summaryrefslogtreecommitdiffstats
path: root/editor/libeditor/TextEditRulesBidi.cpp
diff options
context:
space:
mode:
authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /editor/libeditor/TextEditRulesBidi.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
downloadUXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.gz
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.lz
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.xz
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.zip
Add m-esr52 at 52.6.0
Diffstat (limited to 'editor/libeditor/TextEditRulesBidi.cpp')
-rw-r--r--editor/libeditor/TextEditRulesBidi.cpp100
1 files changed, 100 insertions, 0 deletions
diff --git a/editor/libeditor/TextEditRulesBidi.cpp b/editor/libeditor/TextEditRulesBidi.cpp
new file mode 100644
index 000000000..f6b8b7120
--- /dev/null
+++ b/editor/libeditor/TextEditRulesBidi.cpp
@@ -0,0 +1,100 @@
+/* -*- 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 "mozilla/TextEditRules.h"
+
+#include "mozilla/TextEditor.h"
+#include "mozilla/dom/Selection.h"
+#include "nsCOMPtr.h"
+#include "nsDebug.h"
+#include "nsError.h"
+#include "nsFrameSelection.h"
+#include "nsIContent.h"
+#include "nsIDOMNode.h"
+#include "nsIEditor.h"
+#include "nsIPresShell.h"
+#include "nsISupportsImpl.h"
+#include "nsPresContext.h"
+#include "nscore.h"
+
+namespace mozilla {
+
+using namespace dom;
+
+// Test for distance between caret and text that will be deleted
+nsresult
+TextEditRules::CheckBidiLevelForDeletion(Selection* aSelection,
+ nsIDOMNode* aSelNode,
+ int32_t aSelOffset,
+ nsIEditor::EDirection aAction,
+ bool* aCancel)
+{
+ NS_ENSURE_ARG_POINTER(aCancel);
+ *aCancel = false;
+
+ nsCOMPtr<nsIPresShell> shell = mTextEditor->GetPresShell();
+ NS_ENSURE_TRUE(shell, NS_ERROR_NOT_INITIALIZED);
+
+ nsPresContext *context = shell->GetPresContext();
+ NS_ENSURE_TRUE(context, NS_ERROR_NULL_POINTER);
+
+ if (!context->BidiEnabled()) {
+ return NS_OK;
+ }
+
+ nsCOMPtr<nsIContent> content = do_QueryInterface(aSelNode);
+ NS_ENSURE_TRUE(content, NS_ERROR_NULL_POINTER);
+
+ nsBidiLevel levelBefore;
+ nsBidiLevel levelAfter;
+ RefPtr<nsFrameSelection> frameSelection =
+ aSelection->AsSelection()->GetFrameSelection();
+ NS_ENSURE_TRUE(frameSelection, NS_ERROR_NULL_POINTER);
+
+ nsPrevNextBidiLevels levels = frameSelection->
+ GetPrevNextBidiLevels(content, aSelOffset, true);
+
+ levelBefore = levels.mLevelBefore;
+ levelAfter = levels.mLevelAfter;
+
+ nsBidiLevel currentCaretLevel = frameSelection->GetCaretBidiLevel();
+
+ nsBidiLevel levelOfDeletion;
+ levelOfDeletion =
+ (nsIEditor::eNext==aAction || nsIEditor::eNextWord==aAction) ?
+ levelAfter : levelBefore;
+
+ if (currentCaretLevel == levelOfDeletion) {
+ return NS_OK; // perform the deletion
+ }
+
+ if (!mDeleteBidiImmediately && levelBefore != levelAfter) {
+ *aCancel = true;
+ }
+
+ // Set the bidi level of the caret to that of the
+ // character that will be (or would have been) deleted
+ frameSelection->SetCaretBidiLevel(levelOfDeletion);
+ return NS_OK;
+}
+
+void
+TextEditRules::UndefineCaretBidiLevel(Selection* aSelection)
+{
+ /**
+ * After inserting text the caret Bidi level must be set to the level of the
+ * inserted text.This is difficult, because we cannot know what the level is
+ * until after the Bidi algorithm is applied to the whole paragraph.
+ *
+ * So we set the caret Bidi level to UNDEFINED here, and the caret code will
+ * set it correctly later
+ */
+ RefPtr<nsFrameSelection> frameSelection = aSelection->GetFrameSelection();
+ if (frameSelection) {
+ frameSelection->UndefineCaretBidiLevel();
+ }
+}
+
+} // namespace mozilla