Add m-esr52 at 52.6.0

1 files changed, 390 insertions, 0 deletions

diff --git a/netwerk/base/nsMediaFragmentURIParser.cpp b/netwerk/base/nsMediaFragmentURIParser.cpp
new file mode 100644
index 000000000..af73fe52c
--- /dev/null
+++ b/netwerk/base/nsMediaFragmentURIParser.cpp
@@ -0,0 +1,390 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* 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 "nsTArray.h"
+#include "nsCharSeparatedTokenizer.h"
+#include "nsEscape.h"
+#include "nsIURI.h"
+#include <utility>
+
+#include "nsMediaFragmentURIParser.h"
+
+using std::pair;
+using std::make_pair;
+
+namespace mozilla { namespace net {
+
+nsMediaFragmentURIParser::nsMediaFragmentURIParser(nsIURI* aURI)
+  : mClipUnit(eClipUnit_Pixel)
+{
+  nsAutoCString ref;
+  aURI->GetRef(ref);
+  Parse(ref);
+}
+
+nsMediaFragmentURIParser::nsMediaFragmentURIParser(nsCString& aRef)
+  : mClipUnit(eClipUnit_Pixel)
+{
+  Parse(aRef);
+}
+
+bool nsMediaFragmentURIParser::ParseNPT(nsDependentSubstring aString)
+{
+  nsDependentSubstring original(aString);
+  if (aString.Length() > 4 &&
+      aString[0] == 'n' && aString[1] == 'p' &&
+      aString[2] == 't' && aString[3] == ':') {
+    aString.Rebind(aString, 4);
+  }
+
+  if (aString.Length() == 0) {
+    return false;
+  }
+
+  double start = -1.0;
+  double end = -1.0;
+
+  ParseNPTTime(aString, start);
+
+  if (aString.Length() == 0) {
+    mStart.emplace(start);
+    return true;
+  }
+
+  if (aString[0] != ',') {
+    aString.Rebind(original, 0);
+    return false;
+  }
+
+  aString.Rebind(aString, 1);
+
+  if (aString.Length() == 0) {
+    aString.Rebind(original, 0);
+    return false;
+  }
+
+  ParseNPTTime(aString, end);
+
+  if (end <= start || aString.Length() != 0) {
+    aString.Rebind(original, 0);
+    return false;
+  }
+
+  mStart.emplace(start);
+  mEnd.emplace(end);
+  return true;
+}
+
+bool nsMediaFragmentURIParser::ParseNPTTime(nsDependentSubstring& aString, double& aTime)
+{
+  if (aString.Length() == 0) {
+    return false;
+  }
+
+  return
+    ParseNPTHHMMSS(aString, aTime) ||
+    ParseNPTMMSS(aString, aTime) ||
+    ParseNPTSec(aString, aTime);
+}
+
+// Return true if the given character is a numeric character
+static bool IsDigit(nsDependentSubstring::char_type aChar)
+{
+  return (aChar >= '0' && aChar <= '9');
+}
+
+// Return the index of the first character in the string that is not
+// a numerical digit, starting from 'aStart'.
+static uint32_t FirstNonDigit(nsDependentSubstring& aString, uint32_t aStart)
+{
+   while (aStart < aString.Length() && IsDigit(aString[aStart])) {
+    ++aStart;
+  }
+  return aStart;
+}
+ 
+bool nsMediaFragmentURIParser::ParseNPTSec(nsDependentSubstring& aString, double& aSec)
+{
+  nsDependentSubstring original(aString);
+  if (aString.Length() == 0) {
+    return false;
+  }
+
+  uint32_t index = FirstNonDigit(aString, 0);
+  if (index == 0) {
+    return false;
+  }
+
+  nsDependentSubstring n(aString, 0, index);
+  nsresult ec;
+  int32_t s = PromiseFlatString(n).ToInteger(&ec);
+  if (NS_FAILED(ec)) {
+    return false;
+  }
+
+  aString.Rebind(aString, index);
+  double fraction = 0.0;
+  if (!ParseNPTFraction(aString, fraction)) {
+    aString.Rebind(original, 0);
+    return false;
+  }
+
+  aSec = s + fraction;
+  return true;
+}
+
+bool nsMediaFragmentURIParser::ParseNPTMMSS(nsDependentSubstring& aString, double& aTime)
+{
+  nsDependentSubstring original(aString);
+  uint32_t mm = 0;
+  uint32_t ss = 0;
+  double fraction = 0.0;
+  if (!ParseNPTMM(aString, mm)) {
+    aString.Rebind(original, 0);
+    return false;
+  }
+
+  if (aString.Length() < 2 || aString[0] != ':') {
+    aString.Rebind(original, 0);
+    return false;
+  }
+
+  aString.Rebind(aString, 1);
+  if (!ParseNPTSS(aString, ss)) {
+    aString.Rebind(original, 0);
+    return false;
+  }
+
+  if (!ParseNPTFraction(aString, fraction)) {
+    aString.Rebind(original, 0);
+    return false;
+  }
+  aTime = mm * 60 + ss + fraction;
+  return true;
+}
+
+bool nsMediaFragmentURIParser::ParseNPTFraction(nsDependentSubstring& aString, double& aFraction)
+{
+  double fraction = 0.0;
+
+  if (aString.Length() > 0 && aString[0] == '.') {
+    uint32_t index = FirstNonDigit(aString, 1);
+
+    if (index > 1) {
+      nsDependentSubstring number(aString, 0, index);
+      nsresult ec;
+      fraction = PromiseFlatString(number).ToDouble(&ec);
+      if (NS_FAILED(ec)) {
+        return false;
+      }
+    }
+    aString.Rebind(aString, index);
+  }
+
+  aFraction = fraction;
+  return true;
+}
+
+bool nsMediaFragmentURIParser::ParseNPTHHMMSS(nsDependentSubstring& aString, double& aTime)
+{
+  nsDependentSubstring original(aString);
+  uint32_t hh = 0;
+  double seconds = 0.0;
+  if (!ParseNPTHH(aString, hh)) {
+    return false;
+  }
+
+  if (aString.Length() < 2 || aString[0] != ':') {
+    aString.Rebind(original, 0);
+    return false;
+  }
+
+  aString.Rebind(aString, 1);
+  if (!ParseNPTMMSS(aString, seconds)) {
+    aString.Rebind(original, 0);
+    return false;
+  }
+
+  aTime = hh * 3600 + seconds;
+  return true;
+}
+
+bool nsMediaFragmentURIParser::ParseNPTHH(nsDependentSubstring& aString, uint32_t& aHour)
+{
+  if (aString.Length() == 0) {
+    return false;
+  }
+
+  uint32_t index = FirstNonDigit(aString, 0);
+  if (index == 0) {
+    return false;
+  }
+
+  nsDependentSubstring n(aString, 0, index);
+  nsresult ec;
+  int32_t u = PromiseFlatString(n).ToInteger(&ec);
+  if (NS_FAILED(ec)) {
+    return false;
+  }
+
+  aString.Rebind(aString, index);
+  aHour = u;
+  return true;
+}
+
+bool nsMediaFragmentURIParser::ParseNPTMM(nsDependentSubstring& aString, uint32_t& aMinute)
+{
+  return ParseNPTSS(aString, aMinute);
+}
+
+bool nsMediaFragmentURIParser::ParseNPTSS(nsDependentSubstring& aString, uint32_t& aSecond)
+{
+  if (aString.Length() < 2) {
+    return false;
+  }
+
+  if (IsDigit(aString[0]) && IsDigit(aString[1])) {
+    nsDependentSubstring n(aString, 0, 2);
+    nsresult ec;
+    int32_t u = PromiseFlatString(n).ToInteger(&ec);
+    if (NS_FAILED(ec)) {
+      return false;
+    }
+
+    aString.Rebind(aString, 2);
+    if (u >= 60)
+      return false;
+
+    aSecond = u;
+    return true;
+  }
+
+  return false;
+}
+
+static bool ParseInteger(nsDependentSubstring& aString,
+                         int32_t& aResult)
+{
+  uint32_t index = FirstNonDigit(aString, 0);
+  if (index == 0) {
+    return false;
+  }
+
+  nsDependentSubstring n(aString, 0, index);
+  nsresult ec;
+  int32_t s = PromiseFlatString(n).ToInteger(&ec);
+  if (NS_FAILED(ec)) {
+    return false;
+  }
+
+  aString.Rebind(aString, index);
+  aResult = s;
+  return true;
+}
+
+static bool ParseCommaSeparator(nsDependentSubstring& aString)
+{
+  if (aString.Length() > 1 && aString[0] == ',') {
+    aString.Rebind(aString, 1);
+    return true;
+  }
+
+  return false;
+}
+
+bool nsMediaFragmentURIParser::ParseXYWH(nsDependentSubstring aString)
+{
+  int32_t x, y, w, h;
+  ClipUnit clipUnit;
+
+  // Determine units.
+  if (StringBeginsWith(aString, NS_LITERAL_STRING("pixel:"))) {
+    clipUnit = eClipUnit_Pixel;
+    aString.Rebind(aString, 6);
+  } else if (StringBeginsWith(aString, NS_LITERAL_STRING("percent:"))) {
+    clipUnit = eClipUnit_Percent;
+    aString.Rebind(aString, 8);
+  } else {
+    clipUnit = eClipUnit_Pixel;
+  }
+
+  // Read and validate coordinates.
+  if (ParseInteger(aString, x) && x >= 0 &&
+      ParseCommaSeparator(aString)       &&
+      ParseInteger(aString, y) && y >= 0 &&
+      ParseCommaSeparator(aString)       &&
+      ParseInteger(aString, w) && w > 0  &&
+      ParseCommaSeparator(aString)       &&
+      ParseInteger(aString, h) && h > 0  &&
+      aString.Length() == 0) {
+
+    // Reject invalid percentage coordinates.
+    if (clipUnit == eClipUnit_Percent &&
+        (x + w > 100 || y + h > 100)) {
+      return false;
+    }
+
+    mClip.emplace(x, y, w, h);
+    mClipUnit = clipUnit;
+    return true;
+  }
+
+  return false;
+}
+
+bool nsMediaFragmentURIParser::ParseMozSampleSize(nsDependentSubstring aString)
+{
+  int32_t sampleSize;
+
+  // Read and validate coordinates.
+  if (ParseInteger(aString, sampleSize) && sampleSize > 0) {
+    mSampleSize.emplace(sampleSize);
+    return true;
+  }
+
+  return false;
+}
+
+void nsMediaFragmentURIParser::Parse(nsACString& aRef)
+{
+  // Create an array of possibly-invalid media fragments.
+  nsTArray< std::pair<nsCString, nsCString> > fragments;
+  nsCCharSeparatedTokenizer tokenizer(aRef, '&');
+
+  while (tokenizer.hasMoreTokens()) {
+    const nsCSubstring& nv = tokenizer.nextToken();
+    int32_t index = nv.FindChar('=');
+    if (index >= 0) {
+      nsAutoCString name;
+      nsAutoCString value;
+      NS_UnescapeURL(StringHead(nv, index), esc_Ref | esc_AlwaysCopy, name);
+      NS_UnescapeURL(Substring(nv, index + 1, nv.Length()),
+                     esc_Ref | esc_AlwaysCopy, value);
+      fragments.AppendElement(make_pair(name, value));
+    }
+  }
+
+  // Parse the media fragment values.
+  bool gotTemporal = false, gotSpatial = false, gotSampleSize = false;
+  for (int i = fragments.Length() - 1 ; i >= 0 ; --i) {
+    if (gotTemporal && gotSpatial && gotSampleSize) {
+      // We've got one of each possible type. No need to look at the rest.
+      break;
+    } else if (!gotTemporal && fragments[i].first.EqualsLiteral("t")) {
+      nsAutoString value = NS_ConvertUTF8toUTF16(fragments[i].second);
+      gotTemporal = ParseNPT(nsDependentSubstring(value, 0));
+    } else if (!gotSpatial && fragments[i].first.EqualsLiteral("xywh")) {
+      nsAutoString value = NS_ConvertUTF8toUTF16(fragments[i].second);
+      gotSpatial = ParseXYWH(nsDependentSubstring(value, 0));
+    } else if (!gotSampleSize && fragments[i].first.EqualsLiteral("-moz-samplesize")) {
+      nsAutoString value = NS_ConvertUTF8toUTF16(fragments[i].second);
+      gotSampleSize = ParseMozSampleSize(nsDependentSubstring(value, 0));
+    }
+  }
+}
+
+} // namespace net
+} // namespace mozilla