1 files changed, 157 insertions, 0 deletions
diff --git a/dom/base/Text.cpp b/dom/base/Text.cpp
new file mode 100644
index 0000000000..a6cc317d4d
--- /dev/null
+++ b/dom/base/Text.cpp
@@ -0,0 +1,157 @@
+/* -*- 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 "mozilla/dom/Text.h"
+#include "nsTextNode.h"
+#include "mozAutoDocUpdate.h"
+
+namespace mozilla::dom {
+
+already_AddRefed<Text> Text::SplitText(uint32_t aOffset, ErrorResult& aRv) {
+  nsAutoString cutText;
+  const uint32_t length = TextLength();
+
+  if (aOffset > length) {
+    aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
+    return nullptr;
+  }
+
+  const uint32_t cutStartOffset = aOffset;
+  const uint32_t cutLength = length - aOffset;
+  SubstringData(cutStartOffset, cutLength, cutText, aRv);
+  if (aRv.Failed()) {
+    return nullptr;
+  }
+
+  Document* document = GetComposedDoc();
+  mozAutoDocUpdate updateBatch(document, true);
+
+  // Use Clone for creating the new node so that the new node is of same class
+  // as this node!
+  RefPtr<CharacterData> clone = CloneDataNode(mNodeInfo, false);
+  MOZ_ASSERT(clone && clone->IsText());
+  RefPtr<Text> newContent = static_cast<Text*>(clone.get());
+
+  // nsRange expects the CharacterDataChanged notification is followed
+  // by an insertion of |newContent|. If you change this code,
+  // make sure you make the appropriate changes in nsRange.
+  newContent->SetText(cutText, true);  // XXX should be false?
+
+  CharacterDataChangeInfo::Details details = {
+      CharacterDataChangeInfo::Details::eSplit, newContent};
+  nsresult rv =
+      SetTextInternal(cutStartOffset, cutLength, nullptr, 0, true, &details);
+  if (NS_FAILED(rv)) {
+    aRv.Throw(rv);
+    return nullptr;
+  }
+
+  nsCOMPtr<nsINode> parent = GetParentNode();
+  if (parent) {
+    nsCOMPtr<nsIContent> beforeNode = GetNextSibling();
+    parent->InsertChildBefore(newContent, beforeNode, true, IgnoreErrors());
+  }
+
+  return newContent.forget();
+}
+
+static Text* FirstLogicallyAdjacentTextNode(Text* aNode) {
+  do {
+    nsIContent* sibling = aNode->GetPreviousSibling();
+    if (!sibling || !sibling->IsText()) {
+      return aNode;
+    }
+    aNode = static_cast<Text*>(sibling);
+  } while (1);  // Must run out of previous siblings eventually!
+}
+
+static Text* LastLogicallyAdjacentTextNode(Text* aNode) {
+  do {
+    nsIContent* sibling = aNode->GetNextSibling();
+    if (!sibling || !sibling->IsText()) {
+      return aNode;
+    }
+
+    aNode = static_cast<Text*>(sibling);
+  } while (1);  // Must run out of next siblings eventually!
+}
+
+void Text::GetWholeText(nsAString& aWholeText) {
+  nsIContent* parent = GetParent();
+
+  // Handle parent-less nodes
+  if (!parent) {
+    GetData(aWholeText);
+    return;
+  }
+
+  Text* first = FirstLogicallyAdjacentTextNode(this);
+  Text* last = LastLogicallyAdjacentTextNode(this);
+
+  aWholeText.Truncate();
+
+  nsAutoString tmp;
+
+  while (true) {
+    first->GetData(tmp);
+    aWholeText.Append(tmp);
+
+    if (first == last) {
+      break;
+    }
+
+    nsIContent* next = first->GetNextSibling();
+    MOZ_ASSERT(next && next->IsText(),
+               "How did we run out of text before hitting `last`?");
+    first = static_cast<Text*>(next);
+  }
+}
+
+/* static */
+already_AddRefed<Text> Text::Constructor(const GlobalObject& aGlobal,
+                                         const nsAString& aData,
+                                         ErrorResult& aRv) {
+  nsCOMPtr<nsPIDOMWindowInner> window =
+      do_QueryInterface(aGlobal.GetAsSupports());
+  if (!window || !window->GetDoc()) {
+    aRv.Throw(NS_ERROR_FAILURE);
+    return nullptr;
+  }
+
+  return window->GetDoc()->CreateTextNode(aData);
+}
+
+bool Text::HasTextForTranslation() {
+  if (mText.Is2b()) {
+    // The fragment contains non-8bit characters which means there
+    // was at least one "interesting" character to trigger non-8bit.
+    return true;
+  }
+
+  if (HasFlag(NS_CACHED_TEXT_IS_ONLY_WHITESPACE) &&
+      HasFlag(NS_TEXT_IS_ONLY_WHITESPACE)) {
+    return false;
+  }
+
+  const char* cp = mText.Get1b();
+  const char* end = cp + mText.GetLength();
+
+  unsigned char ch;
+  for (; cp < end; cp++) {
+    ch = *cp;
+
+    // These are the characters that are letters
+    // in the first 256 UTF-8 codepoints.
+    if ((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') ||
+        (ch >= 192 && ch <= 214) || (ch >= 216 && ch <= 246) || (ch >= 248)) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+}  // namespace mozilla::dom