зеркало из https://github.com/mozilla/pjs.git
898 строки
23 KiB
C++
898 строки
23 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the Mozilla SMIL module.
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*
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* The Initial Developer of the Original Code is Brian Birtles.
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* Portions created by the Initial Developer are Copyright (C) 2005
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Brian Birtles <birtles@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsSMILParserUtils.h"
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#include "nsISMILAttr.h"
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#include "nsSMILValue.h"
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#include "nsSMILTimeValue.h"
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#include "nsSMILTimeValueSpecParams.h"
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#include "nsSMILTypes.h"
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#include "nsSMILRepeatCount.h"
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#include "nsContentUtils.h"
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#include "nsString.h"
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#include "prdtoa.h"
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#include "nsCRT.h"
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#include "nsCOMPtr.h"
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#include "prlong.h"
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#include "nsCharSeparatedTokenizer.h"
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//------------------------------------------------------------------------------
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// Helper functions and Constants
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namespace {
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const PRUint32 MSEC_PER_SEC = 1000;
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const PRUint32 MSEC_PER_MIN = 1000 * 60;
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const PRUint32 MSEC_PER_HOUR = 1000 * 60 * 60;
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const PRInt32 DECIMAL_BASE = 10;
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#define ACCESSKEY_PREFIX_LC NS_LITERAL_STRING("accesskey(") // SMIL2+
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#define ACCESSKEY_PREFIX_CC NS_LITERAL_STRING("accessKey(") // SVG/SMIL ANIM
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#define REPEAT_PREFIX NS_LITERAL_STRING("repeat(")
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#define WALLCLOCK_PREFIX NS_LITERAL_STRING("wallclock(")
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// NS_IS_SPACE relies on isspace which may return true for \xB and \xC but
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// SMILANIM does not consider these characters to be whitespace.
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inline bool
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IsSpace(const PRUnichar c)
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{
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return (c == 0x9 || c == 0xA || c == 0xD || c == 0x20);
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}
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template<class T>
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inline void
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SkipBeginWsp(T& aStart, T aEnd)
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{
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while (aStart != aEnd && IsSpace(*aStart)) {
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++aStart;
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}
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}
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inline void
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SkipBeginEndWsp(const PRUnichar*& aStart, const PRUnichar*& aEnd)
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{
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SkipBeginWsp(aStart, aEnd);
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while (aEnd != aStart && IsSpace(*(aEnd - 1))) {
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--aEnd;
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}
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}
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double
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GetFloat(const char*& aStart, const char* aEnd, nsresult* aErrorCode)
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{
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char* floatEnd;
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double value = PR_strtod(aStart, &floatEnd);
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nsresult rv;
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if (floatEnd == aStart || floatEnd > aEnd) {
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rv = NS_ERROR_FAILURE;
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} else {
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aStart = floatEnd;
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rv = NS_OK;
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}
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if (aErrorCode) {
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*aErrorCode = rv;
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}
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return value;
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}
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size_t
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GetUnsignedInt(const nsAString& aStr, PRUint32& aResult)
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{
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NS_ConvertUTF16toUTF8 cstr(aStr);
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const char* str = cstr.get();
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char* rest;
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PRInt32 value = strtol(str, &rest, DECIMAL_BASE);
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if (rest == str || value < 0)
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return 0;
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aResult = static_cast<PRUint32>(value);
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return rest - str;
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}
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bool
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GetUnsignedIntAndEndParen(const nsAString& aStr, PRUint32& aResult)
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{
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size_t intLen = GetUnsignedInt(aStr, aResult);
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const PRUnichar* start = aStr.BeginReading();
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const PRUnichar* end = aStr.EndReading();
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// Make sure the string is only digit+')'
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if (intLen == 0 || start + intLen + 1 != end || *(start + intLen) != ')')
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return false;
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return true;
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}
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inline bool
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ConsumeSubstring(const char*& aStart, const char* aEnd, const char* aSubstring)
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{
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size_t substrLen = PL_strlen(aSubstring);
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if (static_cast<size_t>(aEnd - aStart) < substrLen)
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return false;
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bool result = false;
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if (PL_strstr(aStart, aSubstring) == aStart) {
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aStart += substrLen;
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result = true;
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}
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return result;
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}
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bool
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ParseClockComponent(const char*& aStart,
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const char* aEnd,
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double& aResult,
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bool& aIsReal,
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bool& aCouldBeMin,
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bool& aCouldBeSec)
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{
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nsresult rv;
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const char* begin = aStart;
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double value = GetFloat(aStart, aEnd, &rv);
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// Check a number was found
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if (NS_FAILED(rv))
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return false;
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// Check that it's not expressed in exponential form
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size_t len = aStart - begin;
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bool isExp = (PL_strnpbrk(begin, "eE", len) != nsnull);
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if (isExp)
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return false;
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// Don't allow real numbers of the form "23."
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if (*(aStart - 1) == '.')
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return false;
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// Number looks good
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aResult = value;
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// Set some flags so we can check this number is valid once we know
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// whether it's an hour, minute string etc.
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aIsReal = (PL_strnchr(begin, '.', len) != nsnull);
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aCouldBeMin = (value < 60.0 && (len == 2));
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aCouldBeSec = (value < 60.0 ||
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(value == 60.0 && begin[0] == '5')); // Take care of rounding error
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aCouldBeSec &= (len >= 2 &&
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(begin[2] == '\0' || begin[2] == '.' || IsSpace(begin[2])));
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return true;
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}
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bool
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ParseMetricMultiplicand(const char*& aStart,
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const char* aEnd,
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PRInt32& multiplicand)
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{
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bool result = false;
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size_t len = aEnd - aStart;
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const char* cur = aStart;
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if (len) {
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switch (*cur++)
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{
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case 'h':
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multiplicand = MSEC_PER_HOUR;
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result = true;
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break;
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case 'm':
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if (len >= 2) {
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if (*cur == 's') {
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++cur;
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multiplicand = 1;
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result = true;
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} else if (len >= 3 && *cur++ == 'i' && *cur++ == 'n') {
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multiplicand = MSEC_PER_MIN;
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result = true;
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}
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}
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break;
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case 's':
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multiplicand = MSEC_PER_SEC;
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result = true;
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break;
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}
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}
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if (result) {
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aStart = cur;
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}
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return result;
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}
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nsresult
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ParseOptionalOffset(const nsAString& aSpec, nsSMILTimeValueSpecParams& aResult)
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{
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if (aSpec.IsEmpty()) {
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aResult.mOffset.SetMillis(0);
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return NS_OK;
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}
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if (aSpec.First() != '+' && aSpec.First() != '-')
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return NS_ERROR_FAILURE;
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return nsSMILParserUtils::ParseClockValue(aSpec, &aResult.mOffset,
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nsSMILParserUtils::kClockValueAllowSign);
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}
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nsresult
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ParseAccessKey(const nsAString& aSpec, nsSMILTimeValueSpecParams& aResult)
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{
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NS_ABORT_IF_FALSE(StringBeginsWith(aSpec, ACCESSKEY_PREFIX_CC) ||
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StringBeginsWith(aSpec, ACCESSKEY_PREFIX_LC),
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"Calling ParseAccessKey on non-accesskey-type spec");
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nsSMILTimeValueSpecParams result;
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result.mType = nsSMILTimeValueSpecParams::ACCESSKEY;
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NS_ABORT_IF_FALSE(
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ACCESSKEY_PREFIX_LC.Length() == ACCESSKEY_PREFIX_CC.Length(),
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"Case variations for accesskey prefix differ in length");
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const PRUnichar* start = aSpec.BeginReading() + ACCESSKEY_PREFIX_LC.Length();
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const PRUnichar* end = aSpec.EndReading();
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// Expecting at least <accesskey> + ')'
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if (end - start < 2)
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return NS_ERROR_FAILURE;
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PRUint32 c = *start++;
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// Process 32-bit codepoints
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if (NS_IS_HIGH_SURROGATE(c)) {
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if (end - start < 2) // Expecting at least low-surrogate + ')'
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return NS_ERROR_FAILURE;
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PRUint32 lo = *start++;
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if (!NS_IS_LOW_SURROGATE(lo))
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return NS_ERROR_FAILURE;
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c = SURROGATE_TO_UCS4(c, lo);
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// XML 1.1 says that 0xFFFE and 0xFFFF are not valid characters
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} else if (NS_IS_LOW_SURROGATE(c) || c == 0xFFFE || c == 0xFFFF) {
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return NS_ERROR_FAILURE;
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}
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result.mRepeatIterationOrAccessKey = c;
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if (*start++ != ')')
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return NS_ERROR_FAILURE;
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SkipBeginWsp(start, end);
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nsresult rv = ParseOptionalOffset(Substring(start, end), result);
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if (NS_FAILED(rv))
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return rv;
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aResult = result;
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return NS_OK;
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}
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const PRUnichar*
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GetTokenEnd(const nsAString& aStr, bool aBreakOnDot)
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{
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const PRUnichar* tokenEnd = aStr.BeginReading();
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const PRUnichar* const end = aStr.EndReading();
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bool escape = false;
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while (tokenEnd != end) {
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PRUnichar c = *tokenEnd;
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if (IsSpace(c) ||
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(!escape && (c == '+' || c == '-' || (aBreakOnDot && c == '.')))) {
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break;
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}
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escape = (!escape && c == '\\');
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++tokenEnd;
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}
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return tokenEnd;
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}
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void
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Unescape(nsAString& aStr)
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{
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const PRUnichar* read = aStr.BeginReading();
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const PRUnichar* const end = aStr.EndReading();
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PRUnichar* write = aStr.BeginWriting();
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bool escape = false;
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while (read != end) {
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NS_ABORT_IF_FALSE(write <= read, "Writing past where we've read");
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if (!escape && *read == '\\') {
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escape = true;
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++read;
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} else {
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*write++ = *read++;
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escape = false;
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}
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}
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aStr.SetLength(write - aStr.BeginReading());
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}
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nsresult
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ParseElementBaseTimeValueSpec(const nsAString& aSpec,
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nsSMILTimeValueSpecParams& aResult)
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{
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nsSMILTimeValueSpecParams result;
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//
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// The spec will probably look something like one of these
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//
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// element-name.begin
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// element-name.event-name
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// event-name
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// element-name.repeat(3)
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// event\.name
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//
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// Technically `repeat(3)' is permitted but the behaviour in this case is not
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// defined (for SMIL Animation) so we don't support it here.
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//
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const PRUnichar* tokenStart = aSpec.BeginReading();
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const PRUnichar* tokenEnd = GetTokenEnd(aSpec, true);
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nsAutoString token(Substring(tokenStart, tokenEnd));
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Unescape(token);
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if (token.IsEmpty())
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return NS_ERROR_FAILURE;
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// Whether the token is an id-ref or event-symbol it should be a valid NCName
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if (NS_FAILED(nsContentUtils::CheckQName(token, false)))
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return NS_ERROR_FAILURE;
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// Parse the second token if there is one
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if (tokenEnd != aSpec.EndReading() && *tokenEnd == '.') {
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result.mDependentElemID = do_GetAtom(token);
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tokenStart = ++tokenEnd;
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tokenEnd = GetTokenEnd(Substring(tokenStart, aSpec.EndReading()), false);
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// Don't unescape the token unless we need to and not until after we've
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// tested it
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const nsAString& rawToken2 = Substring(tokenStart, tokenEnd);
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// element-name.begin
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if (rawToken2.Equals(NS_LITERAL_STRING("begin"))) {
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result.mType = nsSMILTimeValueSpecParams::SYNCBASE;
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result.mSyncBegin = true;
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// element-name.end
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} else if (rawToken2.Equals(NS_LITERAL_STRING("end"))) {
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result.mType = nsSMILTimeValueSpecParams::SYNCBASE;
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result.mSyncBegin = false;
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// element-name.repeat(digit+)
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} else if (StringBeginsWith(rawToken2, REPEAT_PREFIX)) {
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result.mType = nsSMILTimeValueSpecParams::REPEAT;
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if (!GetUnsignedIntAndEndParen(
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Substring(tokenStart + REPEAT_PREFIX.Length(), tokenEnd),
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result.mRepeatIterationOrAccessKey))
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return NS_ERROR_FAILURE;
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// element-name.event-symbol
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} else {
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nsAutoString token2(rawToken2);
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Unescape(token2);
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result.mType = nsSMILTimeValueSpecParams::EVENT;
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if (token2.IsEmpty() ||
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NS_FAILED(nsContentUtils::CheckQName(token2, false)))
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return NS_ERROR_FAILURE;
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result.mEventSymbol = do_GetAtom(token2);
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}
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} else {
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// event-symbol
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result.mType = nsSMILTimeValueSpecParams::EVENT;
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result.mEventSymbol = do_GetAtom(token);
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}
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// We've reached the end of the token, so we should now be either looking at
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// a '+', '-', or the end.
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const PRUnichar* specEnd = aSpec.EndReading();
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SkipBeginWsp(tokenEnd, specEnd);
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nsresult rv = ParseOptionalOffset(Substring(tokenEnd, specEnd), result);
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if (NS_SUCCEEDED(rv)) {
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aResult = result;
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}
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return rv;
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}
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} // end anonymous namespace block
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//------------------------------------------------------------------------------
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// Implementation
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nsresult
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nsSMILParserUtils::ParseKeySplines(const nsAString& aSpec,
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nsTArray<double>& aSplineArray)
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{
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nsresult rv = NS_OK;
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NS_ConvertUTF16toUTF8 spec(aSpec);
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const char* start = spec.BeginReading();
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const char* end = spec.EndReading();
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SkipBeginWsp(start, end);
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int i = 0;
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while (start != end)
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{
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double value = GetFloat(start, end, &rv);
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if (NS_FAILED(rv))
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break;
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if (value > 1.0 || value < 0.0) {
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rv = NS_ERROR_FAILURE;
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break;
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}
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if (!aSplineArray.AppendElement(value)) {
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rv = NS_ERROR_OUT_OF_MEMORY;
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break;
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}
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++i;
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SkipBeginWsp(start, end);
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if (start == end)
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break;
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if (i % 4) {
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if (*start == ',') {
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++start;
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}
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} else {
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if (*start != ';') {
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rv = NS_ERROR_FAILURE;
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break;
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}
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++start;
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}
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SkipBeginWsp(start, end);
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}
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if (i % 4) {
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rv = NS_ERROR_FAILURE; // wrong number of points
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}
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return rv;
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}
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nsresult
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nsSMILParserUtils::ParseSemicolonDelimitedProgressList(const nsAString& aSpec,
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bool aNonDecreasing,
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nsTArray<double>& aArray)
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{
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nsresult rv = NS_OK;
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NS_ConvertUTF16toUTF8 spec(aSpec);
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const char* start = spec.BeginReading();
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const char* end = spec.EndReading();
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SkipBeginWsp(start, end);
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double previousValue = -1.0;
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while (start != end) {
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double value = GetFloat(start, end, &rv);
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if (NS_FAILED(rv))
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break;
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if (value > 1.0 || value < 0.0 ||
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(aNonDecreasing && value < previousValue)) {
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rv = NS_ERROR_FAILURE;
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break;
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}
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if (!aArray.AppendElement(value)) {
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rv = NS_ERROR_OUT_OF_MEMORY;
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break;
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}
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previousValue = value;
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SkipBeginWsp(start, end);
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if (start == end)
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break;
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if (*start++ != ';') {
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rv = NS_ERROR_FAILURE;
|
|
break;
|
|
}
|
|
|
|
SkipBeginWsp(start, end);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
// Helper class for ParseValues
|
|
class SMILValueParser : public nsSMILParserUtils::GenericValueParser
|
|
{
|
|
public:
|
|
SMILValueParser(const nsISMILAnimationElement* aSrcElement,
|
|
const nsISMILAttr* aSMILAttr,
|
|
nsTArray<nsSMILValue>* aValuesArray,
|
|
bool* aPreventCachingOfSandwich) :
|
|
mSrcElement(aSrcElement),
|
|
mSMILAttr(aSMILAttr),
|
|
mValuesArray(aValuesArray),
|
|
mPreventCachingOfSandwich(aPreventCachingOfSandwich)
|
|
{}
|
|
|
|
virtual nsresult Parse(const nsAString& aValueStr) {
|
|
nsSMILValue newValue;
|
|
bool tmpPreventCachingOfSandwich = false;
|
|
nsresult rv = mSMILAttr->ValueFromString(aValueStr, mSrcElement, newValue,
|
|
tmpPreventCachingOfSandwich);
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
|
|
if (!mValuesArray->AppendElement(newValue)) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
if (tmpPreventCachingOfSandwich) {
|
|
*mPreventCachingOfSandwich = true;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
protected:
|
|
const nsISMILAnimationElement* mSrcElement;
|
|
const nsISMILAttr* mSMILAttr;
|
|
nsTArray<nsSMILValue>* mValuesArray;
|
|
bool* mPreventCachingOfSandwich;
|
|
};
|
|
|
|
nsresult
|
|
nsSMILParserUtils::ParseValues(const nsAString& aSpec,
|
|
const nsISMILAnimationElement* aSrcElement,
|
|
const nsISMILAttr& aAttribute,
|
|
nsTArray<nsSMILValue>& aValuesArray,
|
|
bool& aPreventCachingOfSandwich)
|
|
{
|
|
// Assume all results can be cached, until we find one that can't.
|
|
aPreventCachingOfSandwich = false;
|
|
SMILValueParser valueParser(aSrcElement, &aAttribute,
|
|
&aValuesArray, &aPreventCachingOfSandwich);
|
|
return ParseValuesGeneric(aSpec, valueParser);
|
|
}
|
|
|
|
nsresult
|
|
nsSMILParserUtils::ParseValuesGeneric(const nsAString& aSpec,
|
|
GenericValueParser& aParser)
|
|
{
|
|
nsCharSeparatedTokenizer tokenizer(aSpec, ';');
|
|
if (!tokenizer.hasMoreTokens()) { // Empty list
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
while (tokenizer.hasMoreTokens()) {
|
|
nsresult rv = aParser.Parse(tokenizer.nextToken());
|
|
if (NS_FAILED(rv)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsSMILParserUtils::ParseRepeatCount(const nsAString& aSpec,
|
|
nsSMILRepeatCount& aResult)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
|
|
NS_ConvertUTF16toUTF8 spec(aSpec);
|
|
const char* start = spec.BeginReading();
|
|
const char* end = spec.EndReading();
|
|
|
|
SkipBeginWsp(start, end);
|
|
|
|
if (start != end)
|
|
{
|
|
if (ConsumeSubstring(start, end, "indefinite")) {
|
|
aResult.SetIndefinite();
|
|
} else {
|
|
double value = GetFloat(start, end, &rv);
|
|
|
|
if (NS_SUCCEEDED(rv))
|
|
{
|
|
/* Repeat counts must be > 0 */
|
|
if (value <= 0.0) {
|
|
rv = NS_ERROR_FAILURE;
|
|
} else {
|
|
aResult = value;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Check for trailing junk */
|
|
SkipBeginWsp(start, end);
|
|
if (start != end) {
|
|
rv = NS_ERROR_FAILURE;
|
|
}
|
|
} else {
|
|
/* Empty spec */
|
|
rv = NS_ERROR_FAILURE;
|
|
}
|
|
|
|
if (NS_FAILED(rv)) {
|
|
aResult.Unset();
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult
|
|
nsSMILParserUtils::ParseTimeValueSpecParams(const nsAString& aSpec,
|
|
nsSMILTimeValueSpecParams& aResult)
|
|
{
|
|
nsresult rv = NS_ERROR_FAILURE;
|
|
|
|
const PRUnichar* start = aSpec.BeginReading();
|
|
const PRUnichar* end = aSpec.EndReading();
|
|
|
|
SkipBeginEndWsp(start, end);
|
|
if (start == end)
|
|
return rv;
|
|
|
|
const nsAString &spec = Substring(start, end);
|
|
|
|
// offset type
|
|
if (*start == '+' || *start == '-' || NS_IsAsciiDigit(*start)) {
|
|
rv = ParseClockValue(spec, &aResult.mOffset,
|
|
nsSMILParserUtils::kClockValueAllowSign);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
aResult.mType = nsSMILTimeValueSpecParams::OFFSET;
|
|
}
|
|
}
|
|
|
|
// indefinite
|
|
else if (spec.Equals(NS_LITERAL_STRING("indefinite"))) {
|
|
aResult.mType = nsSMILTimeValueSpecParams::INDEFINITE;
|
|
rv = NS_OK;
|
|
}
|
|
|
|
// wallclock type
|
|
else if (StringBeginsWith(spec, WALLCLOCK_PREFIX)) {
|
|
rv = NS_ERROR_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
// accesskey type
|
|
else if (StringBeginsWith(spec, ACCESSKEY_PREFIX_LC) ||
|
|
StringBeginsWith(spec, ACCESSKEY_PREFIX_CC)) {
|
|
rv = ParseAccessKey(spec, aResult);
|
|
}
|
|
|
|
// event, syncbase, or repeat
|
|
else {
|
|
rv = ParseElementBaseTimeValueSpec(spec, aResult);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult
|
|
nsSMILParserUtils::ParseClockValue(const nsAString& aSpec,
|
|
nsSMILTimeValue* aResult,
|
|
PRUint32 aFlags, // = 0
|
|
bool* aIsMedia) // = nsnull
|
|
{
|
|
nsSMILTime offset = 0L;
|
|
double component = 0.0;
|
|
|
|
PRInt8 sign = 0;
|
|
PRUint8 colonCount = 0;
|
|
|
|
// Indicates we have started parsing a clock-value (not including the optional
|
|
// +/- that precedes the clock-value) or keyword ("media", "indefinite")
|
|
bool started = false;
|
|
|
|
PRInt32 metricMultiplicand = MSEC_PER_SEC;
|
|
|
|
bool numIsReal = false;
|
|
bool prevNumCouldBeMin = false;
|
|
bool numCouldBeMin = false;
|
|
bool numCouldBeSec = false;
|
|
bool isIndefinite = false;
|
|
|
|
if (aIsMedia) {
|
|
*aIsMedia = false;
|
|
}
|
|
|
|
NS_ConvertUTF16toUTF8 spec(aSpec);
|
|
const char* start = spec.BeginReading();
|
|
const char* end = spec.EndReading();
|
|
|
|
while (start != end) {
|
|
if (IsSpace(*start)) {
|
|
++start;
|
|
if (started) {
|
|
break;
|
|
}
|
|
} else if (!started && (aFlags & kClockValueAllowSign) &&
|
|
(*start == '+' || *start == '-')) {
|
|
// check sign has not already been set (e.g. ++10s)
|
|
if (sign != 0) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
sign = (*start == '+') ? 1 : -1;
|
|
++start;
|
|
// The NS_IS_DIGIT etc. macros are not locale-specific
|
|
} else if (NS_IS_DIGIT(*start)) {
|
|
prevNumCouldBeMin = numCouldBeMin;
|
|
|
|
if (!ParseClockComponent(start, end, component, numIsReal, numCouldBeMin,
|
|
numCouldBeSec)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
started = true;
|
|
} else if (started && *start == ':') {
|
|
++colonCount;
|
|
|
|
// Neither minutes nor hours can be reals
|
|
if (numIsReal) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Can't have more than two colons
|
|
if (colonCount > 2) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Multiply the offset by 60 and add the last accumulated component
|
|
offset = offset * 60 + nsSMILTime(component);
|
|
|
|
component = 0.0;
|
|
++start;
|
|
} else if (NS_IS_ALPHA(*start)) {
|
|
if (colonCount > 0) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
if (!started && (aFlags & kClockValueAllowIndefinite) &&
|
|
ConsumeSubstring(start, end, "indefinite")) {
|
|
// We set a separate flag because we don't know what the state of the
|
|
// passed in time value is and we shouldn't change it in the case of a
|
|
// bad input string (so we can't initialise it to 0ms for example).
|
|
isIndefinite = true;
|
|
if (aResult) {
|
|
aResult->SetIndefinite();
|
|
}
|
|
started = true;
|
|
} else if (!started && aIsMedia &&
|
|
ConsumeSubstring(start, end, "media")) {
|
|
*aIsMedia = true;
|
|
started = true;
|
|
} else if (!ParseMetricMultiplicand(start, end, metricMultiplicand)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Nothing must come after the string except whitespace
|
|
break;
|
|
} else {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
}
|
|
|
|
// Whitespace/empty string
|
|
if (!started) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Process remainder of string (if any) to ensure it is only trailing
|
|
// whitespace (embedded whitespace is not allowed)
|
|
SkipBeginWsp(start, end);
|
|
if (start != end) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// No more processing required if the value was "indefinite" or "media".
|
|
if (isIndefinite || (aIsMedia && *aIsMedia)) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// If there is more than one colon then the previous component must be a
|
|
// correctly formatted minute (i.e. two digits between 00 and 59) and the
|
|
// latest component must be a correctly formatted second (i.e. two digits
|
|
// before the .)
|
|
if (colonCount > 0 && (!prevNumCouldBeMin || !numCouldBeSec)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Tack on the last component
|
|
if (colonCount > 0) {
|
|
offset *= 60 * 1000;
|
|
component *= 1000;
|
|
// rounding
|
|
component = (component >= 0) ? component + 0.5 : component - 0.5;
|
|
offset += nsSMILTime(component);
|
|
} else {
|
|
component *= metricMultiplicand;
|
|
// rounding
|
|
component = (component >= 0) ? component + 0.5 : component - 0.5;
|
|
offset = nsSMILTime(component);
|
|
}
|
|
|
|
// we haven't applied the sign yet so if the result is negative we must have
|
|
// overflowed
|
|
if (offset < 0) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
if (aResult) {
|
|
if (sign == -1) {
|
|
offset = -offset;
|
|
}
|
|
aResult->SetMillis(offset);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
PRInt32
|
|
nsSMILParserUtils::CheckForNegativeNumber(const nsAString& aStr)
|
|
{
|
|
PRInt32 absValLocation = -1;
|
|
|
|
nsAString::const_iterator start, end;
|
|
aStr.BeginReading(start);
|
|
aStr.EndReading(end);
|
|
|
|
// Skip initial whitespace
|
|
SkipBeginWsp(start, end);
|
|
|
|
// Check for dash
|
|
if (start != end && *start == '-') {
|
|
++start;
|
|
// Check for numeric character
|
|
if (start != end && NS_IS_DIGIT(*start)) {
|
|
absValLocation = start.get() - start.start();
|
|
}
|
|
}
|
|
return absValLocation;
|
|
}
|