | 8 | #include "nsGkAtoms.h" |
| michael@0 | 9 | #include "nsIPresShell.h" |
| michael@0 | 10 | #include "nsSimplePageSequenceFrame.h" |
| michael@0 | 11 | |
| michael@0 | 12 | nsIFrame* |
| michael@0 | 13 | NS_NewPageContentFrame(nsIPresShell* aPresShell, nsStyleContext* aContext) |
| michael@0 | 14 | { |
| michael@0 | 15 | return new (aPresShell) nsPageContentFrame(aContext); |
| michael@0 | 16 | } |
| michael@0 | 17 | |
| michael@0 | 18 | NS_IMPL_FRAMEARENA_HELPERS(nsPageContentFrame) |
| michael@0 | 19 | |
| michael@0 | 20 | nsresult |
| michael@0 | 21 | nsPageContentFrame::Reflow(nsPresContext* aPresContext, |
| michael@0 | 22 | nsHTMLReflowMetrics& aDesiredSize, |
| michael@0 | 23 | const nsHTMLReflowState& aReflowState, |
| michael@0 | 24 | nsReflowStatus& aStatus) |
| michael@0 | 25 | { |
| michael@0 | 26 | DO_GLOBAL_REFLOW_COUNT("nsPageContentFrame"); |
| michael@0 | 27 | DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus); |
| michael@0 | 28 | aStatus = NS_FRAME_COMPLETE; // initialize out parameter |
| michael@0 | 29 | nsresult rv = NS_OK; |
| michael@0 | 30 | |
| michael@0 | 31 | if (GetPrevInFlow() && (GetStateBits() & NS_FRAME_FIRST_REFLOW)) { |
| michael@0 | 32 | nsresult rv = aPresContext->PresShell()->FrameConstructor() |
| michael@0 | 33 | ->ReplicateFixedFrames(this); |
| michael@0 | 34 | NS_ENSURE_SUCCESS(rv, rv); |
| michael@0 | 35 | } |
| michael@0 | 36 | |
| michael@0 | 37 | // Set our size up front, since some parts of reflow depend on it |
| michael@0 | 38 | // being already set. Note that the computed height may be |
| michael@0 | 39 | // unconstrained; that's ok. Consumers should watch out for that. |
| michael@0 | 40 | nsSize maxSize(aReflowState.ComputedWidth(), |
| michael@0 | 41 | aReflowState.ComputedHeight()); |
| michael@0 | 42 | SetSize(maxSize); |
| michael@0 | 43 | |
| michael@0 | 44 | // A PageContentFrame must always have one child: the canvas frame. |
| michael@0 | 45 | // Resize our frame allowing it only to be as big as we are |
| michael@0 | 46 | // XXX Pay attention to the page's border and padding... |
| michael@0 | 47 | if (mFrames.NotEmpty()) { |
| michael@0 | 48 | nsIFrame* frame = mFrames.FirstChild(); |
| michael@0 | 49 | nsHTMLReflowState kidReflowState(aPresContext, aReflowState, frame, maxSize); |
| michael@0 | 50 | kidReflowState.SetComputedHeight(maxSize.height); |
| michael@0 | 51 | |
| michael@0 | 52 | // Reflow the page content area |
| michael@0 | 53 | rv = ReflowChild(frame, aPresContext, aDesiredSize, kidReflowState, 0, 0, 0, aStatus); |
| michael@0 | 54 | NS_ENSURE_SUCCESS(rv, rv); |
| michael@0 | 55 | |
| michael@0 | 56 | // The document element's background should cover the entire canvas, so |
| michael@0 | 57 | // take into account the combined area and any space taken up by |
| michael@0 | 58 | // absolutely positioned elements |
| michael@0 | 59 | nsMargin padding(0,0,0,0); |
| michael@0 | 60 | |
| michael@0 | 61 | // XXXbz this screws up percentage padding (sets padding to zero |
| michael@0 | 62 | // in the percentage padding case) |
| michael@0 | 63 | kidReflowState.mStylePadding->GetPadding(padding); |
| michael@0 | 64 | |
| michael@0 | 65 | // This is for shrink-to-fit, and therefore we want to use the |
| michael@0 | 66 | // scrollable overflow, since the purpose of shrink to fit is to |
| michael@0 | 67 | // make the content that ought to be reachable (represented by the |
| michael@0 | 68 | // scrollable overflow) fit in the page. |
| michael@0 | 69 | if (frame->HasOverflowAreas()) { |
| michael@0 | 70 | // The background covers the content area and padding area, so check |
| michael@0 | 71 | // for children sticking outside the child frame's padding edge |
| michael@0 | 72 | nscoord xmost = aDesiredSize.ScrollableOverflow().XMost(); |
| michael@0 | 73 | if (xmost > aDesiredSize.Width()) { |
| michael@0 | 74 | nscoord widthToFit = xmost + padding.right + |
| michael@0 | 75 | kidReflowState.mStyleBorder->GetComputedBorderWidth(NS_SIDE_RIGHT); |
| michael@0 | 76 | float ratio = float(maxSize.width) / widthToFit; |
| michael@0 | 77 | NS_ASSERTION(ratio >= 0.0 && ratio < 1.0, "invalid shrink-to-fit ratio"); |
| michael@0 | 78 | mPD->mShrinkToFitRatio = std::min(mPD->mShrinkToFitRatio, ratio); |
| michael@0 | 79 | } |
| michael@0 | 80 | } |
| michael@0 | 81 | |
| michael@0 | 82 | // Place and size the child |
| michael@0 | 83 | FinishReflowChild(frame, aPresContext, aDesiredSize, &kidReflowState, 0, 0, 0); |
| michael@0 | 84 | |
| michael@0 | 85 | NS_ASSERTION(aPresContext->IsDynamic() || !NS_FRAME_IS_FULLY_COMPLETE(aStatus) || |
| michael@0 | 86 | !frame->GetNextInFlow(), "bad child flow list"); |
| michael@0 | 87 | } |
| michael@0 | 88 | |
| michael@0 | 89 | // Reflow our fixed frames |
| michael@0 | 90 | nsReflowStatus fixedStatus = NS_FRAME_COMPLETE; |
| michael@0 | 91 | ReflowAbsoluteFrames(aPresContext, aDesiredSize, aReflowState, fixedStatus); |
| michael@0 | 92 | NS_ASSERTION(NS_FRAME_IS_COMPLETE(fixedStatus), "fixed frames can be truncated, but not incomplete"); |
| michael@0 | 93 | |
| michael@0 | 94 | // Return our desired size |
| michael@0 | 95 | aDesiredSize.Width() = aReflowState.ComputedWidth(); |
| michael@0 | 96 | if (aReflowState.ComputedHeight() != NS_UNCONSTRAINEDSIZE) { |
| michael@0 | 97 | aDesiredSize.Height() = aReflowState.ComputedHeight(); |
| michael@0 | 98 | } |
| michael@0 | 99 | |
| michael@0 | 100 | FinishAndStoreOverflow(&aDesiredSize); |
| michael@0 | 101 | |
| michael@0 | 102 | NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize); |
| michael@0 | 103 | return NS_OK; |
| michael@0 | 104 | } |
| michael@0 | 105 | |
| michael@0 | 106 | nsIAtom* |
| michael@0 | 107 | nsPageContentFrame::GetType() const |
| michael@0 | 108 | { |
| michael@0 | 109 | return nsGkAtoms::pageContentFrame; |
| michael@0 | 110 | } |
| michael@0 | 111 | |
| michael@0 | 112 | #ifdef DEBUG_FRAME_DUMP |
| michael@0 | 113 | nsresult |
| michael@0 | 114 | nsPageContentFrame::GetFrameName(nsAString& aResult) const |
| michael@0 | 115 | { |
| michael@0 | 116 | return MakeFrameName(NS_LITERAL_STRING("PageContent"), aResult); |
| michael@0 | 117 | } |
| michael@0 | 118 | #endif |
