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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /netwerk/base/nsMediaFragmentURIParser.cpp
parentInitial commit. (diff)
downloadfirefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz
firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'netwerk/base/nsMediaFragmentURIParser.cpp')
-rw-r--r--netwerk/base/nsMediaFragmentURIParser.cpp354
1 files changed, 354 insertions, 0 deletions
diff --git a/netwerk/base/nsMediaFragmentURIParser.cpp b/netwerk/base/nsMediaFragmentURIParser.cpp
new file mode 100644
index 0000000000..bfa82530c6
--- /dev/null
+++ b/netwerk/base/nsMediaFragmentURIParser.cpp
@@ -0,0 +1,354 @@
+/* -*- 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::make_pair;
+using std::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 = 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 = 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 = 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 = 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, u"pixel:"_ns)) {
+ clipUnit = eClipUnit_Pixel;
+ aString.Rebind(aString, 6);
+ } else if (StringBeginsWith(aString, u"percent:"_ns)) {
+ 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;
+}
+
+void nsMediaFragmentURIParser::Parse(nsACString& aRef) {
+ // Create an array of possibly-invalid media fragments.
+ nsTArray<std::pair<nsCString, nsCString> > fragments;
+
+ for (const nsACString& nv : nsCCharSeparatedTokenizer(aRef, '&').ToRange()) {
+ 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;
+ for (int i = fragments.Length() - 1; i >= 0; --i) {
+ if (gotTemporal && gotSpatial) {
+ // We've got one of each possible type. No need to look at the rest.
+ break;
+ }
+ 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));
+ }
+ }
+}
+
+} // namespace net
+} // namespace mozilla