Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

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

1 files changed, 273 insertions, 0 deletions

diff --git a/editor/libeditor/TextEditorDataTransfer.cpp b/editor/libeditor/TextEditorDataTransfer.cpp
new file mode 100644
index 0000000000..1ca11e7adb
--- /dev/null
+++ b/editor/libeditor/TextEditorDataTransfer.cpp
@@ -0,0 +1,273 @@
+/* -*- 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 "TextEditor.h"
+
+#include "EditorUtils.h"
+#include "HTMLEditor.h"
+#include "SelectionState.h"
+
+#include "mozilla/ArrayUtils.h"
+#include "mozilla/MouseEvents.h"
+#include "mozilla/dom/DataTransfer.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/DocumentInlines.h"
+#include "mozilla/dom/Selection.h"
+
+#include "nsAString.h"
+#include "nsCOMPtr.h"
+#include "nsContentUtils.h"
+#include "nsDebug.h"
+#include "nsError.h"
+#include "nsIClipboard.h"
+#include "nsIContent.h"
+#include "nsIDragService.h"
+#include "nsIDragSession.h"
+#include "nsIPrincipal.h"
+#include "nsIFormControl.h"
+#include "nsISupportsPrimitives.h"
+#include "nsITransferable.h"
+#include "nsIVariant.h"
+#include "nsLiteralString.h"
+#include "nsRange.h"
+#include "nsServiceManagerUtils.h"
+#include "nsString.h"
+#include "nsXPCOM.h"
+#include "nscore.h"
+
+namespace mozilla {
+
+using namespace dom;
+
+nsresult TextEditor::InsertTextFromTransferable(
+    nsITransferable* aTransferable) {
+  MOZ_ASSERT(IsEditActionDataAvailable());
+  MOZ_ASSERT(IsTextEditor());
+
+  nsAutoCString bestFlavor;
+  nsCOMPtr<nsISupports> genericDataObj;
+  nsresult rv = aTransferable->GetAnyTransferData(
+      bestFlavor, getter_AddRefs(genericDataObj));
+  NS_WARNING_ASSERTION(
+      NS_SUCCEEDED(rv),
+      "nsITransferable::GetAnyDataTransferData() failed, but ignored");
+  if (NS_SUCCEEDED(rv) && (bestFlavor.EqualsLiteral(kTextMime) ||
+                           bestFlavor.EqualsLiteral(kMozTextInternal))) {
+    AutoTransactionsConserveSelection dontChangeMySelection(*this);
+
+    nsAutoString stuffToPaste;
+    if (nsCOMPtr<nsISupportsString> text = do_QueryInterface(genericDataObj)) {
+      text->GetData(stuffToPaste);
+    }
+    MOZ_ASSERT(GetEditAction() == EditAction::ePaste);
+    // Use native line breaks for compatibility with Chrome.
+    // XXX Although, somebody has already converted native line breaks to
+    //     XP line breaks.
+    UpdateEditActionData(stuffToPaste);
+
+    nsresult rv = MaybeDispatchBeforeInputEvent();
+    if (NS_FAILED(rv)) {
+      NS_WARNING_ASSERTION(
+          rv == NS_ERROR_EDITOR_ACTION_CANCELED,
+          "EditorBase::MaybeDispatchBeforeInputEvent() failed");
+      return rv;
+    }
+
+    if (!stuffToPaste.IsEmpty()) {
+      // Sanitize possible carriage returns in the string to be inserted
+      nsContentUtils::PlatformToDOMLineBreaks(stuffToPaste);
+
+      AutoPlaceholderBatch treatAsOneTransaction(
+          *this, ScrollSelectionIntoView::Yes, __FUNCTION__);
+      nsresult rv =
+          InsertTextAsSubAction(stuffToPaste, SelectionHandling::Delete);
+      if (NS_FAILED(rv)) {
+        NS_WARNING("EditorBase::InsertTextAsSubAction() failed");
+        return rv;
+      }
+    }
+  }
+
+  // Try to scroll the selection into view if the paste/drop succeeded
+  rv = ScrollSelectionFocusIntoView();
+  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
+                       "EditorBase::ScrollSelectionFocusIntoView() failed");
+  return rv;
+}
+
+nsresult TextEditor::InsertDroppedDataTransferAsAction(
+    AutoEditActionDataSetter& aEditActionData, DataTransfer& aDataTransfer,
+    const EditorDOMPoint& aDroppedAt, nsIPrincipal* aSourcePrincipal) {
+  MOZ_ASSERT(aEditActionData.GetEditAction() == EditAction::eDrop);
+  MOZ_ASSERT(GetEditAction() == EditAction::eDrop);
+  MOZ_ASSERT(aDroppedAt.IsSet());
+  MOZ_ASSERT(aDataTransfer.MozItemCount() > 0);
+
+  uint32_t numItems = aDataTransfer.MozItemCount();
+  AutoTArray<nsString, 5> textArray;
+  textArray.SetCapacity(numItems);
+  uint32_t textLength = 0;
+  for (uint32_t i = 0; i < numItems; ++i) {
+    nsCOMPtr<nsIVariant> data;
+    aDataTransfer.GetDataAtNoSecurityCheck(u"text/plain"_ns, i,
+                                           getter_AddRefs(data));
+    if (!data) {
+      continue;
+    }
+    // Use nsString to avoid copying its storage to textArray.
+    nsString insertText;
+    data->GetAsAString(insertText);
+    if (insertText.IsEmpty()) {
+      continue;
+    }
+    textArray.AppendElement(insertText);
+    textLength += insertText.Length();
+  }
+  // Use nsString to avoid copying its storage to aEditActionData.
+  nsString data;
+  data.SetCapacity(textLength);
+  // Join the text array from end to start because we insert each items
+  // in the aDataTransfer at same point from start to end.  Although I
+  // don't know whether this is intentional behavior.
+  for (nsString& text : Reversed(textArray)) {
+    data.Append(text);
+  }
+  // Use native line breaks for compatibility with Chrome.
+  // XXX Although, somebody has already converted native line breaks to
+  //     XP line breaks.
+  aEditActionData.SetData(data);
+
+  nsresult rv = aEditActionData.MaybeDispatchBeforeInputEvent();
+  if (NS_FAILED(rv)) {
+    NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
+                         "MaybeDispatchBeforeInputEvent() failed");
+    return rv;
+  }
+
+  // Then, insert the text.  Note that we shouldn't need to walk the array
+  // anymore because nobody should listen to mutation events of anonymous
+  // text node in <input>/<textarea>.
+  nsContentUtils::PlatformToDOMLineBreaks(data);
+  rv = InsertTextAt(data, aDroppedAt, DeleteSelectedContent::No);
+  if (NS_WARN_IF(Destroyed())) {
+    return NS_ERROR_EDITOR_DESTROYED;
+  }
+  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
+                       "EditorBase::InsertTextAt(DeleteSelectedContent::No) "
+                       "failed, but ignored");
+  return rv;
+}
+
+nsresult TextEditor::HandlePaste(AutoEditActionDataSetter& aEditActionData,
+                                 int32_t aClipboardType) {
+  if (NS_WARN_IF(!GetDocument())) {
+    return NS_OK;
+  }
+
+  // The data will be initialized in InsertTextFromTransferable() if we're not
+  // an HTMLEditor.  Therefore, we cannot dispatch "beforeinput" here.
+
+  // Get Clipboard Service
+  nsresult rv;
+  nsCOMPtr<nsIClipboard> clipboard =
+      do_GetService("@mozilla.org/widget/clipboard;1", &rv);
+  if (NS_FAILED(rv)) {
+    NS_WARNING("Failed to get nsIClipboard service");
+    return rv;
+  }
+
+  // Get the nsITransferable interface for getting the data from the clipboard
+  Result<nsCOMPtr<nsITransferable>, nsresult> maybeTransferable =
+      EditorUtils::CreateTransferableForPlainText(*GetDocument());
+  if (maybeTransferable.isErr()) {
+    NS_WARNING("EditorUtils::CreateTransferableForPlainText() failed");
+    return maybeTransferable.unwrapErr();
+  }
+  nsCOMPtr<nsITransferable> transferable(maybeTransferable.unwrap());
+  if (NS_WARN_IF(!transferable)) {
+    NS_WARNING(
+        "EditorUtils::CreateTransferableForPlainText() returned nullptr, but "
+        "ignored");
+    return NS_OK;  // XXX Why?
+  }
+  // Get the Data from the clipboard.
+  rv = clipboard->GetData(transferable, aClipboardType);
+  if (NS_FAILED(rv)) {
+    NS_WARNING("nsIClipboard::GetData() failed, but ignored");
+    return NS_OK;  // XXX Why?
+  }
+  // XXX Why don't we check this first?
+  if (!IsModifiable()) {
+    return NS_OK;
+  }
+  rv = InsertTextFromTransferable(transferable);
+  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
+                       "TextEditor::InsertTextFromTransferable() failed");
+  return rv;
+}
+
+nsresult TextEditor::HandlePasteTransferable(
+    AutoEditActionDataSetter& aEditActionData, nsITransferable& aTransferable) {
+  if (!IsModifiable()) {
+    return NS_OK;
+  }
+
+  // FYI: The data of beforeinput will be initialized in
+  // InsertTextFromTransferable().  Therefore, here does not touch
+  // aEditActionData.
+  nsresult rv = InsertTextFromTransferable(&aTransferable);
+  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
+                       "TextEditor::InsertTextFromTransferable() failed");
+  return rv;
+}
+
+bool TextEditor::CanPaste(int32_t aClipboardType) const {
+  if (AreClipboardCommandsUnconditionallyEnabled()) {
+    return true;
+  }
+
+  // can't paste if readonly
+  if (!IsModifiable()) {
+    return false;
+  }
+
+  nsresult rv;
+  nsCOMPtr<nsIClipboard> clipboard(
+      do_GetService("@mozilla.org/widget/clipboard;1", &rv));
+  if (NS_FAILED(rv)) {
+    NS_WARNING("Failed to get nsIClipboard service");
+    return false;
+  }
+
+  // the flavors that we can deal with
+  AutoTArray<nsCString, 1> textEditorFlavors = {nsDependentCString(kTextMime)};
+
+  bool haveFlavors;
+  rv = clipboard->HasDataMatchingFlavors(textEditorFlavors, aClipboardType,
+                                         &haveFlavors);
+  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
+                       "nsIClipboard::HasDataMatchingFlavors() failed");
+  return NS_SUCCEEDED(rv) && haveFlavors;
+}
+
+bool TextEditor::CanPasteTransferable(nsITransferable* aTransferable) {
+  // can't paste if readonly
+  if (!IsModifiable()) {
+    return false;
+  }
+
+  // If |aTransferable| is null, assume that a paste will succeed.
+  if (!aTransferable) {
+    return true;
+  }
+
+  nsCOMPtr<nsISupports> data;
+  nsresult rv = aTransferable->GetTransferData(kTextMime, getter_AddRefs(data));
+  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
+                       "nsITransferable::GetTransferData(kTextMime) failed");
+  return NS_SUCCEEDED(rv) && data;
+}
+
+}  // namespace mozilla