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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /dom/base/WindowFeatures.cpp | |
parent | Initial commit. (diff) | |
download | thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'dom/base/WindowFeatures.cpp')
-rw-r--r-- | dom/base/WindowFeatures.cpp | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/dom/base/WindowFeatures.cpp b/dom/base/WindowFeatures.cpp new file mode 100644 index 0000000000..5de62f8b59 --- /dev/null +++ b/dom/base/WindowFeatures.cpp @@ -0,0 +1,241 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* 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 "WindowFeatures.h" + +#include "nsINode.h" // IsSpaceCharacter +#include "nsContentUtils.h" // nsContentUtils +#include "nsDependentSubstring.h" // Substring +#include "nsReadableUtils.h" // ToLowerCase + +using mozilla::dom::IsSpaceCharacter; +using mozilla::dom::WindowFeatures; + +#ifdef DEBUG +/* static */ +bool WindowFeatures::IsLowerCase(const char* text) { + nsAutoCString before(text); + nsAutoCString after; + ToLowerCase(before, after); + return before == after; +} +#endif + +static bool IsFeatureSeparator(char aChar) { + // https://html.spec.whatwg.org/multipage/window-object.html#feature-separator + // A code point is a feature separator if it is ASCII whitespace, U+003D (=), + // or U+002C (,). + return IsSpaceCharacter(aChar) || aChar == '=' || aChar == ','; +} + +template <class IterT, class CondT> +void AdvanceWhile(IterT& aPosition, const IterT& aEnd, CondT aCondition) { + // https://infra.spec.whatwg.org/#collect-a-sequence-of-code-points + // + // Step 2. While `position` doesn’t point past the end of `input` and the + // code point at `position` within `input` meets the condition condition: + while (aCondition(*aPosition) && aPosition < aEnd) { + // Step 2.1. Append that code point to the end of `result`. + // (done by caller) + + // Step 2.2. Advance `position` by 1. + ++aPosition; + } +} + +template <class IterT, class CondT> +nsTDependentSubstring<char> CollectSequence(IterT& aPosition, const IterT& aEnd, + CondT aCondition) { + // https://infra.spec.whatwg.org/#collect-a-sequence-of-code-points + // To collect a sequence of code points meeting a condition `condition` from + // a string `input`, given a position variable `position` tracking the + // position of the calling algorithm within `input`: + + // Step 1. Let `result` be the empty string. + auto start = aPosition; + + // Step 2. + AdvanceWhile(aPosition, aEnd, aCondition); + + // Step 3. Return `result`. + return Substring(start, aPosition); +} + +static void NormalizeName(nsAutoCString& aName) { + // https://html.spec.whatwg.org/multipage/window-object.html#normalizing-the-feature-name + if (aName == "screenx") { + aName = "left"; + } else if (aName == "screeny") { + aName = "top"; + } else if (aName == "innerwidth") { + aName = "width"; + } else if (aName == "innerheight") { + aName = "height"; + } +} + +/* static */ +int32_t WindowFeatures::ParseIntegerWithFallback(const nsCString& aValue) { + // https://html.spec.whatwg.org/multipage/window-object.html#concept-window-open-features-parse-boolean + // + // Step 3. Let `parsed` be the result of parsing value as an integer. + nsContentUtils::ParseHTMLIntegerResultFlags parseResult; + int32_t parsed = nsContentUtils::ParseHTMLInteger(aValue, &parseResult); + + // Step 4. If `parsed` is an error, then set it to 0. + // + // https://html.spec.whatwg.org/multipage/common-microsyntaxes.html#rules-for-parsing-integers + // + // eParseHTMLInteger_NonStandard is not tested given: + // * Step 4 allows leading whitespaces + // * Step 6 allows a plus sign + // * Step 8 does not disallow leading zeros + // * Steps 6 and 9 allow `-0` + // + // eParseHTMLInteger_DidNotConsumeAllInput is not tested given: + // * Step 8 collects digits and ignores remaining part + // + if (parseResult & nsContentUtils::eParseHTMLInteger_Error) { + parsed = 0; + } + + return parsed; +} + +/* static */ +bool WindowFeatures::ParseBool(const nsCString& aValue) { + // https://html.spec.whatwg.org/multipage/window-object.html#concept-window-open-features-parse-boolean + // To parse a boolean feature given a string `value`: + + // Step 1. If `value` is the empty string, then return true. + if (aValue.IsEmpty()) { + return true; + } + + // Step 2. If `value` is "yes", then return true. + if (aValue == "yes") { + return true; + } + + // Step 3. If `value` is "true", then return + if (aValue == "true") { + return true; + } + + // Steps 4-5. + int32_t parsed = ParseIntegerWithFallback(aValue); + + // Step 6. Return false if `parsed` is 0, and true otherwise. + return parsed != 0; +} + +bool WindowFeatures::Tokenize(const nsACString& aFeatures) { + // https://html.spec.whatwg.org/multipage/window-object.html#concept-window-open-features-tokenize + // To tokenize the `features` argument: + + // Step 1. Let `tokenizedFeatures` be a new ordered map. + // (implicit) + + // Step 2. Let `position` point at the first code point of features. + auto position = aFeatures.BeginReading(); + + // Step 3. While `position` is not past the end of `features`: + auto end = aFeatures.EndReading(); + while (position < end) { + // Step 3.1. Let `name` be the empty string. + // (implicit) + + // Step 3.2. Let `value` be the empty string. + nsAutoCString value; + + // Step 3.3. Collect a sequence of code points that are feature separators + // from `features` given `position`. This skips past leading separators + // before the name. + // + // NOTE: Do not collect given this value is unused. + AdvanceWhile(position, end, IsFeatureSeparator); + + // Step 3.4. Collect a sequence of code points that are not feature + // separators from `features` given `position`. Set `name` to the collected + // characters, converted to ASCII lowercase. + nsAutoCString name(CollectSequence( + position, end, [](char c) { return !IsFeatureSeparator(c); })); + ToLowerCase(name); + + // Step 3.5. Set `name` to the result of normalizing the feature name + // `name`. + NormalizeName(name); + + // Step 3.6. While `position` is not past the end of `features` and the + // code point at `position` in features is not U+003D (=): + // + // Step 3.6.1. If the code point at `position` in features is U+002C (,), + // or if it is not a feature separator, then break. + // + // Step 3.6.2. Advance `position` by 1. + // + // NOTE: This skips to the first U+003D (=) but does not skip past a U+002C + // (,) or a non-separator. + // + // The above means skip all whitespaces. + AdvanceWhile(position, end, [](char c) { return IsSpaceCharacter(c); }); + + // Step 3.7. If the code point at `position` in `features` is a feature + // separator: + if (position < end && IsFeatureSeparator(*position)) { + // Step 3.7.1. While `position` is not past the end of `features` and the + // code point at `position` in `features` is a feature separator: + // + // Step 3.7.1.1. If the code point at `position` in `features` is + // U+002C (,), then break. + // + // Step 3.7.1.2. Advance `position` by 1. + // + // NOTE: This skips to the first non-separator but does not skip past a + // U+002C (,). + AdvanceWhile(position, end, + [](char c) { return IsFeatureSeparator(c) && c != ','; }); + + // Step 3.7.2. Collect a sequence of code points that are not feature + // separators code points from `features` given `position`. Set `value` to + // the collected code points, converted to ASCII lowercase. + value = CollectSequence(position, end, + [](char c) { return !IsFeatureSeparator(c); }); + ToLowerCase(value); + } + + // Step 3.8. If `name` is not the empty string, then set + // `tokenizedFeatures[name]` to `value`. + if (!name.IsEmpty()) { + if (!tokenizedFeatures_.put(name, value)) { + return false; + } + } + } + + // Step 4. Return `tokenizedFeatures`. + return true; +} + +void WindowFeatures::Stringify(nsAutoCString& aOutput) { + MOZ_ASSERT(aOutput.IsEmpty()); + + for (auto r = tokenizedFeatures_.all(); !r.empty(); r.popFront()) { + if (!aOutput.IsEmpty()) { + aOutput.Append(','); + } + + const nsCString& name = r.front().key(); + const nsCString& value = r.front().value(); + + aOutput.Append(name); + + if (!value.IsEmpty()) { + aOutput.Append('='); + aOutput.Append(value); + } + } +} |