LCOV - code coverage report
Current view: directory - content/html/content/src - nsMediaFragmentURIParser.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 175 0 0.0 %
Date: 2012-06-02 Functions: 15 0 0.0 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* vim:set ts=2 sw=2 sts=2 et cindent: */
       3                 : /* ***** BEGIN LICENSE BLOCK *****
       4                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       5                 :  *
       6                 :  * The contents of this file are subject to the Mozilla Public License Version
       7                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       8                 :  * the License. You may obtain a copy of the License at
       9                 :  * http://www.mozilla.org/MPL/
      10                 :  *
      11                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      12                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      13                 :  * for the specific language governing rights and limitations under the
      14                 :  * License.
      15                 :  *
      16                 :  * The Original Code is the media fragment URI parser.
      17                 :  *
      18                 :  * The Initial Developer of the Original Code is the Mozilla Foundation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 2011
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *   Chris Double <chris.double@double.co.nz>
      24                 :  *
      25                 :  * Alternatively, the contents of this file may be used under the terms of
      26                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      27                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      28                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      29                 :  * of those above. If you wish to allow use of your version of this file only
      30                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      31                 :  * use your version of this file under the terms of the MPL, indicate your
      32                 :  * decision by deleting the provisions above and replace them with the notice
      33                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      34                 :  * the provisions above, a recipient may use your version of this file under
      35                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      36                 :  *
      37                 :  * ***** END LICENSE BLOCK ***** */
      38                 : #include "nsCharSeparatedTokenizer.h"
      39                 : #include "nsEscape.h"
      40                 : #include "nsMediaFragmentURIParser.h"
      41                 : 
      42               0 : nsMediaFragmentURIParser::nsMediaFragmentURIParser(const nsCString& aSpec)
      43                 : {
      44               0 :   nsReadingIterator<char> start, end;
      45               0 :   aSpec.BeginReading(start);
      46               0 :   aSpec.EndReading(end);
      47               0 :   if (FindCharInReadable('#', start, end)) {
      48               0 :     mHash = Substring(++start, end);
      49                 :   }
      50               0 : }
      51                 : 
      52               0 : bool nsMediaFragmentURIParser::ParseNPT(nsDependentSubstring& aString, double& aStart, double& aEnd)
      53                 : {
      54               0 :   nsDependentSubstring original(aString);
      55               0 :   if (aString.Length() > 4 &&
      56               0 :       aString[0] == 'n' && aString[1] == 'p' &&
      57               0 :       aString[2] == 't' && aString[3] == ':') {
      58               0 :     aString.Rebind(aString, 4);
      59                 :   }
      60                 : 
      61               0 :   if (aString.Length() == 0) {
      62               0 :     return false;
      63                 :   }
      64                 : 
      65               0 :   double start = -1.0;
      66               0 :   double end = -1.0;
      67                 : 
      68               0 :   if (ParseNPTTime(aString, start)) {
      69               0 :     aStart = start;
      70                 :   }
      71                 : 
      72               0 :   if (aString.Length() == 0) {
      73               0 :     return true;
      74                 :   }
      75                 : 
      76               0 :   if (aString[0] != ',') {
      77               0 :     aString.Rebind(original, 0);
      78               0 :     return false;
      79                 :   }
      80                 : 
      81               0 :   aString.Rebind(aString, 1);
      82                 : 
      83               0 :   if (aString.Length() == 0) {
      84               0 :     aString.Rebind(original, 0);
      85               0 :     return false;
      86                 :   }
      87                 : 
      88               0 :   if (ParseNPTTime(aString, end)) {
      89               0 :     aEnd = end;
      90                 :   }
      91                 : 
      92               0 :   if (aString.Length() != 0) {
      93               0 :     aString.Rebind(original, 0);
      94               0 :     return false;
      95                 :   }
      96                 : 
      97               0 :   return true;
      98                 : }
      99                 : 
     100               0 : bool nsMediaFragmentURIParser::ParseNPTTime(nsDependentSubstring& aString, double& aTime)
     101                 : {
     102               0 :   if (aString.Length() == 0) {
     103               0 :     return false;
     104                 :   }
     105                 : 
     106                 :   return
     107               0 :     ParseNPTHHMMSS(aString, aTime) ||
     108               0 :     ParseNPTMMSS(aString, aTime) ||
     109               0 :     ParseNPTSec(aString, aTime);
     110                 : }
     111                 : 
     112                 : // Return true if the given character is a numeric character
     113               0 : static bool IsDigit(nsDependentSubstring::char_type aChar)
     114                 : {
     115               0 :   return (aChar >= '0' && aChar <= '9');
     116                 : }
     117                 : 
     118                 : // Return the index of the first character in the string that is not
     119                 : // a numerical digit, starting from 'aStart'.
     120               0 : static PRUint32 FirstNonDigit(nsDependentSubstring& aString, PRUint32 aStart)
     121                 : {
     122               0 :    while (aStart < aString.Length() && IsDigit(aString[aStart])) {
     123               0 :     ++aStart;
     124                 :   }
     125               0 :   return aStart;
     126                 : }
     127                 :  
     128               0 : bool nsMediaFragmentURIParser::ParseNPTSec(nsDependentSubstring& aString, double& aSec)
     129                 : {
     130               0 :   nsDependentSubstring original(aString);
     131               0 :   if (aString.Length() == 0) {
     132               0 :     return false;
     133                 :   }
     134                 : 
     135               0 :   PRUint32 index = FirstNonDigit(aString, 0);
     136               0 :   if (index == 0) {
     137               0 :     return false;
     138                 :   }
     139                 : 
     140               0 :   nsDependentSubstring n(aString, 0, index);
     141                 :   PRInt32 ec;
     142               0 :   PRInt32 s = PromiseFlatString(n).ToInteger(&ec);
     143               0 :   if (NS_FAILED(ec)) {
     144               0 :     return false;
     145                 :   }
     146                 : 
     147               0 :   aString.Rebind(aString, index);
     148               0 :   double fraction = 0.0;
     149               0 :   if (!ParseNPTFraction(aString, fraction)) {
     150               0 :     aString.Rebind(original, 0);
     151               0 :     return false;
     152                 :   }
     153                 : 
     154               0 :   aSec = s + fraction;
     155               0 :   return true;
     156                 : }
     157                 : 
     158               0 : bool nsMediaFragmentURIParser::ParseNPTMMSS(nsDependentSubstring& aString, double& aTime)
     159                 : {
     160               0 :   nsDependentSubstring original(aString);
     161               0 :   PRUint32 mm = 0;
     162               0 :   PRUint32 ss = 0;
     163               0 :   double fraction = 0.0;
     164               0 :   if (!ParseNPTMM(aString, mm)) {
     165               0 :     aString.Rebind(original, 0);
     166               0 :     return false;
     167                 :   }
     168                 : 
     169               0 :   if (aString.Length() < 2 || aString[0] != ':') {
     170               0 :     aString.Rebind(original, 0);
     171               0 :     return false;
     172                 :   }
     173                 : 
     174               0 :   aString.Rebind(aString, 1);
     175               0 :   if (!ParseNPTSS(aString, ss)) {
     176               0 :     aString.Rebind(original, 0);
     177               0 :     return false;
     178                 :   }
     179                 : 
     180               0 :   if (!ParseNPTFraction(aString, fraction)) {
     181               0 :     aString.Rebind(original, 0);
     182               0 :     return false;
     183                 :   }
     184               0 :   aTime = mm * 60 + ss + fraction;
     185               0 :   return true;
     186                 : }
     187                 : 
     188               0 : bool nsMediaFragmentURIParser::ParseNPTFraction(nsDependentSubstring& aString, double& aFraction)
     189                 : {
     190               0 :   double fraction = 0.0;
     191                 : 
     192               0 :   if (aString.Length() > 0 && aString[0] == '.') {
     193               0 :     PRUint32 index = FirstNonDigit(aString, 1);
     194                 : 
     195               0 :     if (index > 1) {
     196               0 :       nsDependentSubstring number(aString, 0, index);
     197                 :       PRInt32 ec;
     198               0 :       fraction = PromiseFlatString(number).ToDouble(&ec);
     199               0 :       if (NS_FAILED(ec)) {
     200               0 :         return false;
     201                 :       }
     202                 :     }
     203               0 :     aString.Rebind(aString, index);
     204                 :   }
     205                 : 
     206               0 :   aFraction = fraction;
     207               0 :   return true;
     208                 : }
     209                 : 
     210               0 : bool nsMediaFragmentURIParser::ParseNPTHHMMSS(nsDependentSubstring& aString, double& aTime)
     211                 : {
     212               0 :   nsDependentSubstring original(aString);
     213               0 :   PRUint32 hh = 0;
     214               0 :   double seconds = 0.0;
     215               0 :   if (!ParseNPTHH(aString, hh)) {
     216               0 :     return false;
     217                 :   }
     218                 : 
     219               0 :   if (aString.Length() < 2 || aString[0] != ':') {
     220               0 :     aString.Rebind(original, 0);
     221               0 :     return false;
     222                 :   }
     223                 : 
     224               0 :   aString.Rebind(aString, 1);
     225               0 :   if (!ParseNPTMMSS(aString, seconds)) {
     226               0 :     aString.Rebind(original, 0);
     227               0 :     return false;
     228                 :   }
     229                 : 
     230               0 :   aTime = hh * 3600 + seconds;
     231               0 :   return true;
     232                 : }
     233                 : 
     234               0 : bool nsMediaFragmentURIParser::ParseNPTHH(nsDependentSubstring& aString, PRUint32& aHour)
     235                 : {
     236               0 :   if (aString.Length() == 0) {
     237               0 :     return false;
     238                 :   }
     239                 : 
     240               0 :   PRUint32 index = FirstNonDigit(aString, 0);
     241               0 :   if (index == 0) {
     242               0 :     return false;
     243                 :   }
     244                 : 
     245               0 :   nsDependentSubstring n(aString, 0, index);
     246                 :   PRInt32 ec;
     247               0 :   PRInt32 u = PromiseFlatString(n).ToInteger(&ec);
     248               0 :   if (NS_FAILED(ec)) {
     249               0 :     return false;
     250                 :   }
     251                 : 
     252               0 :   aString.Rebind(aString, index);
     253               0 :   aHour = u;
     254               0 :   return true;
     255                 : }
     256                 : 
     257               0 : bool nsMediaFragmentURIParser::ParseNPTMM(nsDependentSubstring& aString, PRUint32& aMinute)
     258                 : {
     259               0 :   return ParseNPTSS(aString, aMinute);
     260                 : }
     261                 : 
     262               0 : bool nsMediaFragmentURIParser::ParseNPTSS(nsDependentSubstring& aString, PRUint32& aSecond)
     263                 : {
     264               0 :   if (aString.Length() < 2) {
     265               0 :     return false;
     266                 :   }
     267                 : 
     268               0 :   if (IsDigit(aString[0]) && IsDigit(aString[1])) {
     269               0 :     nsDependentSubstring n(aString, 0, 2);
     270                 :     PRInt32 ec;
     271                 : 
     272               0 :     PRInt32 u = PromiseFlatString(n).ToInteger(&ec);
     273               0 :     if (NS_FAILED(ec)) {
     274               0 :       return false;
     275                 :     }
     276                 : 
     277               0 :     aString.Rebind(aString, 2);
     278               0 :     if (u >= 60)
     279               0 :       return false;
     280                 : 
     281               0 :     aSecond = u;
     282               0 :     return true;
     283                 :   }
     284                 : 
     285               0 :   return false;
     286                 : }
     287                 : 
     288               0 : void nsMediaFragmentURIParser::Parse()
     289                 : {
     290               0 :   nsCCharSeparatedTokenizer tokenizer(mHash, '&');
     291               0 :   while (tokenizer.hasMoreTokens()) {
     292               0 :     const nsCSubstring& nv = tokenizer.nextToken();
     293               0 :     PRInt32 index = nv.FindChar('=');
     294               0 :     if (index >= 0) {
     295               0 :       nsCAutoString name;
     296               0 :       nsCAutoString value;
     297               0 :       NS_UnescapeURL(StringHead(nv, index), esc_Ref | esc_AlwaysCopy, name);
     298               0 :       NS_UnescapeURL(Substring(nv, index + 1, nv.Length()),
     299               0 :                      esc_Ref | esc_AlwaysCopy, value);
     300               0 :       nsAutoString a = NS_ConvertUTF8toUTF16(name);
     301               0 :       nsAutoString b = NS_ConvertUTF8toUTF16(value);
     302               0 :       mFragments.AppendElement(Pair(a, b));
     303                 :     }
     304                 :   }
     305               0 : }
     306                 : 
     307               0 : double nsMediaFragmentURIParser::GetStartTime()
     308                 : {
     309               0 :   for (PRUint32 i = 0; i < mFragments.Length(); ++i) {
     310               0 :     PRUint32 index = mFragments.Length() - i - 1;
     311               0 :     if (mFragments[index].mName.EqualsLiteral("t")) {
     312               0 :       double start = -1;
     313               0 :       double end = -1;
     314               0 :       nsDependentSubstring s(mFragments[index].mValue, 0);
     315               0 :       if (ParseNPT(s, start, end)) {
     316               0 :         return start;
     317                 :       }
     318                 :     }
     319                 :   }
     320               0 :   return 0.0;
     321                 : }
     322                 : 
     323               0 : double nsMediaFragmentURIParser::GetEndTime()
     324                 : {
     325               0 :   for (PRUint32 i = 0; i < mFragments.Length(); ++i) {
     326               0 :     PRUint32 index = mFragments.Length() - i - 1;
     327               0 :     if (mFragments[index].mName.EqualsLiteral("t")) {
     328               0 :       double start = -1;
     329               0 :       double end = -1;
     330               0 :       nsDependentSubstring s(mFragments[index].mValue, 0);
     331               0 :       if (ParseNPT(s, start, end)) {
     332               0 :         return end;
     333                 :       }
     334                 :     }
     335                 :   }
     336               0 :   return -1;
     337                 : }
     338                 : 
     339                 : 

Generated by: LCOV version 1.7