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layout/forms/nsGfxCheckboxControlFrame.cpp@97036ab72558 (annotated)

layout/forms/nsGfxCheckboxControlFrame.cpp

Tue, 06 Jan 2015 21:39:09 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Tue, 06 Jan 2015 21:39:09 +0100

branch

TOR_BUG_9701

changeset 8

97036ab72558

permissions

-rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

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