Adding upstream version 86.0.1.upstream/86.0.1upstream

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

1 files changed, 390 insertions, 0 deletions

diff --git a/editor/libeditor/CompositionTransaction.cpp b/editor/libeditor/CompositionTransaction.cpp
new file mode 100644
index 0000000000..136718201a
--- /dev/null
+++ b/editor/libeditor/CompositionTransaction.cpp
@@ -0,0 +1,390 @@
+/* -*- 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/. */
+
+#include "CompositionTransaction.h"
+
+#include "mozilla/EditorBase.h"       // mEditorBase
+#include "mozilla/SelectionState.h"   // RangeUpdater
+#include "mozilla/TextComposition.h"  // TextComposition
+#include "mozilla/dom/Selection.h"    // local var
+#include "mozilla/dom/Text.h"         // mTextNode
+#include "nsAString.h"                // params
+#include "nsDebug.h"                  // for NS_ASSERTION, etc
+#include "nsError.h"                  // for NS_SUCCEEDED, NS_FAILED, etc
+#include "nsRange.h"                  // local var
+#include "nsISelectionController.h"   // for nsISelectionController constants
+#include "nsQueryObject.h"            // for do_QueryObject
+
+namespace mozilla {
+
+using namespace dom;
+
+// static
+already_AddRefed<CompositionTransaction> CompositionTransaction::Create(
+    EditorBase& aEditorBase, const nsAString& aStringToInsert,
+    const EditorDOMPointInText& aPointToInsert) {
+  MOZ_ASSERT(aPointToInsert.IsSetAndValid());
+
+  TextComposition* composition = aEditorBase.GetComposition();
+  MOZ_RELEASE_ASSERT(composition);
+  // XXX Actually, we get different text node and offset from editor in some
+  //     cases.  If composition stores text node, we should use it and offset
+  //     in it.
+  EditorDOMPointInText pointToInsert;
+  if (Text* textNode = composition->GetContainerTextNode()) {
+    pointToInsert.Set(textNode, composition->XPOffsetInTextNode());
+    NS_WARNING_ASSERTION(
+        pointToInsert.GetContainerAsText() ==
+            composition->GetContainerTextNode(),
+        "The editor tries to insert composition string into different node");
+    NS_WARNING_ASSERTION(
+        pointToInsert.Offset() == composition->XPOffsetInTextNode(),
+        "The editor tries to insert composition string into different offset");
+  } else {
+    pointToInsert = aPointToInsert;
+  }
+  RefPtr<CompositionTransaction> transaction =
+      new CompositionTransaction(aEditorBase, aStringToInsert, pointToInsert);
+  // XXX Now, it might be better to modify the text node information of
+  //     the TextComposition instance in DoTransaction() because updating
+  //     the information before changing actual DOM tree is pretty odd.
+  composition->OnCreateCompositionTransaction(
+      aStringToInsert, pointToInsert.ContainerAsText(), pointToInsert.Offset());
+  return transaction.forget();
+}
+
+CompositionTransaction::CompositionTransaction(
+    EditorBase& aEditorBase, const nsAString& aStringToInsert,
+    const EditorDOMPointInText& aPointToInsert)
+    : mTextNode(aPointToInsert.ContainerAsText()),
+      mOffset(aPointToInsert.Offset()),
+      mReplaceLength(aEditorBase.GetComposition()->XPLengthInTextNode()),
+      mRanges(aEditorBase.GetComposition()->GetRanges()),
+      mStringToInsert(aStringToInsert),
+      mEditorBase(&aEditorBase),
+      mFixed(false) {
+  MOZ_ASSERT(mTextNode->TextLength() >= mOffset);
+}
+
+NS_IMPL_CYCLE_COLLECTION_INHERITED(CompositionTransaction, EditTransactionBase,
+                                   mEditorBase, mTextNode)
+// mRangeList can't lead to cycles
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(CompositionTransaction)
+NS_INTERFACE_MAP_END_INHERITING(EditTransactionBase)
+NS_IMPL_ADDREF_INHERITED(CompositionTransaction, EditTransactionBase)
+NS_IMPL_RELEASE_INHERITED(CompositionTransaction, EditTransactionBase)
+
+NS_IMETHODIMP CompositionTransaction::DoTransaction() {
+  if (NS_WARN_IF(!mEditorBase) || NS_WARN_IF(!mTextNode)) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  // Fail before making any changes if there's no selection controller
+  if (NS_WARN_IF(!mEditorBase->GetSelectionController())) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  OwningNonNull<EditorBase> editorBase = *mEditorBase;
+  OwningNonNull<Text> textNode = *mTextNode;
+
+  // Advance caret: This requires the presentation shell to get the selection.
+  if (mReplaceLength == 0) {
+    ErrorResult error;
+    editorBase->DoInsertText(textNode, mOffset, mStringToInsert, error);
+    if (error.Failed()) {
+      NS_WARNING("EditorBase::DoInsertText() failed");
+      return error.StealNSResult();
+    }
+    editorBase->RangeUpdaterRef().SelAdjInsertText(textNode, mOffset,
+                                                   mStringToInsert.Length());
+  } else {
+    // If composition string is split to multiple text nodes, we should put
+    // whole new composition string to the first text node and remove the
+    // compostion string in other nodes.
+    uint32_t replaceableLength = textNode->TextLength() - mOffset;
+    ErrorResult error;
+    editorBase->DoReplaceText(textNode, mOffset, mReplaceLength,
+                              mStringToInsert, error);
+    if (error.Failed()) {
+      NS_WARNING("EditorBase::DoReplaceText() failed");
+      return error.StealNSResult();
+    }
+
+    // Don't use RangeUpdaterRef().SelAdjReplaceText() here because undoing
+    // this transaction will remove whole composition string.  Therefore,
+    // selection should be restored at start of composition string.
+    // XXX Perhaps, this is a bug of our selection managemnt at undoing.
+    editorBase->RangeUpdaterRef().SelAdjDeleteText(textNode, mOffset,
+                                                   replaceableLength);
+    // But some ranges which after the composition string should be restored
+    // as-is.
+    editorBase->RangeUpdaterRef().SelAdjInsertText(textNode, mOffset,
+                                                   mStringToInsert.Length());
+
+    if (replaceableLength < mReplaceLength) {
+      // XXX Perhaps, scanning following sibling text nodes with composition
+      //     string length which we know is wrong because there may be
+      //     non-empty text nodes which are inserted by JS.  Instead, we
+      //     should remove all text in the ranges of IME selections.
+      int32_t remainLength = mReplaceLength - replaceableLength;
+      IgnoredErrorResult ignoredError;
+      for (nsIContent* nextSibling = textNode->GetNextSibling();
+           nextSibling && nextSibling->IsText() && remainLength;
+           nextSibling = nextSibling->GetNextSibling()) {
+        OwningNonNull<Text> followingTextNode =
+            *static_cast<Text*>(nextSibling);
+        uint32_t textLength = followingTextNode->TextLength();
+        editorBase->DoDeleteText(followingTextNode, 0, remainLength,
+                                 ignoredError);
+        NS_WARNING_ASSERTION(!ignoredError.Failed(),
+                             "EditorBase::DoDeleteText() failed, but ignored");
+        ignoredError.SuppressException();
+        // XXX Needs to check whether the text is deleted as expected.
+        editorBase->RangeUpdaterRef().SelAdjDeleteText(followingTextNode, 0,
+                                                       remainLength);
+        remainLength -= textLength;
+      }
+    }
+  }
+
+  nsresult rv = SetSelectionForRanges();
+  NS_WARNING_ASSERTION(
+      NS_SUCCEEDED(rv),
+      "CompositionTransaction::SetSelectionForRanges() failed");
+  return rv;
+}
+
+NS_IMETHODIMP CompositionTransaction::UndoTransaction() {
+  if (NS_WARN_IF(!mEditorBase) || NS_WARN_IF(!mTextNode)) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  // Get the selection first so we'll fail before making any changes if we
+  // can't get it
+  RefPtr<Selection> selection = mEditorBase->GetSelection();
+  if (NS_WARN_IF(!selection)) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  OwningNonNull<EditorBase> editorBase = *mEditorBase;
+  OwningNonNull<Text> textNode = *mTextNode;
+  ErrorResult error;
+  editorBase->DoDeleteText(textNode, mOffset, mStringToInsert.Length(), error);
+  if (error.Failed()) {
+    NS_WARNING("EditorBase::DoDeleteText() failed");
+    return error.StealNSResult();
+  }
+
+  // set the selection to the insertion point where the string was removed
+  nsresult rv = selection->CollapseInLimiter(textNode, mOffset);
+  NS_ASSERTION(NS_SUCCEEDED(rv), "Selection::CollapseInLimiter() failed");
+  return rv;
+}
+
+NS_IMETHODIMP CompositionTransaction::Merge(nsITransaction* aOtherTransaction,
+                                            bool* aDidMerge) {
+  if (NS_WARN_IF(!aOtherTransaction) || NS_WARN_IF(!aDidMerge)) {
+    return NS_ERROR_INVALID_ARG;
+  }
+  *aDidMerge = false;
+
+  // Check to make sure we aren't fixed, if we are then nothing gets merged.
+  if (mFixed) {
+    return NS_OK;
+  }
+
+  RefPtr<EditTransactionBase> otherTransactionBase =
+      aOtherTransaction->GetAsEditTransactionBase();
+  if (!otherTransactionBase) {
+    return NS_OK;
+  }
+
+  // If aTransaction is another CompositionTransaction then merge it
+  CompositionTransaction* otherCompositionTransaction =
+      otherTransactionBase->GetAsCompositionTransaction();
+  if (!otherCompositionTransaction) {
+    return NS_OK;
+  }
+
+  // We merge the next IME transaction by adopting its insert string.
+  mStringToInsert = otherCompositionTransaction->mStringToInsert;
+  mRanges = otherCompositionTransaction->mRanges;
+  *aDidMerge = true;
+  return NS_OK;
+}
+
+void CompositionTransaction::MarkFixed() { mFixed = true; }
+
+/* ============ private methods ================== */
+
+nsresult CompositionTransaction::SetSelectionForRanges() {
+  if (NS_WARN_IF(!mEditorBase) || NS_WARN_IF(!mTextNode)) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+  OwningNonNull<EditorBase> editorBase = *mEditorBase;
+  OwningNonNull<Text> textNode = *mTextNode;
+  RefPtr<TextRangeArray> ranges = mRanges;
+  nsresult rv = SetIMESelection(editorBase, textNode, mOffset,
+                                mStringToInsert.Length(), ranges);
+  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
+                       "CompositionTransaction::SetIMESelection() failed");
+  return rv;
+}
+
+// static
+nsresult CompositionTransaction::SetIMESelection(
+    EditorBase& aEditorBase, Text* aTextNode, uint32_t aOffsetInNode,
+    uint32_t aLengthOfCompositionString, const TextRangeArray* aRanges) {
+  RefPtr<Selection> selection = aEditorBase.GetSelection();
+  if (NS_WARN_IF(!selection)) {
+    return NS_ERROR_NOT_INITIALIZED;
+  }
+
+  SelectionBatcher selectionBatcher(selection);
+
+  // First, remove all selections of IME composition.
+  static const RawSelectionType kIMESelections[] = {
+      nsISelectionController::SELECTION_IME_RAWINPUT,
+      nsISelectionController::SELECTION_IME_SELECTEDRAWTEXT,
+      nsISelectionController::SELECTION_IME_CONVERTEDTEXT,
+      nsISelectionController::SELECTION_IME_SELECTEDCONVERTEDTEXT};
+
+  nsCOMPtr<nsISelectionController> selectionController =
+      aEditorBase.GetSelectionController();
+  if (NS_WARN_IF(!selectionController)) {
+    return NS_ERROR_NOT_INITIALIZED;
+  }
+
+  IgnoredErrorResult ignoredError;
+  for (uint32_t i = 0; i < ArrayLength(kIMESelections); ++i) {
+    RefPtr<Selection> selectionOfIME =
+        selectionController->GetSelection(kIMESelections[i]);
+    if (!selectionOfIME) {
+      NS_WARNING("nsISelectionController::GetSelection() failed");
+      continue;
+    }
+    selectionOfIME->RemoveAllRanges(ignoredError);
+    NS_WARNING_ASSERTION(!ignoredError.Failed(),
+                         "Selection::RemoveAllRanges() failed, but ignored");
+    ignoredError.SuppressException();
+  }
+
+  // Set caret position and selection of IME composition with TextRangeArray.
+  bool setCaret = false;
+  uint32_t countOfRanges = aRanges ? aRanges->Length() : 0;
+
+#ifdef DEBUG
+  // Bounds-checking on debug builds
+  uint32_t maxOffset = aTextNode->Length();
+#endif
+
+  // NOTE: composition string may be truncated when it's committed and
+  //       maxlength attribute value doesn't allow input of all text of this
+  //       composition.
+  nsresult rv = NS_OK;
+  for (uint32_t i = 0; i < countOfRanges; ++i) {
+    const TextRange& textRange = aRanges->ElementAt(i);
+
+    // Caret needs special handling since its length may be 0 and if it's not
+    // specified explicitly, we need to handle it ourselves later.
+    if (textRange.mRangeType == TextRangeType::eCaret) {
+      NS_ASSERTION(!setCaret, "The ranges already has caret position");
+      NS_ASSERTION(!textRange.Length(),
+                   "EditorBase doesn't support wide caret");
+      int32_t caretOffset = static_cast<int32_t>(
+          aOffsetInNode +
+          std::min(textRange.mStartOffset, aLengthOfCompositionString));
+      MOZ_ASSERT(caretOffset >= 0 &&
+                 static_cast<uint32_t>(caretOffset) <= maxOffset);
+      rv = selection->CollapseInLimiter(aTextNode, caretOffset);
+      NS_WARNING_ASSERTION(
+          NS_SUCCEEDED(rv),
+          "Selection::CollapseInLimiter() failed, but might be ignored");
+      setCaret = setCaret || NS_SUCCEEDED(rv);
+      if (!setCaret) {
+        continue;
+      }
+      // If caret range is specified explicitly, we should show the caret if
+      // it should be so.
+      aEditorBase.HideCaret(false);
+      continue;
+    }
+
+    // If the clause length is 0, it should be a bug.
+    if (!textRange.Length()) {
+      NS_WARNING("Any clauses must not be empty");
+      continue;
+    }
+
+    RefPtr<nsRange> clauseRange;
+    int32_t startOffset = static_cast<int32_t>(
+        aOffsetInNode +
+        std::min(textRange.mStartOffset, aLengthOfCompositionString));
+    MOZ_ASSERT(startOffset >= 0 &&
+               static_cast<uint32_t>(startOffset) <= maxOffset);
+    int32_t endOffset = static_cast<int32_t>(
+        aOffsetInNode +
+        std::min(textRange.mEndOffset, aLengthOfCompositionString));
+    MOZ_ASSERT(endOffset >= startOffset &&
+               static_cast<uint32_t>(endOffset) <= maxOffset);
+    clauseRange = nsRange::Create(aTextNode, startOffset, aTextNode, endOffset,
+                                  IgnoreErrors());
+    if (!clauseRange) {
+      NS_WARNING("nsRange::Create() failed, but might be ignored");
+      break;
+    }
+
+    // Set the range of the clause to selection.
+    RefPtr<Selection> selectionOfIME = selectionController->GetSelection(
+        ToRawSelectionType(textRange.mRangeType));
+    if (!selectionOfIME) {
+      NS_WARNING(
+          "nsISelectionController::GetSelection() failed, but might be "
+          "ignored");
+      break;
+    }
+
+    IgnoredErrorResult ignoredError;
+    selectionOfIME->AddRangeAndSelectFramesAndNotifyListeners(*clauseRange,
+                                                              ignoredError);
+    if (ignoredError.Failed()) {
+      NS_WARNING(
+          "Selection::AddRangeAndSelectFramesAndNotifyListeners() failed, but "
+          "might be ignored");
+      break;
+    }
+
+    // Set the style of the clause.
+    rv = selectionOfIME->SetTextRangeStyle(clauseRange, textRange.mRangeStyle);
+    if (NS_FAILED(rv)) {
+      NS_WARNING("Selection::SetTextRangeStyle() failed, but might be ignored");
+      break;  // but this is unexpected...
+    }
+  }
+
+  // If the ranges doesn't include explicit caret position, let's set the
+  // caret to the end of composition string.
+  if (!setCaret) {
+    int32_t caretOffset =
+        static_cast<int32_t>(aOffsetInNode + aLengthOfCompositionString);
+    MOZ_ASSERT(caretOffset >= 0 &&
+               static_cast<uint32_t>(caretOffset) <= maxOffset);
+    rv = selection->CollapseInLimiter(aTextNode, caretOffset);
+    NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
+                         "Selection::CollapseInLimiter() failed");
+
+    // If caret range isn't specified explicitly, we should hide the caret.
+    // Hiding the caret benefits a Windows build (see bug 555642 comment #6).
+    // However, when there is no range, we should keep showing caret.
+    if (countOfRanges) {
+      aEditorBase.HideCaret(true);
+    }
+  }
+
+  return rv;
+}
+
+}  // namespace mozilla