Adding upstream version 115.7.0esr.upstream/115.7.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 438 insertions, 0 deletions

diff --git a/editor/spellchecker/TextServicesDocument.h b/editor/spellchecker/TextServicesDocument.h
new file mode 100644
index 0000000000..7bc6aad7d5
--- /dev/null
+++ b/editor/spellchecker/TextServicesDocument.h
@@ -0,0 +1,438 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 mozilla_TextServicesDocument_h
+#define mozilla_TextServicesDocument_h
+
+#include "mozilla/Maybe.h"
+#include "mozilla/UniquePtr.h"
+#include "nsCOMPtr.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsIEditActionListener.h"
+#include "nsISupportsImpl.h"
+#include "nsStringFwd.h"
+#include "nsTArray.h"
+#include "nscore.h"
+
+class nsIContent;
+class nsIEditor;
+class nsINode;
+class nsISelectionController;
+class nsRange;
+
+namespace mozilla {
+
+class EditorBase;
+class FilteredContentIterator;
+class OffsetEntry;
+enum class JoinNodesDirection;  // Declared in HTMLEditHelpers.h
+
+namespace dom {
+class AbstractRange;
+class Document;
+class Element;
+class StaticRange;
+};  // namespace dom
+
+/**
+ * The TextServicesDocument presents the document in as a bunch of flattened
+ * text blocks. Each text block can be retrieved as an nsString.
+ */
+class TextServicesDocument final : public nsIEditActionListener {
+ private:
+  enum class IteratorStatus : uint8_t {
+    // No iterator (I), or iterator doesn't point to anything valid.
+    eDone = 0,
+    // I points to first text node (TN) in current block (CB).
+    eValid,
+    // No TN in CB, I points to first TN in prev block.
+    ePrev,
+    // No TN in CB, I points to first TN in next block.
+    eNext,
+  };
+
+  class OffsetEntryArray final : public nsTArray<UniquePtr<OffsetEntry>> {
+   public:
+    /**
+     * Init() initializes this array with aFilteredIter.
+     *
+     * @param[in]  aIterRange   Can be nullptr.
+     * @param[out] aAllTextInBlock
+     *                          Returns all text in the block.
+     */
+    Result<IteratorStatus, nsresult> Init(
+        FilteredContentIterator& aFilteredIter, IteratorStatus aIteratorStatus,
+        nsRange* aIterRange, nsAString* aAllTextInBlock = nullptr);
+
+    /**
+     * Returns index of first `OffsetEntry` which manages aTextNode.
+     */
+    Maybe<size_t> FirstIndexOf(const dom::Text& aTextNode) const;
+
+    /**
+     * FindWordRange() returns a word range starting from aStartPointToScan
+     * in aAllTextInBlock.
+     */
+    Result<EditorDOMRangeInTexts, nsresult> FindWordRange(
+        nsAString& aAllTextInBlock, const EditorRawDOMPoint& aStartPointToScan);
+
+    /**
+     * SplitElementAt() splits an `OffsetEntry` at aIndex if aOffsetInTextNode
+     * is middle of the range in the text node.
+     *
+     * @param aIndex    Index of the entry which you want to split.
+     * @param aOffsetInTextNode
+     *                  Offset in the text node.  I.e., the offset should be
+     *                  greater than 0 and less than `mLength`.
+     */
+    nsresult SplitElementAt(size_t aIndex, uint32_t aOffsetInTextNode);
+
+    /**
+     * Remove all `OffsetEntry` elements whose `mIsValid` is set to false.
+     */
+    void RemoveInvalidElements();
+
+    /**
+     * Called when non-collapsed selection will be deleted.
+     */
+    nsresult WillDeleteSelection();
+
+    /**
+     * Called when non-collapsed selection is deleteded.
+     */
+    OffsetEntry* DidDeleteSelection();
+
+    /**
+     * Called when aInsertedText is inserted.
+     */
+    MOZ_CAN_RUN_SCRIPT nsresult DidInsertText(dom::Selection* aSelection,
+                                              const nsAString& aInsertedString);
+
+    /**
+     * Called when selection range will be applied to the DOM Selection.
+     */
+    Result<EditorRawDOMRangeInTexts, nsresult> WillSetSelection(
+        uint32_t aOffsetInTextInBlock, uint32_t aLength);
+
+    class Selection final {
+     public:
+      size_t StartIndex() const {
+        MOZ_ASSERT(IsIndexesSet());
+        return *mStartIndex;
+      }
+      size_t EndIndex() const {
+        MOZ_ASSERT(IsIndexesSet());
+        return *mEndIndex;
+      }
+
+      uint32_t StartOffsetInTextInBlock() const {
+        MOZ_ASSERT(IsSet());
+        return *mStartOffsetInTextInBlock;
+      }
+      uint32_t EndOffsetInTextInBlock() const {
+        MOZ_ASSERT(IsSet());
+        return *mEndOffsetInTextInBlock;
+      }
+      uint32_t LengthInTextInBlock() const {
+        MOZ_ASSERT(IsSet());
+        return *mEndOffsetInTextInBlock - *mStartOffsetInTextInBlock;
+      }
+
+      bool IsCollapsed() {
+        return !IsSet() || (IsInSameElement() && StartOffsetInTextInBlock() ==
+                                                     EndOffsetInTextInBlock());
+      }
+
+      bool IsIndexesSet() const {
+        return mStartIndex.isSome() && mEndIndex.isSome();
+      }
+      bool IsSet() const {
+        return IsIndexesSet() && mStartOffsetInTextInBlock.isSome() &&
+               mEndOffsetInTextInBlock.isSome();
+      }
+      bool IsInSameElement() const {
+        return IsIndexesSet() && StartIndex() == EndIndex();
+      }
+
+      void Reset() {
+        mStartIndex.reset();
+        mEndIndex.reset();
+        mStartOffsetInTextInBlock.reset();
+        mEndOffsetInTextInBlock.reset();
+      }
+      void SetIndex(size_t aIndex) { mEndIndex = mStartIndex = Some(aIndex); }
+      void Set(size_t aIndex, uint32_t aOffsetInTextInBlock) {
+        mEndIndex = mStartIndex = Some(aIndex);
+        mStartOffsetInTextInBlock = mEndOffsetInTextInBlock =
+            Some(aOffsetInTextInBlock);
+      }
+      void SetIndexes(size_t aStartIndex, size_t aEndIndex) {
+        MOZ_DIAGNOSTIC_ASSERT(aStartIndex <= aEndIndex);
+        mStartIndex = Some(aStartIndex);
+        mEndIndex = Some(aEndIndex);
+      }
+      void Set(size_t aStartIndex, size_t aEndIndex,
+               uint32_t aStartOffsetInTextInBlock,
+               uint32_t aEndOffsetInTextInBlock) {
+        MOZ_DIAGNOSTIC_ASSERT(aStartIndex <= aEndIndex);
+        mStartIndex = Some(aStartIndex);
+        mEndIndex = Some(aEndIndex);
+        mStartOffsetInTextInBlock = Some(aStartOffsetInTextInBlock);
+        mEndOffsetInTextInBlock = Some(aEndOffsetInTextInBlock);
+      }
+
+      void CollapseToStart() {
+        MOZ_ASSERT(mStartIndex.isSome());
+        MOZ_ASSERT(mStartOffsetInTextInBlock.isSome());
+        mEndIndex = mStartIndex;
+        mEndOffsetInTextInBlock = mStartOffsetInTextInBlock;
+      }
+
+     private:
+      Maybe<size_t> mStartIndex;
+      Maybe<size_t> mEndIndex;
+      // Selected start and end offset in all text in a block element.
+      Maybe<uint32_t> mStartOffsetInTextInBlock;
+      Maybe<uint32_t> mEndOffsetInTextInBlock;
+    };
+    Selection mSelection;
+  };
+
+  RefPtr<dom::Document> mDocument;
+  nsCOMPtr<nsISelectionController> mSelCon;
+  RefPtr<EditorBase> mEditorBase;
+  RefPtr<FilteredContentIterator> mFilteredIter;
+  nsCOMPtr<nsIContent> mPrevTextBlock;
+  nsCOMPtr<nsIContent> mNextTextBlock;
+  OffsetEntryArray mOffsetTable;
+  RefPtr<nsRange> mExtent;
+
+  uint32_t mTxtSvcFilterType;
+  IteratorStatus mIteratorStatus;
+
+ protected:
+  virtual ~TextServicesDocument() = default;
+
+ public:
+  TextServicesDocument();
+
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_CLASS(TextServicesDocument)
+
+  /**
+   * Initializes the text services document to use a particular editor. The
+   * text services document will use the DOM document and presentation shell
+   * used by the editor.
+   *
+   * @param aEditor             The editor to use.
+   */
+  nsresult InitWithEditor(nsIEditor* aEditor);
+
+  /**
+   * Sets the range/extent over which the text services document will iterate.
+   * Note that InitWithEditor() should have been called prior to calling this
+   * method.  If this method is never called, the text services defaults to
+   * iterating over the entire document.
+   *
+   * @param aAbstractRange      The range to use. aAbstractRange must point to a
+   *                            valid range object.
+   */
+  nsresult SetExtent(const dom::AbstractRange* aAbstractRange);
+
+  /**
+   * Expands the end points of the range so that it spans complete words.  This
+   * call does not change any internal state of the text services document.
+   *
+   * @param aStaticRange        [in/out] The range to be expanded/adjusted.
+   */
+  nsresult ExpandRangeToWordBoundaries(dom::StaticRange* aStaticRange);
+
+  /**
+   * Sets the filter type to be used while iterating over content.
+   * This will clear the current filter type if it's not either
+   * FILTERTYPE_NORMAL or FILTERTYPE_MAIL.
+   *
+   * @param aFilterType         The filter type to be used while iterating over
+   *                            content.
+   */
+  nsresult SetFilterType(uint32_t aFilterType);
+
+  /**
+   * Returns the text in the current text block.
+   *
+   * @param aStr                [OUT] This will contain the text.
+   */
+  nsresult GetCurrentTextBlock(nsAString& aStr);
+
+  /**
+   * Tells the document to point to the first text block in the document.  This
+   * method does not adjust the current cursor position or selection.
+   */
+  nsresult FirstBlock();
+
+  enum class BlockSelectionStatus {
+    // There is no text block (TB) in or before the selection (S).
+    eBlockNotFound = 0,
+    // No TB in S, but found one before/after S.
+    eBlockOutside,
+    // S extends beyond the start and end of TB.
+    eBlockInside,
+    // TB contains entire S.
+    eBlockContains,
+    // S begins or ends in TB but extends outside of TB.
+    eBlockPartial,
+  };
+
+  /**
+   * Tells the document to point to the last text block that contains the
+   * current selection or caret.
+   *
+   * @param aSelectionStatus    [OUT] This will contain the text block
+   *                            selection status.
+   * @param aSelectionOffset    [OUT] This will contain the offset into the
+   *                            string returned by GetCurrentTextBlock() where
+   *                            the selection begins.
+   * @param aLength             [OUT] This will contain the number of
+   *                            characters that are selected in the string.
+   */
+  MOZ_CAN_RUN_SCRIPT
+  nsresult LastSelectedBlock(BlockSelectionStatus* aSelStatus,
+                             uint32_t* aSelOffset, uint32_t* aSelLength);
+
+  /**
+   * Tells the document to point to the text block before the current one.
+   * This method will return NS_OK, even if there is no previous block.
+   * Callers should call IsDone() to check if we have gone beyond the first
+   * text block in the document.
+   */
+  nsresult PrevBlock();
+
+  /**
+   * Tells the document to point to the text block after the current one.
+   * This method will return NS_OK, even if there is no next block. Callers
+   * should call IsDone() to check if we have gone beyond the last text block
+   * in the document.
+   */
+  nsresult NextBlock();
+
+  /**
+   * IsDone() will always set aIsDone == false unless the document contains
+   * no text, PrevBlock() was called while the document was already pointing
+   * to the first text block in the document, or NextBlock() was called while
+   * the document was already pointing to the last text block in the document.
+   *
+   * @param aIsDone             [OUT] This will contain the result.
+   */
+  nsresult IsDone(bool* aIsDone);
+
+  /**
+   * SetSelection() allows the caller to set the selection based on an offset
+   * into the string returned by GetCurrentTextBlock().  A length of zero
+   * places the cursor at that offset. A positive non-zero length "n" selects
+   * n characters in the string.
+   *
+   * @param aOffset             Offset into string returned by
+   *                            GetCurrentTextBlock().
+   * @param aLength             Number of characters selected.
+   */
+  MOZ_CAN_RUN_SCRIPT nsresult SetSelection(uint32_t aOffset, uint32_t aLength);
+
+  /**
+   * Scrolls the document so that the current selection is visible.
+   */
+  nsresult ScrollSelectionIntoView();
+
+  /**
+   * Deletes the text selected by SetSelection(). Calling DeleteSelection()
+   * with nothing selected, or with a collapsed selection (cursor) does
+   * nothing and returns NS_OK.
+   */
+  MOZ_CAN_RUN_SCRIPT
+  nsresult DeleteSelection();
+
+  /**
+   * Inserts the given text at the current cursor position.  If there is a
+   * selection, it will be deleted before the text is inserted.
+   */
+  MOZ_CAN_RUN_SCRIPT
+  nsresult InsertText(const nsAString& aText);
+
+  /**
+   * nsIEditActionListener method implementations.
+   */
+  NS_DECL_NSIEDITACTIONLISTENER
+
+  /**
+   * Actual edit action listeners.  When you add new method here for listening
+   * to new edit action, you need to make it called by EditorBase.
+   * Additionally, you need to call it from proper method of
+   * nsIEditActionListener too because if this is created not for inline
+   * spell checker of the editor, edit actions will be notified via
+   * nsIEditActionListener (slow path, though).
+   */
+  void DidDeleteContent(const nsIContent& aChildContent);
+  void DidJoinContents(const EditorRawDOMPoint& aJoinedPoint,
+                       const nsIContent& aRemovedContent,
+                       JoinNodesDirection aJoinNodesDirection);
+
+ private:
+  // TODO: We should get rid of this method since `aAbstractRange` has
+  //       enough simple API to get them.
+  static nsresult GetRangeEndPoints(const dom::AbstractRange* aAbstractRange,
+                                    nsINode** aStartContainer,
+                                    uint32_t* aStartOffset,
+                                    nsINode** aEndContainer,
+                                    uint32_t* aEndOffset);
+
+  nsresult CreateFilteredContentIterator(
+      const dom::AbstractRange* aAbstractRange,
+      FilteredContentIterator** aFilteredIter);
+
+  dom::Element* GetDocumentContentRootNode() const;
+  already_AddRefed<nsRange> CreateDocumentContentRange();
+  already_AddRefed<nsRange> CreateDocumentContentRootToNodeOffsetRange(
+      nsINode* aParent, uint32_t aOffset, bool aToStart);
+  nsresult CreateDocumentContentIterator(
+      FilteredContentIterator** aFilteredIter);
+
+  nsresult AdjustContentIterator();
+
+  static nsresult FirstTextNode(FilteredContentIterator* aFilteredIter,
+                                IteratorStatus* aIteratorStatus);
+  static nsresult LastTextNode(FilteredContentIterator* aFilteredIter,
+                               IteratorStatus* aIteratorStatus);
+
+  static nsresult FirstTextNodeInCurrentBlock(
+      FilteredContentIterator* aFilteredIter);
+  static nsresult FirstTextNodeInPrevBlock(
+      FilteredContentIterator* aFilteredIter);
+  static nsresult FirstTextNodeInNextBlock(
+      FilteredContentIterator* aFilteredIter);
+
+  nsresult GetFirstTextNodeInPrevBlock(nsIContent** aContent);
+  nsresult GetFirstTextNodeInNextBlock(nsIContent** aContent);
+
+  static bool DidSkip(FilteredContentIterator* aFilteredIter);
+  static void ClearDidSkip(FilteredContentIterator* aFilteredIter);
+
+  static bool HasSameBlockNodeParent(dom::Text& aTextNode1,
+                                     dom::Text& aTextNode2);
+
+  MOZ_CAN_RUN_SCRIPT nsresult SetSelectionInternal(uint32_t aOffset,
+                                                   uint32_t aLength,
+                                                   bool aDoUpdate);
+  MOZ_CAN_RUN_SCRIPT nsresult GetSelection(BlockSelectionStatus* aSelStatus,
+                                           uint32_t* aSelOffset,
+                                           uint32_t* aSelLength);
+  MOZ_CAN_RUN_SCRIPT nsresult
+  GetCollapsedSelection(BlockSelectionStatus* aSelStatus, uint32_t* aSelOffset,
+                        uint32_t* aSelLength);
+  nsresult GetUncollapsedSelection(BlockSelectionStatus* aSelStatus,
+                                   uint32_t* aSelOffset, uint32_t* aSelLength);
+};
+
+}  // namespace mozilla
+
+#endif  // #ifndef mozilla_TextServicesDocument_h