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comparison: layout/forms/nsGfxCheckboxControlFrame.cpp
layout/forms/nsGfxCheckboxControlFrame.cpp
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| -1:000000000000 | 0:b0393ab7a83a |
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #include "nsGfxCheckboxControlFrame.h" | |
| 7 #include "nsIContent.h" | |
| 8 #include "nsCOMPtr.h" | |
| 9 #include "nsRenderingContext.h" | |
| 10 #include "nsIDOMHTMLInputElement.h" | |
| 11 #include "nsDisplayList.h" | |
| 12 #include <algorithm> | |
| 13 | |
| 14 using namespace mozilla; | |
| 15 | |
| 16 static void | |
| 17 PaintCheckMark(nsIFrame* aFrame, | |
| 18 nsRenderingContext* aCtx, | |
| 19 const nsRect& aDirtyRect, | |
| 20 nsPoint aPt) | |
| 21 { | |
| 22 nsRect rect(aPt, aFrame->GetSize()); | |
| 23 rect.Deflate(aFrame->GetUsedBorderAndPadding()); | |
| 24 | |
| 25 // Points come from the coordinates on a 7X7 unit box centered at 0,0 | |
| 26 const int32_t checkPolygonX[] = { -3, -1, 3, 3, -1, -3 }; | |
| 27 const int32_t checkPolygonY[] = { -1, 1, -3, -1, 3, 1 }; | |
| 28 const int32_t checkNumPoints = sizeof(checkPolygonX) / sizeof(int32_t); | |
| 29 const int32_t checkSize = 9; // 2 units of padding on either side | |
| 30 // of the 7x7 unit checkmark | |
| 31 | |
| 32 // Scale the checkmark based on the smallest dimension | |
| 33 nscoord paintScale = std::min(rect.width, rect.height) / checkSize; | |
| 34 nsPoint paintCenter(rect.x + rect.width / 2, | |
| 35 rect.y + rect.height / 2); | |
| 36 | |
| 37 nsPoint paintPolygon[checkNumPoints]; | |
| 38 // Convert checkmark for screen rendering | |
| 39 for (int32_t polyIndex = 0; polyIndex < checkNumPoints; polyIndex++) { | |
| 40 paintPolygon[polyIndex] = paintCenter + | |
| 41 nsPoint(checkPolygonX[polyIndex] * paintScale, | |
| 42 checkPolygonY[polyIndex] * paintScale); | |
| 43 } | |
| 44 | |
| 45 aCtx->SetColor(aFrame->StyleColor()->mColor); | |
| 46 aCtx->FillPolygon(paintPolygon, checkNumPoints); | |
| 47 } | |
| 48 | |
| 49 static void | |
| 50 PaintIndeterminateMark(nsIFrame* aFrame, | |
| 51 nsRenderingContext* aCtx, | |
| 52 const nsRect& aDirtyRect, | |
| 53 nsPoint aPt) | |
| 54 { | |
| 55 nsRect rect(aPt, aFrame->GetSize()); | |
| 56 rect.Deflate(aFrame->GetUsedBorderAndPadding()); | |
| 57 | |
| 58 rect.y += (rect.height - rect.height/4) / 2; | |
| 59 rect.height /= 4; | |
| 60 | |
| 61 aCtx->SetColor(aFrame->StyleColor()->mColor); | |
| 62 aCtx->FillRect(rect); | |
| 63 } | |
| 64 | |
| 65 //------------------------------------------------------------ | |
| 66 nsIFrame* | |
| 67 NS_NewGfxCheckboxControlFrame(nsIPresShell* aPresShell, | |
| 68 nsStyleContext* aContext) | |
| 69 { | |
| 70 return new (aPresShell) nsGfxCheckboxControlFrame(aContext); | |
| 71 } | |
| 72 | |
| 73 NS_IMPL_FRAMEARENA_HELPERS(nsGfxCheckboxControlFrame) | |
| 74 | |
| 75 | |
| 76 //------------------------------------------------------------ | |
| 77 // Initialize GFX-rendered state | |
| 78 nsGfxCheckboxControlFrame::nsGfxCheckboxControlFrame(nsStyleContext* aContext) | |
| 79 : nsFormControlFrame(aContext) | |
| 80 { | |
| 81 } | |
| 82 | |
| 83 nsGfxCheckboxControlFrame::~nsGfxCheckboxControlFrame() | |
| 84 { | |
| 85 } | |
| 86 | |
| 87 #ifdef ACCESSIBILITY | |
| 88 a11y::AccType | |
| 89 nsGfxCheckboxControlFrame::AccessibleType() | |
| 90 { | |
| 91 return a11y::eHTMLCheckboxType; | |
| 92 } | |
| 93 #endif | |
| 94 | |
| 95 //------------------------------------------------------------ | |
| 96 void | |
| 97 nsGfxCheckboxControlFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder, | |
| 98 const nsRect& aDirtyRect, | |
| 99 const nsDisplayListSet& aLists) | |
| 100 { | |
| 101 nsFormControlFrame::BuildDisplayList(aBuilder, aDirtyRect, aLists); | |
| 102 | |
| 103 // Get current checked state through content model. | |
| 104 if ((!IsChecked() && !IsIndeterminate()) || !IsVisibleForPainting(aBuilder)) | |
| 105 return; // we're not checked or not visible, nothing to paint. | |
| 106 | |
| 107 if (IsThemed()) | |
| 108 return; // No need to paint the checkmark. The theme will do it. | |
| 109 | |
| 110 aLists.Content()->AppendNewToTop(new (aBuilder) | |
| 111 nsDisplayGeneric(aBuilder, this, | |
| 112 IsIndeterminate() | |
| 113 ? PaintIndeterminateMark : PaintCheckMark, | |
| 114 "CheckedCheckbox", | |
| 115 nsDisplayItem::TYPE_CHECKED_CHECKBOX)); | |
| 116 } | |
| 117 | |
| 118 //------------------------------------------------------------ | |
| 119 bool | |
| 120 nsGfxCheckboxControlFrame::IsChecked() | |
| 121 { | |
| 122 nsCOMPtr<nsIDOMHTMLInputElement> elem(do_QueryInterface(mContent)); | |
| 123 bool retval = false; | |
| 124 elem->GetChecked(&retval); | |
| 125 return retval; | |
| 126 } | |
| 127 | |
| 128 bool | |
| 129 nsGfxCheckboxControlFrame::IsIndeterminate() | |
| 130 { | |
| 131 nsCOMPtr<nsIDOMHTMLInputElement> elem(do_QueryInterface(mContent)); | |
| 132 bool retval = false; | |
| 133 elem->GetIndeterminate(&retval); | |
| 134 return retval; | |
| 135 } |
