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gecko-dev
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gecko-dev/xpcom/components/ManifestParser.cpp

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18 KiB
C++
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/ArrayUtils.h"
#include "ManifestParser.h"
#include <string.h>
#include "prio.h"
#include "prprf.h"
#if defined(XP_WIN)
#include <windows.h>
#elif defined(MOZ_WIDGET_COCOA)
#include <CoreServices/CoreServices.h>
#include "nsCocoaFeatures.h"
#elif defined(MOZ_WIDGET_GTK)
#include <gtk/gtk.h>
#endif
#ifdef MOZ_WIDGET_ANDROID
#include "AndroidBridge.h"
#endif
#include "mozilla/Services.h"
#include "nsCRT.h"
#include "nsConsoleMessage.h"
#include "nsTextFormatter.h"
#include "nsVersionComparator.h"
#include "nsXPCOMCIDInternal.h"
#include "nsIConsoleService.h"
#include "nsIScriptError.h"
#include "nsIXULAppInfo.h"
#include "nsIXULRuntime.h"
using namespace mozilla;
struct ManifestDirective
{
const char* directive;
int argc;
// Some directives should only be delivered for NS_COMPONENT_LOCATION
// manifests.
bool componentonly;
bool ischrome;
bool allowbootstrap;
// The platform/contentaccessible flags only apply to content directives.
bool contentflags;
// Function to handle this directive. This isn't a union because C++ still
// hasn't learned how to initialize unions in a sane way.
void (nsComponentManagerImpl::*mgrfunc)
(nsComponentManagerImpl::ManifestProcessingContext& cx,
int lineno, char *const * argv);
void (nsChromeRegistry::*regfunc)
(nsChromeRegistry::ManifestProcessingContext& cx,
int lineno, char *const *argv,
bool platform, bool contentaccessible);
bool isContract;
};
static const ManifestDirective kParsingTable[] = {
{ "manifest", 1, false, true, true, false,
&nsComponentManagerImpl::ManifestManifest, nullptr },
{ "binary-component", 1, true, false, false, false,
&nsComponentManagerImpl::ManifestBinaryComponent, nullptr },
{ "interfaces", 1, true, false, false, false,
&nsComponentManagerImpl::ManifestXPT, nullptr },
{ "component", 2, true, false, false, false,
&nsComponentManagerImpl::ManifestComponent, nullptr },
{ "contract", 2, true, false, false, false,
&nsComponentManagerImpl::ManifestContract, nullptr, true},
{ "category", 3, true, false, false, false,
&nsComponentManagerImpl::ManifestCategory, nullptr },
{ "content", 2, true, true, true, true,
nullptr, &nsChromeRegistry::ManifestContent },
{ "locale", 3, true, true, true, false,
nullptr, &nsChromeRegistry::ManifestLocale },
{ "skin", 3, false, true, true, false,
nullptr, &nsChromeRegistry::ManifestSkin },
{ "overlay", 2, true, true, false, false,
nullptr, &nsChromeRegistry::ManifestOverlay },
{ "style", 2, false, true, false, false,
nullptr, &nsChromeRegistry::ManifestStyle },
{ "override", 2, true, true, true, false,
nullptr, &nsChromeRegistry::ManifestOverride },
{ "resource", 2, true, true, false, false,
nullptr, &nsChromeRegistry::ManifestResource }
};
static const char kWhitespace[] = "\t ";
static bool IsNewline(char c)
{
return c == '\n' || c == '\r';
}
namespace {
struct AutoPR_smprintf_free
{
AutoPR_smprintf_free(char* buf)
: mBuf(buf)
{
}
~AutoPR_smprintf_free()
{
if (mBuf)
PR_smprintf_free(mBuf);
}
operator char*() const {
return mBuf;
}
char* mBuf;
};
} // anonymous namespace
void LogMessage(const char* aMsg, ...)
{
nsCOMPtr<nsIConsoleService> console =
do_GetService(NS_CONSOLESERVICE_CONTRACTID);
if (!console)
return;
va_list args;
va_start(args, aMsg);
AutoPR_smprintf_free formatted(PR_vsmprintf(aMsg, args));
va_end(args);
nsCOMPtr<nsIConsoleMessage> error =
new nsConsoleMessage(NS_ConvertUTF8toUTF16(formatted).get());
console->LogMessage(error);
}
void LogMessageWithContext(FileLocation &aFile,
uint32_t aLineNumber, const char* aMsg, ...)
{
va_list args;
va_start(args, aMsg);
AutoPR_smprintf_free formatted(PR_vsmprintf(aMsg, args));
va_end(args);
if (!formatted)
return;
nsCString file;
aFile.GetURIString(file);
nsCOMPtr<nsIScriptError> error =
do_CreateInstance(NS_SCRIPTERROR_CONTRACTID);
if (!error) {
// This can happen early in component registration. Fall back to a
// generic console message.
LogMessage("Warning: in '%s', line %i: %s", file.get(),
aLineNumber, (char*) formatted);
return;
}
nsCOMPtr<nsIConsoleService> console =
do_GetService(NS_CONSOLESERVICE_CONTRACTID);
if (!console)
return;
nsresult rv = error->Init(NS_ConvertUTF8toUTF16(formatted),
NS_ConvertUTF8toUTF16(file), EmptyString(),
aLineNumber, 0, nsIScriptError::warningFlag,
"chrome registration");
if (NS_FAILED(rv))
return;
console->LogMessage(error);
}
/**
* Check for a modifier flag of the following forms:
* "flag" (same as "true")
* "flag=yes|true|1"
* "flag="no|false|0"
* @param aFlag The flag to compare.
* @param aData The tokenized data to check; this is lowercased
* before being passed in.
* @param aResult If the flag is found, the value is assigned here.
* @return Whether the flag was handled.
*/
static bool
CheckFlag(const nsSubstring& aFlag, const nsSubstring& aData, bool& aResult)
{
if (!StringBeginsWith(aData, aFlag))
return false;
if (aFlag.Length() == aData.Length()) {
// the data is simply "flag", which is the same as "flag=yes"
aResult = true;
return true;
}
if (aData.CharAt(aFlag.Length()) != '=') {
// the data is "flag2=", which is not anything we care about
return false;
}
if (aData.Length() == aFlag.Length() + 1) {
aResult = false;
return true;
}
switch (aData.CharAt(aFlag.Length() + 1)) {
case '1':
case 't': //true
case 'y': //yes
aResult = true;
return true;
case '0':
case 'f': //false
case 'n': //no
aResult = false;
return true;
}
return false;
}
enum TriState {
eUnspecified,
eBad,
eOK
};
/**
* Check for a modifier flag of the following form:
* "flag=string"
* "flag!=string"
* @param aFlag The flag to compare.
* @param aData The tokenized data to check; this is lowercased
* before being passed in.
* @param aValue The value that is expected.
* @param aResult If this is "ok" when passed in, this is left alone.
* Otherwise if the flag is found it is set to eBad or eOK.
* @return Whether the flag was handled.
*/
static bool
CheckStringFlag(const nsSubstring& aFlag, const nsSubstring& aData,
const nsSubstring& aValue, TriState& aResult)
{
if (aData.Length() < aFlag.Length() + 1)
return false;
if (!StringBeginsWith(aData, aFlag))
return false;
bool comparison = true;
if (aData[aFlag.Length()] != '=') {
if (aData[aFlag.Length()] == '!' &&
aData.Length() >= aFlag.Length() + 2 &&
aData[aFlag.Length() + 1] == '=')
comparison = false;
else
return false;
}
if (aResult != eOK) {
nsDependentSubstring testdata = Substring(aData, aFlag.Length() + (comparison ? 1 : 2));
if (testdata.Equals(aValue))
aResult = comparison ? eOK : eBad;
else
aResult = comparison ? eBad : eOK;
}
return true;
}
/**
* Check for a modifier flag of the following form:
* "flag=version"
* "flag<=version"
* "flag<version"
* "flag>=version"
* "flag>version"
* @param aFlag The flag to compare.
* @param aData The tokenized data to check; this is lowercased
* before being passed in.
* @param aValue The value that is expected. If this is empty then no
* comparison will match.
* @param aResult If this is eOK when passed in, this is left alone.
* Otherwise if the flag is found it is set to eBad or eOK.
* @return Whether the flag was handled.
*/
#define COMPARE_EQ 1 << 0
#define COMPARE_LT 1 << 1
#define COMPARE_GT 1 << 2
static bool
CheckVersionFlag(const nsString& aFlag, const nsString& aData,
const nsString& aValue, TriState& aResult)
{
if (aData.Length() < aFlag.Length() + 2)
return false;
if (!StringBeginsWith(aData, aFlag))
return false;
if (aValue.Length() == 0) {
if (aResult != eOK)
aResult = eBad;
return true;
}
uint32_t comparison;
nsAutoString testdata;
switch (aData[aFlag.Length()]) {
case '=':
comparison = COMPARE_EQ;
testdata = Substring(aData, aFlag.Length() + 1);
break;
case '<':
if (aData[aFlag.Length() + 1] == '=') {
comparison = COMPARE_EQ | COMPARE_LT;
testdata = Substring(aData, aFlag.Length() + 2);
}
else {
comparison = COMPARE_LT;
testdata = Substring(aData, aFlag.Length() + 1);
}
break;
case '>':
if (aData[aFlag.Length() + 1] == '=') {
comparison = COMPARE_EQ | COMPARE_GT;
testdata = Substring(aData, aFlag.Length() + 2);
}
else {
comparison = COMPARE_GT;
testdata = Substring(aData, aFlag.Length() + 1);
}
break;
default:
return false;
}
if (testdata.Length() == 0)
return false;
if (aResult != eOK) {
int32_t c = mozilla::CompareVersions(NS_ConvertUTF16toUTF8(aValue).get(),
NS_ConvertUTF16toUTF8(testdata).get());
if ((c == 0 && comparison & COMPARE_EQ) ||
(c < 0 && comparison & COMPARE_LT) ||
(c > 0 && comparison & COMPARE_GT))
aResult = eOK;
else
aResult = eBad;
}
return true;
}
// In-place conversion of ascii characters to lower case
static void
ToLowerCase(char* token)
{
for (; *token; ++token)
*token = NS_ToLower(*token);
}
namespace {
struct CachedDirective
{
int lineno;
char* argv[4];
};
} // anonymous namespace
void
ParseManifest(NSLocationType type, FileLocation &file, char* buf, bool aChromeOnly)
{
nsComponentManagerImpl::ManifestProcessingContext mgrcx(type, file, aChromeOnly);
nsChromeRegistry::ManifestProcessingContext chromecx(type, file);
nsresult rv;
NS_NAMED_LITERAL_STRING(kPlatform, "platform");
NS_NAMED_LITERAL_STRING(kContentAccessible, "contentaccessible");
NS_NAMED_LITERAL_STRING(kApplication, "application");
NS_NAMED_LITERAL_STRING(kAppVersion, "appversion");
NS_NAMED_LITERAL_STRING(kGeckoVersion, "platformversion");
NS_NAMED_LITERAL_STRING(kOs, "os");
NS_NAMED_LITERAL_STRING(kOsVersion, "osversion");
NS_NAMED_LITERAL_STRING(kABI, "abi");
#if defined(MOZ_WIDGET_ANDROID)
NS_NAMED_LITERAL_STRING(kTablet, "tablet");
#endif
// Obsolete
NS_NAMED_LITERAL_STRING(kXPCNativeWrappers, "xpcnativewrappers");
nsAutoString appID;
nsAutoString appVersion;
nsAutoString geckoVersion;
nsAutoString osTarget;
nsAutoString abi;
nsCOMPtr<nsIXULAppInfo> xapp (do_GetService(XULAPPINFO_SERVICE_CONTRACTID));
if (xapp) {
nsAutoCString s;
rv = xapp->GetID(s);
if (NS_SUCCEEDED(rv))
CopyUTF8toUTF16(s, appID);
rv = xapp->GetVersion(s);
if (NS_SUCCEEDED(rv))
CopyUTF8toUTF16(s, appVersion);
rv = xapp->GetPlatformVersion(s);
if (NS_SUCCEEDED(rv))
CopyUTF8toUTF16(s, geckoVersion);
nsCOMPtr<nsIXULRuntime> xruntime (do_QueryInterface(xapp));
if (xruntime) {
rv = xruntime->GetOS(s);
if (NS_SUCCEEDED(rv)) {
ToLowerCase(s);
CopyUTF8toUTF16(s, osTarget);
}
rv = xruntime->GetXPCOMABI(s);
if (NS_SUCCEEDED(rv) && osTarget.Length()) {
ToLowerCase(s);
CopyUTF8toUTF16(s, abi);
abi.Insert(char16_t('_'), 0);
abi.Insert(osTarget, 0);
}
}
}
nsAutoString osVersion;
#if defined(XP_WIN)
#pragma warning(push)
#pragma warning(disable:4996) // VC12+ deprecates GetVersionEx
OSVERSIONINFO info = { sizeof(OSVERSIONINFO) };
if (GetVersionEx(&info)) {
nsTextFormatter::ssprintf(osVersion, MOZ_UTF16("%ld.%ld"),
info.dwMajorVersion,
info.dwMinorVersion);
}
#pragma warning(pop)
#elif defined(MOZ_WIDGET_COCOA)
SInt32 majorVersion = nsCocoaFeatures::OSXVersionMajor();
SInt32 minorVersion = nsCocoaFeatures::OSXVersionMinor();
nsTextFormatter::ssprintf(osVersion, NS_LITERAL_STRING("%ld.%ld").get(),
majorVersion,
minorVersion);
#elif defined(MOZ_WIDGET_GTK)
nsTextFormatter::ssprintf(osVersion, MOZ_UTF16("%ld.%ld"),
gtk_major_version,
gtk_minor_version);
#elif defined(MOZ_WIDGET_ANDROID)
bool isTablet = false;
if (mozilla::AndroidBridge::Bridge()) {
mozilla::AndroidBridge::Bridge()->GetStaticStringField("android/os/Build$VERSION", "RELEASE", osVersion);
isTablet = mozilla::widget::android::GeckoAppShell::IsTablet();
}
#endif
// Because contracts must be registered after CIDs, we save and process them
// at the end.
nsTArray<CachedDirective> contracts;
char *token;
char *newline = buf;
uint32_t line = 0;
// outer loop tokenizes by newline
while (*newline) {
while (*newline && IsNewline(*newline)) {
++newline;
++line;
}
if (!*newline)
break;
token = newline;
while (*newline && !IsNewline(*newline))
++newline;
if (*newline) {
*newline = '\0';
++newline;
}
++line;
if (*token == '#') // ignore lines that begin with # as comments
continue;
char *whitespace = token;
token = nsCRT::strtok(whitespace, kWhitespace, &whitespace);
if (!token) continue;
const ManifestDirective* directive = nullptr;
for (const ManifestDirective* d = kParsingTable;
d < ArrayEnd(kParsingTable);
++d) {
if (!strcmp(d->directive, token)) {
directive = d;
break;
}
}
if (!directive) {
LogMessageWithContext(file, line,
"Ignoring unrecognized chrome manifest directive '%s'.",
token);
continue;
}
if (!directive->allowbootstrap && NS_BOOTSTRAPPED_LOCATION == type) {
LogMessageWithContext(file, line,
"Bootstrapped manifest not allowed to use '%s' directive.",
token);
continue;
}
if (directive->componentonly && NS_SKIN_LOCATION == type) {
LogMessageWithContext(file, line,
"Skin manifest not allowed to use '%s' directive.",
token);
continue;
}
NS_ASSERTION(directive->argc < 4, "Need to reset argv array length");
char* argv[4];
for (int i = 0; i < directive->argc; ++i)
argv[i] = nsCRT::strtok(whitespace, kWhitespace, &whitespace);
if (!argv[directive->argc - 1]) {
LogMessageWithContext(file, line,
"Not enough arguments for chrome manifest directive '%s', expected %i.",
token, directive->argc);
continue;
}
bool ok = true;
TriState stAppVersion = eUnspecified;
TriState stGeckoVersion = eUnspecified;
TriState stApp = eUnspecified;
TriState stOsVersion = eUnspecified;
TriState stOs = eUnspecified;
TriState stABI = eUnspecified;
#if defined(MOZ_WIDGET_ANDROID)
TriState stTablet = eUnspecified;
#endif
bool platform = false;
bool contentAccessible = false;
while (nullptr != (token = nsCRT::strtok(whitespace, kWhitespace, &whitespace)) && ok) {
ToLowerCase(token);
NS_ConvertASCIItoUTF16 wtoken(token);
if (CheckStringFlag(kApplication, wtoken, appID, stApp) ||
CheckStringFlag(kOs, wtoken, osTarget, stOs) ||
CheckStringFlag(kABI, wtoken, abi, stABI) ||
CheckVersionFlag(kOsVersion, wtoken, osVersion, stOsVersion) ||
CheckVersionFlag(kAppVersion, wtoken, appVersion, stAppVersion) ||
CheckVersionFlag(kGeckoVersion, wtoken, geckoVersion, stGeckoVersion))
continue;
#if defined(MOZ_WIDGET_ANDROID)
bool tablet = false;
if (CheckFlag(kTablet, wtoken, tablet)) {
stTablet = (tablet == isTablet) ? eOK : eBad;
continue;
}
#endif
if (directive->contentflags &&
(CheckFlag(kPlatform, wtoken, platform) ||
CheckFlag(kContentAccessible, wtoken, contentAccessible)))
continue;
bool xpcNativeWrappers = true; // Dummy for CheckFlag.
if (CheckFlag(kXPCNativeWrappers, wtoken, xpcNativeWrappers)) {
LogMessageWithContext(file, line,
"Ignoring obsolete chrome registration modifier '%s'.",
token);
continue;
}
LogMessageWithContext(file, line,
"Unrecognized chrome manifest modifier '%s'.",
token);
ok = false;
}
if (!ok ||
stApp == eBad ||
stAppVersion == eBad ||
stGeckoVersion == eBad ||
stOs == eBad ||
stOsVersion == eBad ||
#ifdef MOZ_WIDGET_ANDROID
stTablet == eBad ||
#endif
stABI == eBad)
continue;
if (directive->regfunc) {
if (GeckoProcessType_Default != XRE_GetProcessType())
continue;
if (!nsChromeRegistry::gChromeRegistry) {
nsCOMPtr<nsIChromeRegistry> cr =
mozilla::services::GetChromeRegistryService();
if (!nsChromeRegistry::gChromeRegistry) {
LogMessageWithContext(file, line,
"Chrome registry isn't available yet.");
continue;
}
}
(nsChromeRegistry::gChromeRegistry->*(directive->regfunc))
(chromecx, line, argv, platform, contentAccessible);
}
else if (directive->ischrome || !aChromeOnly) {
if (directive->isContract) {
CachedDirective* cd = contracts.AppendElement();
cd->lineno = line;
cd->argv[0] = argv[0];
cd->argv[1] = argv[1];
}
else
(nsComponentManagerImpl::gComponentManager->*(directive->mgrfunc))
(mgrcx, line, argv);
}
}
for (uint32_t i = 0; i < contracts.Length(); ++i) {
CachedDirective& d = contracts[i];
nsComponentManagerImpl::gComponentManager->ManifestContract
(mgrcx, d.lineno, d.argv);
}
}
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