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
8 #include "gfxUtils.h"
9 #include "mozilla/gfx/2D.h"
10 #include "nsIContent.h"
11 #include "nsCOMPtr.h"
12 #include "nsLayoutUtils.h"
13 #include "nsRenderingContext.h"
14 #include "nsIDOMHTMLInputElement.h"
15 #include "nsDisplayList.h"
16 #include <algorithm>
17
18 using namespace mozilla;
19 using namespace mozilla::gfx;
20
21 static void
PaintCheckMark(nsIFrame * aFrame,DrawTarget * aDrawTarget,const nsRect & aDirtyRect,nsPoint aPt)22 PaintCheckMark(nsIFrame* aFrame,
23 DrawTarget* aDrawTarget,
24 const nsRect& aDirtyRect,
25 nsPoint aPt)
26 {
27 nsRect rect(aPt, aFrame->GetSize());
28 rect.Deflate(aFrame->GetUsedBorderAndPadding());
29
30 // Points come from the coordinates on a 7X7 unit box centered at 0,0
31 const int32_t checkPolygonX[] = { -3, -1, 3, 3, -1, -3 };
32 const int32_t checkPolygonY[] = { -1, 1, -3, -1, 3, 1 };
33 const int32_t checkNumPoints = sizeof(checkPolygonX) / sizeof(int32_t);
34 const int32_t checkSize = 9; // 2 units of padding on either side
35 // of the 7x7 unit checkmark
36
37 // Scale the checkmark based on the smallest dimension
38 nscoord paintScale = std::min(rect.width, rect.height) / checkSize;
39 nsPoint paintCenter(rect.x + rect.width / 2,
40 rect.y + rect.height / 2);
41
42 RefPtr<PathBuilder> builder = aDrawTarget->CreatePathBuilder();
43 nsPoint p = paintCenter + nsPoint(checkPolygonX[0] * paintScale,
44 checkPolygonY[0] * paintScale);
45
46 int32_t appUnitsPerDevPixel = aFrame->PresContext()->AppUnitsPerDevPixel();
47 builder->MoveTo(NSPointToPoint(p, appUnitsPerDevPixel));
48 for (int32_t polyIndex = 1; polyIndex < checkNumPoints; polyIndex++) {
49 p = paintCenter + nsPoint(checkPolygonX[polyIndex] * paintScale,
50 checkPolygonY[polyIndex] * paintScale);
51 builder->LineTo(NSPointToPoint(p, appUnitsPerDevPixel));
52 }
53 RefPtr<Path> path = builder->Finish();
54 aDrawTarget->Fill(path,
55 ColorPattern(ToDeviceColor(aFrame->StyleColor()->mColor)));
56 }
57
58 static void
PaintIndeterminateMark(nsIFrame * aFrame,DrawTarget * aDrawTarget,const nsRect & aDirtyRect,nsPoint aPt)59 PaintIndeterminateMark(nsIFrame* aFrame,
60 DrawTarget* aDrawTarget,
61 const nsRect& aDirtyRect,
62 nsPoint aPt)
63 {
64 int32_t appUnitsPerDevPixel = aFrame->PresContext()->AppUnitsPerDevPixel();
65
66 nsRect rect(aPt, aFrame->GetSize());
67 rect.Deflate(aFrame->GetUsedBorderAndPadding());
68 rect.y += (rect.height - rect.height/4) / 2;
69 rect.height /= 4;
70
71 Rect devPxRect = NSRectToSnappedRect(rect, appUnitsPerDevPixel, *aDrawTarget);
72
73 aDrawTarget->FillRect(
74 devPxRect, ColorPattern(ToDeviceColor(aFrame->StyleColor()->mColor)));
75 }
76
77 //------------------------------------------------------------
78 nsIFrame*
NS_NewGfxCheckboxControlFrame(nsIPresShell * aPresShell,nsStyleContext * aContext)79 NS_NewGfxCheckboxControlFrame(nsIPresShell* aPresShell,
80 nsStyleContext* aContext)
81 {
82 return new (aPresShell) nsGfxCheckboxControlFrame(aContext);
83 }
84
NS_IMPL_FRAMEARENA_HELPERS(nsGfxCheckboxControlFrame)85 NS_IMPL_FRAMEARENA_HELPERS(nsGfxCheckboxControlFrame)
86
87
88 //------------------------------------------------------------
89 // Initialize GFX-rendered state
90 nsGfxCheckboxControlFrame::nsGfxCheckboxControlFrame(nsStyleContext* aContext)
91 : nsFormControlFrame(aContext)
92 {
93 }
94
~nsGfxCheckboxControlFrame()95 nsGfxCheckboxControlFrame::~nsGfxCheckboxControlFrame()
96 {
97 }
98
99 #ifdef ACCESSIBILITY
100 a11y::AccType
AccessibleType()101 nsGfxCheckboxControlFrame::AccessibleType()
102 {
103 return a11y::eHTMLCheckboxType;
104 }
105 #endif
106
107 //------------------------------------------------------------
108 void
BuildDisplayList(nsDisplayListBuilder * aBuilder,const nsRect & aDirtyRect,const nsDisplayListSet & aLists)109 nsGfxCheckboxControlFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
110 const nsRect& aDirtyRect,
111 const nsDisplayListSet& aLists)
112 {
113 nsFormControlFrame::BuildDisplayList(aBuilder, aDirtyRect, aLists);
114
115 // Get current checked state through content model.
116 if ((!IsChecked() && !IsIndeterminate()) || !IsVisibleForPainting(aBuilder))
117 return; // we're not checked or not visible, nothing to paint.
118
119 if (IsThemed())
120 return; // No need to paint the checkmark. The theme will do it.
121
122 aLists.Content()->AppendNewToTop(new (aBuilder)
123 nsDisplayGeneric(aBuilder, this,
124 IsIndeterminate()
125 ? PaintIndeterminateMark : PaintCheckMark,
126 "CheckedCheckbox",
127 nsDisplayItem::TYPE_CHECKED_CHECKBOX));
128 }
129
130 //------------------------------------------------------------
131 bool
IsChecked()132 nsGfxCheckboxControlFrame::IsChecked()
133 {
134 nsCOMPtr<nsIDOMHTMLInputElement> elem(do_QueryInterface(mContent));
135 bool retval = false;
136 elem->GetChecked(&retval);
137 return retval;
138 }
139
140 bool
IsIndeterminate()141 nsGfxCheckboxControlFrame::IsIndeterminate()
142 {
143 nsCOMPtr<nsIDOMHTMLInputElement> elem(do_QueryInterface(mContent));
144 bool retval = false;
145 elem->GetIndeterminate(&retval);
146 return retval;
147 }
148