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layout/xul/tree/nsTreeUtils.cpp@97036ab72558 (annotated)

layout/xul/tree/nsTreeUtils.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 "nsReadableUtils.h"
michael@0	7	#include "nsTreeUtils.h"
michael@0	8	#include "ChildIterator.h"
michael@0	9	#include "nsCRT.h"
michael@0	10	#include "nsIAtom.h"
michael@0	11	#include "nsNameSpaceManager.h"
michael@0	12	#include "nsGkAtoms.h"
michael@0	13	#include "nsINodeInfo.h"
michael@0	14
michael@0	15	using namespace mozilla;
michael@0	16
michael@0	17	nsresult
michael@0	18	nsTreeUtils::TokenizeProperties(const nsAString& aProperties, AtomArray & aPropertiesArray)
michael@0	19	{
michael@0	20	nsAString::const_iterator end;
michael@0	21	aProperties.EndReading(end);
michael@0	22
michael@0	23	nsAString::const_iterator iter;
michael@0	24	aProperties.BeginReading(iter);
michael@0	25
michael@0	26	do {
michael@0	27	// Skip whitespace
michael@0	28	while (iter != end && nsCRT::IsAsciiSpace(*iter))
michael@0	29	++iter;
michael@0	30
michael@0	31	// If only whitespace, we're done
michael@0	32	if (iter == end)
michael@0	33	break;
michael@0	34
michael@0	35	// Note the first non-whitespace character
michael@0	36	nsAString::const_iterator first = iter;
michael@0	37
michael@0	38	// Advance to the next whitespace character
michael@0	39	while (iter != end && ! nsCRT::IsAsciiSpace(*iter))
michael@0	40	++iter;
michael@0	41
michael@0	42	// XXX this would be nonsensical
michael@0	43	NS_ASSERTION(iter != first, "eh? something's wrong here");
michael@0	44	if (iter == first)
michael@0	45	break;
michael@0	46
michael@0	47	nsCOMPtr<nsIAtom> atom = do_GetAtom(Substring(first, iter));
michael@0	48	aPropertiesArray.AppendElement(atom);
michael@0	49	} while (iter != end);
michael@0	50
michael@0	51	return NS_OK;
michael@0	52	}
michael@0	53
michael@0	54	nsIContent*
michael@0	55	nsTreeUtils::GetImmediateChild(nsIContent* aContainer, nsIAtom* aTag)
michael@0	56	{
michael@0	57	dom::FlattenedChildIterator iter(aContainer);
michael@0	58	for (nsIContent* child = iter.GetNextChild(); child; child = iter.GetNextChild()) {
michael@0	59	if (child->Tag() == aTag) {
michael@0	60	return child;
michael@0	61	}
michael@0	62	}
michael@0	63
michael@0	64	return nullptr;
michael@0	65	}
michael@0	66
michael@0	67	nsIContent*
michael@0	68	nsTreeUtils::GetDescendantChild(nsIContent* aContainer, nsIAtom* aTag)
michael@0	69	{
michael@0	70	dom::FlattenedChildIterator iter(aContainer);
michael@0	71	for (nsIContent* child = iter.GetNextChild(); child; child = iter.GetNextChild()) {
michael@0	72	if (child->Tag() == aTag) {
michael@0	73	return child;
michael@0	74	}
michael@0	75
michael@0	76	child = GetDescendantChild(child, aTag);
michael@0	77	if (child) {
michael@0	78	return child;
michael@0	79	}
michael@0	80	}
michael@0	81
michael@0	82	return nullptr;
michael@0	83	}
michael@0	84
michael@0	85	nsresult
michael@0	86	nsTreeUtils::UpdateSortIndicators(nsIContent* aColumn, const nsAString& aDirection)
michael@0	87	{
michael@0	88	aColumn->SetAttr(kNameSpaceID_None, nsGkAtoms::sortDirection, aDirection, true);
michael@0	89	aColumn->SetAttr(kNameSpaceID_None, nsGkAtoms::sortActive, NS_LITERAL_STRING("true"), true);
michael@0	90
michael@0	91	// Unset sort attribute(s) on the other columns
michael@0	92	nsCOMPtr<nsIContent> parentContent = aColumn->GetParent();
michael@0	93	if (parentContent &&
michael@0	94	parentContent->NodeInfo()->Equals(nsGkAtoms::treecols,
michael@0	95	kNameSpaceID_XUL)) {
michael@0	96	uint32_t i, numChildren = parentContent->GetChildCount();
michael@0	97	for (i = 0; i < numChildren; ++i) {
michael@0	98	nsCOMPtr<nsIContent> childContent = parentContent->GetChildAt(i);
michael@0	99
michael@0	100	if (childContent &&
michael@0	101	childContent != aColumn &&
michael@0	102	childContent->NodeInfo()->Equals(nsGkAtoms::treecol,
michael@0	103	kNameSpaceID_XUL)) {
michael@0	104	childContent->UnsetAttr(kNameSpaceID_None,
michael@0	105	nsGkAtoms::sortDirection, true);
michael@0	106	childContent->UnsetAttr(kNameSpaceID_None,
michael@0	107	nsGkAtoms::sortActive, true);
michael@0	108	}
michael@0	109	}
michael@0	110	}
michael@0	111
michael@0	112	return NS_OK;
michael@0	113	}
michael@0	114
michael@0	115	nsresult
michael@0	116	nsTreeUtils::GetColumnIndex(nsIContent* aColumn, int32_t* aResult)
michael@0	117	{
michael@0	118	nsIContent* parentContent = aColumn->GetParent();
michael@0	119	if (parentContent &&
michael@0	120	parentContent->NodeInfo()->Equals(nsGkAtoms::treecols,
michael@0	121	kNameSpaceID_XUL)) {
michael@0	122	uint32_t i, numChildren = parentContent->GetChildCount();
michael@0	123	int32_t colIndex = 0;
michael@0	124	for (i = 0; i < numChildren; ++i) {
michael@0	125	nsIContent *childContent = parentContent->GetChildAt(i);
michael@0	126	if (childContent &&
michael@0	127	childContent->NodeInfo()->Equals(nsGkAtoms::treecol,
michael@0	128	kNameSpaceID_XUL)) {
michael@0	129	if (childContent == aColumn) {
michael@0	130	*aResult = colIndex;
michael@0	131	return NS_OK;
michael@0	132	}
michael@0	133	++colIndex;
michael@0	134	}
michael@0	135	}
michael@0	136	}
michael@0	137
michael@0	138	*aResult = -1;
michael@0	139	return NS_OK;
michael@0	140	}