From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Fri, 19 Apr 2024 02:47:55 +0200
Subject: Adding upstream version 124.0.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 parser/html/nsHtml5TokenizerLoopPolicies.h | 123 +++++++++++++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100644 parser/html/nsHtml5TokenizerLoopPolicies.h

(limited to 'parser/html/nsHtml5TokenizerLoopPolicies.h')

diff --git a/parser/html/nsHtml5TokenizerLoopPolicies.h b/parser/html/nsHtml5TokenizerLoopPolicies.h
new file mode 100644
index 0000000000..973b591c03
--- /dev/null
+++ b/parser/html/nsHtml5TokenizerLoopPolicies.h
@@ -0,0 +1,123 @@
+/* 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/. */
+
+#ifndef nsHtml5TokenizerLoopPolicies_h
+#define nsHtml5TokenizerLoopPolicies_h
+
+/**
+ * This policy does not report tokenizer transitions anywhere and does not
+ * track line and column numbers. To be used for innerHTML.
+ */
+struct nsHtml5FastestPolicy {
+  static const bool reportErrors = false;
+  static int32_t transition(nsHtml5Highlighter* aHighlighter, int32_t aState,
+                            bool aReconsume, int32_t aPos) {
+    return aState;
+  }
+  static void completedNamedCharacterReference(
+      nsHtml5Highlighter* aHighlighter) {}
+
+  static char16_t checkChar(nsHtml5Tokenizer* aTokenizer, char16_t* buf,
+                            int32_t pos) {
+    return buf[pos];
+  }
+
+  static void silentCarriageReturn(nsHtml5Tokenizer* aTokenizer) {
+    aTokenizer->lastCR = true;
+  }
+
+  static void silentLineFeed(nsHtml5Tokenizer* aTokenizer) {}
+};
+
+/**
+ * This policy does not report tokenizer transitions anywhere. To be used
+ * when _not_ viewing source and when not parsing innerHTML (or other
+ * script execution-preventing fragment).
+ */
+struct nsHtml5LineColPolicy {
+  static const bool reportErrors = false;
+  static int32_t transition(nsHtml5Highlighter* aHighlighter, int32_t aState,
+                            bool aReconsume, int32_t aPos) {
+    return aState;
+  }
+  static void completedNamedCharacterReference(
+      nsHtml5Highlighter* aHighlighter) {}
+
+  static char16_t checkChar(nsHtml5Tokenizer* aTokenizer, char16_t* buf,
+                            int32_t pos) {
+    // The name of this method comes from the validator.
+    // We aren't checking a char here. We read the next
+    // UTF-16 code unit and, before returning it, adjust
+    // the line and column numbers.
+    char16_t c = buf[pos];
+    if (MOZ_UNLIKELY(aTokenizer->nextCharOnNewLine)) {
+      // By changing the line and column here instead
+      // of doing so eagerly when seeing the line break
+      // causes the line break itself to be considered
+      // column-wise at the end of a line.
+      aTokenizer->line++;
+      aTokenizer->col = 1;
+      aTokenizer->nextCharOnNewLine = false;
+    } else if (MOZ_LIKELY(!NS_IS_LOW_SURROGATE(c))) {
+      // SpiderMonkey wants to count scalar values
+      // instead of UTF-16 code units. We omit low
+      // surrogates from the count so that only the
+      // high surrogate increments the count for
+      // two-code-unit scalar values.
+      //
+      // It's somewhat questionable from the performance
+      // perspective to make the human-perceivable column
+      // count correct for non-BMP characters in the case
+      // where there is a single scalar value per extended
+      // grapheme cluster when even on the BMP there are
+      // various cases where the scalar count doesn't make
+      // much sense as a human-perceived "column count" due
+      // to extended grapheme clusters consisting of more
+      // than one scalar value.
+      aTokenizer->col++;
+    }
+    return c;
+  }
+
+  static void silentCarriageReturn(nsHtml5Tokenizer* aTokenizer) {
+    aTokenizer->nextCharOnNewLine = true;
+    aTokenizer->lastCR = true;
+  }
+
+  static void silentLineFeed(nsHtml5Tokenizer* aTokenizer) {
+    aTokenizer->nextCharOnNewLine = true;
+  }
+};
+
+/**
+ * This policy reports the tokenizer transitions to a highlighter. To be used
+ * when viewing source.
+ */
+struct nsHtml5ViewSourcePolicy {
+  static const bool reportErrors = true;
+  static int32_t transition(nsHtml5Highlighter* aHighlighter, int32_t aState,
+                            bool aReconsume, int32_t aPos) {
+    return aHighlighter->Transition(aState, aReconsume, aPos);
+  }
+  static void completedNamedCharacterReference(
+      nsHtml5Highlighter* aHighlighter) {
+    aHighlighter->CompletedNamedCharacterReference();
+  }
+
+  static char16_t checkChar(nsHtml5Tokenizer* aTokenizer, char16_t* buf,
+                            int32_t pos) {
+    return buf[pos];
+  }
+
+  static void silentCarriageReturn(nsHtml5Tokenizer* aTokenizer) {
+    aTokenizer->line++;
+    aTokenizer->lastCR = true;
+  }
+
+  static void silentLineFeed(nsHtml5Tokenizer* aTokenizer) {
+    aTokenizer->line++;
+  }
+};
+
+#endif  // nsHtml5TokenizerLoopPolicies_h
-- 
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