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gfx/src/nsThebesFontEnumerator.cpp@97036ab72558 (annotated)

gfx/src/nsThebesFontEnumerator.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: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 "nsThebesFontEnumerator.h"
michael@0	7	#include <stdint.h> // for uint32_t
michael@0	8	#include "gfxPlatform.h" // for gfxPlatform
michael@0	9	#include "mozilla/Assertions.h" // for MOZ_ASSERT_HELPER2
michael@0	10	#include "nsCOMPtr.h" // for nsCOMPtr
michael@0	11	#include "nsDebug.h" // for NS_ENSURE_ARG_POINTER
michael@0	12	#include "nsError.h" // for NS_OK, NS_FAILED, nsresult
michael@0	13	#include "nsIAtom.h" // for nsIAtom, do_GetAtom
michael@0	14	#include "nsID.h"
michael@0	15	#include "nsMemory.h" // for nsMemory
michael@0	16	#include "nsString.h" // for nsAutoCString, nsAutoString, etc
michael@0	17	#include "nsTArray.h" // for nsTArray, nsTArray_Impl, etc
michael@0	18	#include "nscore.h" // for char16_t, NS_IMETHODIMP
michael@0	19
michael@0	20	NS_IMPL_ISUPPORTS(nsThebesFontEnumerator, nsIFontEnumerator)
michael@0	21
michael@0	22	nsThebesFontEnumerator::nsThebesFontEnumerator()
michael@0	23	{
michael@0	24	}
michael@0	25
michael@0	26	NS_IMETHODIMP
michael@0	27	nsThebesFontEnumerator::EnumerateAllFonts(uint32_t *aCount,
michael@0	28	char16_t ***aResult)
michael@0	29	{
michael@0	30	return EnumerateFonts (nullptr, nullptr, aCount, aResult);
michael@0	31	}
michael@0	32
michael@0	33	NS_IMETHODIMP
michael@0	34	nsThebesFontEnumerator::EnumerateFonts(const char *aLangGroup,
michael@0	35	const char *aGeneric,
michael@0	36	uint32_t *aCount,
michael@0	37	char16_t ***aResult)
michael@0	38	{
michael@0	39	NS_ENSURE_ARG_POINTER(aCount);
michael@0	40	NS_ENSURE_ARG_POINTER(aResult);
michael@0	41
michael@0	42	nsTArray<nsString> fontList;
michael@0	43
michael@0	44	nsAutoCString generic;
michael@0	45	if (aGeneric)
michael@0	46	generic.Assign(aGeneric);
michael@0	47	else
michael@0	48	generic.SetIsVoid(true);
michael@0	49
michael@0	50	nsCOMPtr<nsIAtom> langGroupAtom;
michael@0	51	if (aLangGroup) {
michael@0	52	nsAutoCString lowered;
michael@0	53	lowered.Assign(aLangGroup);
michael@0	54	ToLowerCase(lowered);
michael@0	55	langGroupAtom = do_GetAtom(lowered);
michael@0	56	}
michael@0	57
michael@0	58	nsresult rv = gfxPlatform::GetPlatform()->GetFontList(langGroupAtom, generic, fontList);
michael@0	59
michael@0	60	if (NS_FAILED(rv)) {
michael@0	61	*aCount = 0;
michael@0	62	*aResult = nullptr;
michael@0	63	/* XXX in this case, do we want to return the CSS generics? */
michael@0	64	return NS_OK;
michael@0	65	}
michael@0	66
michael@0	67	char16_t **fs = static_cast<char16_t **>
michael@0	68	(nsMemory::Alloc(fontList.Length() * sizeof(char16_t*)));
michael@0	69	for (uint32_t i = 0; i < fontList.Length(); i++) {
michael@0	70	fs[i] = ToNewUnicode(fontList[i]);
michael@0	71	}
michael@0	72
michael@0	73	*aResult = fs;
michael@0	74	*aCount = fontList.Length();
michael@0	75
michael@0	76	return NS_OK;
michael@0	77	}
michael@0	78
michael@0	79	NS_IMETHODIMP
michael@0	80	nsThebesFontEnumerator::HaveFontFor(const char *aLangGroup,
michael@0	81	bool *aResult)
michael@0	82	{
michael@0	83	NS_ENSURE_ARG_POINTER(aResult);
michael@0	84
michael@0	85	*aResult = true;
michael@0	86	return NS_OK;
michael@0	87	}
michael@0	88
michael@0	89	NS_IMETHODIMP
michael@0	90	nsThebesFontEnumerator::GetDefaultFont(const char *aLangGroup,
michael@0	91	const char *aGeneric,
michael@0	92	char16_t **aResult)
michael@0	93	{
michael@0	94	NS_ENSURE_ARG_POINTER(aResult);
michael@0	95	*aResult = nullptr;
michael@0	96	return NS_OK;
michael@0	97	}
michael@0	98
michael@0	99	NS_IMETHODIMP
michael@0	100	nsThebesFontEnumerator::UpdateFontList(bool *_retval)
michael@0	101	{
michael@0	102	gfxPlatform::GetPlatform()->UpdateFontList();
michael@0	103	*_retval = false; // always return false for now
michael@0	104	return NS_OK;
michael@0	105	}
michael@0	106
michael@0	107	NS_IMETHODIMP
michael@0	108	nsThebesFontEnumerator::GetStandardFamilyName(const char16_t *aName,
michael@0	109	char16_t **aResult)
michael@0	110	{
michael@0	111	NS_ENSURE_ARG_POINTER(aResult);
michael@0	112	NS_ENSURE_ARG_POINTER(aName);
michael@0	113
michael@0	114	nsAutoString name(aName);
michael@0	115	if (name.IsEmpty()) {
michael@0	116	*aResult = nullptr;
michael@0	117	return NS_OK;
michael@0	118	}
michael@0	119
michael@0	120	nsAutoString family;
michael@0	121	nsresult rv = gfxPlatform::GetPlatform()->
michael@0	122	GetStandardFamilyName(nsDependentString(aName), family);
michael@0	123	if (NS_FAILED(rv) || family.IsEmpty()) {
michael@0	124	*aResult = nullptr;
michael@0	125	return NS_OK;
michael@0	126	}
michael@0	127	*aResult = ToNewUnicode(family);
michael@0	128	return NS_OK;
michael@0	129	}