Adding upstream version 1:115.7.0.upstream/1%115.7.0 upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
author: Daniel Baumann <daniel.baumann@progress-linux.org> 2024-04-07 17:32:43 +0000
committer: Daniel Baumann <daniel.baumann@progress-linux.org> 2024-04-07 17:32:43 +0000
commit: 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch)
tree: a68f146d7fa01f0134297619fbe7e33db084e0aa /editor/libeditor/HTMLAbsPositionEditor.cpp
parent: Initial commit. (diff)
download: thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz
thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip
1 files changed, 993 insertions, 0 deletions
diff --git a/editor/libeditor/HTMLAbsPositionEditor.cpp b/editor/libeditor/HTMLAbsPositionEditor.cpp
new file mode 100644
index 0000000000..2378d243dd
--- /dev/null
+++ b/editor/libeditor/HTMLAbsPositionEditor.cpp
@@ -0,0 +1,993 @@
+/* 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 "HTMLEditor.h"
+
+#include <math.h>
+
+#include "CSSEditUtils.h"
+#include "EditAction.h"
+#include "HTMLEditHelpers.h"
+#include "HTMLEditorEventListener.h"
+#include "HTMLEditUtils.h"
+
+#include "mozilla/EventListenerManager.h"
+#include "mozilla/mozalloc.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/PresShell.h"
+#include "mozilla/StaticPrefs_editor.h"
+#include "mozilla/dom/AncestorIterator.h"
+#include "mozilla/dom/Selection.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/EventTarget.h"
+#include "nsAString.h"
+#include "nsAlgorithm.h"
+#include "nsCOMPtr.h"
+#include "nsComputedDOMStyle.h"
+#include "nsDebug.h"
+#include "nsError.h"
+#include "nsGkAtoms.h"
+#include "nsIContent.h"
+#include "nsROCSSPrimitiveValue.h"
+#include "nsINode.h"
+#include "nsIPrincipal.h"
+#include "nsISupportsImpl.h"
+#include "nsISupportsUtils.h"
+#include "nsLiteralString.h"
+#include "nsReadableUtils.h"
+#include "nsString.h"
+#include "nsStringFwd.h"
+#include "nsStyledElement.h"
+#include "nscore.h"
+#include <algorithm>
+
+namespace mozilla {
+
+using namespace dom;
+
+nsresult HTMLEditor::SetSelectionToAbsoluteOrStaticAsAction(
+    bool aEnabled, nsIPrincipal* aPrincipal) {
+  AutoEditActionDataSetter editActionData(
+      *this, EditAction::eSetPositionToAbsoluteOrStatic, aPrincipal);
+  nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
+  if (NS_FAILED(rv)) {
+    NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
+                         "CanHandleAndMaybeDispatchBeforeInputEvent(), failed");
+    return rv;
+  }
+
+  const RefPtr<Element> editingHost = ComputeEditingHost();
+  if (!editingHost) {
+    return NS_SUCCESS_DOM_NO_OPERATION;
+  }
+
+  if (aEnabled) {
+    Result<EditActionResult, nsresult> result =
+        SetSelectionToAbsoluteAsSubAction(*editingHost);
+    if (MOZ_UNLIKELY(result.isErr())) {
+      NS_WARNING("HTMLEditor::SetSelectionToAbsoluteAsSubAction() failed");
+      return result.unwrapErr();
+    }
+    return NS_OK;
+  }
+  Result<EditActionResult, nsresult> result = SetSelectionToStaticAsSubAction();
+  if (MOZ_UNLIKELY(result.isErr())) {
+    NS_WARNING("HTMLEditor::SetSelectionToStaticAsSubAction() failed");
+    return result.unwrapErr();
+  }
+  return NS_OK;
+}
+
+already_AddRefed<Element>
+HTMLEditor::GetAbsolutelyPositionedSelectionContainer() const {
+  AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
+  if (NS_WARN_IF(!editActionData.CanHandle())) {
+    return nullptr;
+  }
+
+  Element* selectionContainerElement = GetSelectionContainerElement();
+  if (NS_WARN_IF(!selectionContainerElement)) {
+    return nullptr;
+  }
+
+  AutoTArray<RefPtr<Element>, 24> arrayOfParentElements;
+  for (Element* element :
+       selectionContainerElement->InclusiveAncestorsOfType<Element>()) {
+    arrayOfParentElements.AppendElement(element);
+  }
+
+  nsAutoString positionValue;
+  for (RefPtr<Element> element = selectionContainerElement; element;
+       element = element->GetParentElement()) {
+    if (element->IsHTMLElement(nsGkAtoms::html)) {
+      NS_WARNING(
+          "HTMLEditor::GetAbsolutelyPositionedSelectionContainer() reached "
+          "<html> element");
+      return nullptr;
+    }
+    nsCOMPtr<nsINode> parentNode = element->GetParentNode();
+    nsresult rv = CSSEditUtils::GetComputedProperty(
+        MOZ_KnownLive(*element), *nsGkAtoms::position, positionValue);
+    if (NS_FAILED(rv)) {
+      NS_WARNING(
+          "CSSEditUtils::GetComputedProperty(nsGkAtoms::position) failed");
+      return nullptr;
+    }
+    if (NS_WARN_IF(Destroyed()) ||
+        NS_WARN_IF(parentNode != element->GetParentNode())) {
+      return nullptr;
+    }
+    if (positionValue.EqualsLiteral("absolute")) {
+      return element.forget();
+    }
+  }
+  return nullptr;
+}
+
+NS_IMETHODIMP HTMLEditor::GetAbsolutePositioningEnabled(bool* aIsEnabled) {
+  *aIsEnabled = IsAbsolutePositionEditorEnabled();
+  return NS_OK;
+}
+
+NS_IMETHODIMP HTMLEditor::SetAbsolutePositioningEnabled(bool aIsEnabled) {
+  EnableAbsolutePositionEditor(aIsEnabled);
+  return NS_OK;
+}
+
+Result<int32_t, nsresult> HTMLEditor::AddZIndexWithTransaction(
+    nsStyledElement& aStyledElement, int32_t aChange) {
+  if (!aChange) {
+    return 0;  // XXX Why don't we return current z-index value in this case?
+  }
+
+  int32_t zIndex = GetZIndex(aStyledElement);
+  if (NS_WARN_IF(Destroyed())) {
+    return Err(NS_ERROR_EDITOR_DESTROYED);
+  }
+  zIndex = std::max(zIndex + aChange, 0);
+  nsresult rv = SetZIndexWithTransaction(aStyledElement, zIndex);
+  if (rv == NS_ERROR_EDITOR_DESTROYED) {
+    NS_WARNING("HTMLEditor::SetZIndexWithTransaction() destroyed the editor");
+    return Err(NS_ERROR_EDITOR_DESTROYED);
+  }
+  NS_WARNING_ASSERTION(
+      NS_SUCCEEDED(rv),
+      "HTMLEditor::SetZIndexWithTransaction() failed, but ignored");
+  return zIndex;
+}
+
+nsresult HTMLEditor::SetZIndexWithTransaction(nsStyledElement& aStyledElement,
+                                              int32_t aZIndex) {
+  nsAutoString zIndexValue;
+  zIndexValue.AppendInt(aZIndex);
+
+  nsresult rv = CSSEditUtils::SetCSSPropertyWithTransaction(
+      *this, aStyledElement, *nsGkAtoms::z_index, zIndexValue);
+  if (rv == NS_ERROR_EDITOR_DESTROYED) {
+    NS_WARNING(
+        "CSSEditUtils::SetCSSPropertyWithTransaction(nsGkAtoms::z_index) "
+        "destroyed the editor");
+    return NS_ERROR_EDITOR_DESTROYED;
+  }
+  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
+                       "CSSEditUtils::SetCSSPropertyWithTransaction(nsGkAtoms::"
+                       "z_index) failed, but ignored");
+  return NS_OK;
+}
+
+nsresult HTMLEditor::AddZIndexAsAction(int32_t aChange,
+                                       nsIPrincipal* aPrincipal) {
+  MOZ_ASSERT(IsEditActionDataAvailable());
+
+  AutoEditActionDataSetter editActionData(
+      *this, EditAction::eIncreaseOrDecreaseZIndex, aPrincipal);
+  nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
+  if (NS_FAILED(rv)) {
+    NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
+                         "CanHandleAndMaybeDispatchBeforeInputEvent(), failed");
+    return EditorBase::ToGenericNSResult(rv);
+  }
+
+  Result<EditActionResult, nsresult> result = AddZIndexAsSubAction(aChange);
+  if (MOZ_UNLIKELY(result.isErr())) {
+    NS_WARNING("HTMLEditor::AddZIndexAsSubAction() failed");
+    return EditorBase::ToGenericNSResult(result.unwrapErr());
+  }
+  return NS_OK;
+}
+
+int32_t HTMLEditor::GetZIndex(Element& aElement) {
+  AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
+  if (NS_WARN_IF(!editActionData.CanHandle())) {
+    return 0;
+  }
+
+  nsAutoString zIndexValue;
+
+  nsresult rv = CSSEditUtils::GetSpecifiedProperty(
+      aElement, *nsGkAtoms::z_index, zIndexValue);
+  if (NS_FAILED(rv)) {
+    NS_WARNING("CSSEditUtils::GetSpecifiedProperty(nsGkAtoms::z_index) failed");
+    return 0;
+  }
+  if (zIndexValue.EqualsLiteral("auto")) {
+    if (!aElement.GetParentElement()) {
+      NS_WARNING("aElement was an orphan node or the root node");
+      return 0;
+    }
+    // we have to look at the positioned ancestors
+    // cf. CSS 2 spec section 9.9.1
+    nsAutoString positionValue;
+    for (RefPtr<Element> element = aElement.GetParentElement(); element;
+         element = element->GetParentElement()) {
+      if (element->IsHTMLElement(nsGkAtoms::body)) {
+        return 0;
+      }
+      nsCOMPtr<nsINode> parentNode = element->GetParentElement();
+      nsresult rv = CSSEditUtils::GetComputedProperty(
+          *element, *nsGkAtoms::position, positionValue);
+      if (NS_FAILED(rv)) {
+        NS_WARNING(
+            "CSSEditUtils::GetComputedProperty(nsGkAtoms::position) failed");
+        return 0;
+      }
+      if (NS_WARN_IF(Destroyed()) ||
+          NS_WARN_IF(parentNode != element->GetParentNode())) {
+        return 0;
+      }
+      if (!positionValue.EqualsLiteral("absolute")) {
+        continue;
+      }
+      // ah, we found one, what's its z-index ? If its z-index is auto,
+      // we have to continue climbing the document's tree
+      rv = CSSEditUtils::GetComputedProperty(*element, *nsGkAtoms::z_index,
+                                             zIndexValue);
+      if (NS_FAILED(rv)) {
+        NS_WARNING(
+            "CSSEditUtils::GetComputedProperty(nsGkAtoms::z_index) failed");
+        return 0;
+      }
+      if (NS_WARN_IF(Destroyed()) ||
+          NS_WARN_IF(parentNode != element->GetParentNode())) {
+        return 0;
+      }
+      if (!zIndexValue.EqualsLiteral("auto")) {
+        break;
+      }
+    }
+  }
+
+  if (zIndexValue.EqualsLiteral("auto")) {
+    return 0;
+  }
+
+  nsresult rvIgnored;
+  int32_t result = zIndexValue.ToInteger(&rvIgnored);
+  NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
+                       "nsAString::ToInteger() failed, but ignored");
+  return result;
+}
+
+bool HTMLEditor::CreateGrabberInternal(nsIContent& aParentContent) {
+  if (NS_WARN_IF(mGrabber)) {
+    return false;
+  }
+
+  mGrabber = CreateAnonymousElement(nsGkAtoms::span, aParentContent,
+                                    u"mozGrabber"_ns, false);
+
+  // mGrabber may be destroyed during creation due to there may be
+  // mutation event listener.
+  if (!mGrabber) {
+    NS_WARNING(
+        "HTMLEditor::CreateAnonymousElement(nsGkAtoms::span, mozGrabber) "
+        "failed");
+    return false;
+  }
+
+  EventListenerManager* eventListenerManager =
+      mGrabber->GetOrCreateListenerManager();
+  eventListenerManager->AddEventListenerByType(
+      mEventListener, u"mousedown"_ns, TrustedEventsAtSystemGroupBubble());
+  MOZ_ASSERT(mGrabber);
+  return true;
+}
+
+nsresult HTMLEditor::RefreshGrabberInternal() {
+  MOZ_ASSERT(IsEditActionDataAvailable());
+
+  if (!mAbsolutelyPositionedObject) {
+    return NS_OK;
+  }
+
+  OwningNonNull<Element> absolutelyPositionedObject =
+      *mAbsolutelyPositionedObject;
+  nsresult rv = GetPositionAndDimensions(
+      absolutelyPositionedObject, mPositionedObjectX, mPositionedObjectY,
+      mPositionedObjectWidth, mPositionedObjectHeight,
+      mPositionedObjectBorderLeft, mPositionedObjectBorderTop,
+      mPositionedObjectMarginLeft, mPositionedObjectMarginTop);
+  if (NS_FAILED(rv)) {
+    NS_WARNING("HTMLEditor::GetPositionAndDimensions() failed");
+    return rv;
+  }
+  if (NS_WARN_IF(absolutelyPositionedObject != mAbsolutelyPositionedObject)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  RefPtr<nsStyledElement> grabberStyledElement =
+      nsStyledElement::FromNodeOrNull(mGrabber.get());
+  if (!grabberStyledElement) {
+    return NS_OK;
+  }
+  rv = SetAnonymousElementPositionWithoutTransaction(
+      *grabberStyledElement, mPositionedObjectX + 12, mPositionedObjectY - 14);
+  if (NS_WARN_IF(Destroyed())) {
+    return NS_ERROR_EDITOR_DESTROYED;
+  }
+  if (NS_FAILED(rv)) {
+    NS_WARNING(
+        "HTMLEditor::SetAnonymousElementPositionWithoutTransaction() failed");
+    return rv;
+  }
+  if (NS_WARN_IF(grabberStyledElement != mGrabber.get())) {
+    return NS_ERROR_FAILURE;
+  }
+  return NS_OK;
+}
+
+void HTMLEditor::HideGrabberInternal() {
+  if (NS_WARN_IF(!mAbsolutelyPositionedObject)) {
+    return;
+  }
+
+  // Move all members to the local variables first since mutation event
+  // listener may try to show grabber while we're hiding them.
+  RefPtr<Element> absolutePositioningObject =
+      std::move(mAbsolutelyPositionedObject);
+  ManualNACPtr grabber = std::move(mGrabber);
+  ManualNACPtr positioningShadow = std::move(mPositioningShadow);
+
+  // If we're still in dragging mode, it means that the dragging is canceled
+  // by the web app.
+  if (mGrabberClicked || mIsMoving) {
+    mGrabberClicked = false;
+    mIsMoving = false;
+    if (mEventListener) {
+      DebugOnly<nsresult> rvIgnored =
+          static_cast<HTMLEditorEventListener*>(mEventListener.get())
+              ->ListenToMouseMoveEventForGrabber(false);
+      NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
+                           "HTMLEditorEventListener::"
+                           "ListenToMouseMoveEventForGrabber(false) failed");
+    }
+  }
+
+  DebugOnly<nsresult> rv = absolutePositioningObject->UnsetAttr(
+      kNameSpaceID_None, nsGkAtoms::_moz_abspos, true);
+  NS_WARNING_ASSERTION(
+      NS_SUCCEEDED(rv),
+      "Element::UnsetAttr(nsGkAtoms::_moz_abspos) failed, but ignored");
+
+  // We allow the pres shell to be null; when it is, we presume there
+  // are no document observers to notify, but we still want to
+  // UnbindFromTree.
+  RefPtr<PresShell> presShell = GetPresShell();
+  if (grabber) {
+    DeleteRefToAnonymousNode(std::move(grabber), presShell);
+  }
+  if (positioningShadow) {
+    DeleteRefToAnonymousNode(std::move(positioningShadow), presShell);
+  }
+}
+
+nsresult HTMLEditor::ShowGrabberInternal(Element& aElement) {
+  MOZ_ASSERT(IsEditActionDataAvailable());
+
+  const RefPtr<Element> editingHost = ComputeEditingHost();
+  if (NS_WARN_IF(!editingHost) ||
+      NS_WARN_IF(!aElement.IsInclusiveDescendantOf(editingHost))) {
+    return NS_ERROR_UNEXPECTED;
+  }
+
+  if (NS_WARN_IF(mGrabber)) {
+    return NS_ERROR_UNEXPECTED;
+  }
+
+  nsAutoString classValue;
+  nsresult rv =
+      GetTemporaryStyleForFocusedPositionedElement(aElement, classValue);
+  if (NS_FAILED(rv)) {
+    NS_WARNING(
+        "HTMLEditor::GetTemporaryStyleForFocusedPositionedElement() failed");
+    return rv;
+  }
+
+  rv = aElement.SetAttr(kNameSpaceID_None, nsGkAtoms::_moz_abspos, classValue,
+                        true);
+  if (NS_FAILED(rv)) {
+    NS_WARNING("Element::SetAttr(nsGkAtoms::_moz_abspos) failed");
+    return rv;
+  }
+
+  mAbsolutelyPositionedObject = &aElement;
+
+  Element* parentElement = aElement.GetParentElement();
+  if (NS_WARN_IF(!parentElement)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  if (!CreateGrabberInternal(*parentElement)) {
+    NS_WARNING("HTMLEditor::CreateGrabberInternal() failed");
+    return NS_ERROR_FAILURE;
+  }
+
+  // If we succeeded to create the grabber, HideGrabberInternal() hasn't been
+  // called yet.  So, mAbsolutelyPositionedObject should be non-nullptr.
+  MOZ_ASSERT(mAbsolutelyPositionedObject);
+
+  // Finally, move the grabber to proper position.
+  rv = RefreshGrabberInternal();
+  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
+                       "HTMLEditor::RefereshGrabberInternal() failed");
+  return rv;
+}
+
+nsresult HTMLEditor::StartMoving() {
+  MOZ_ASSERT(mGrabber);
+
+  RefPtr<Element> parentElement = mGrabber->GetParentElement();
+  if (NS_WARN_IF(!parentElement) || NS_WARN_IF(!mAbsolutelyPositionedObject)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  // now, let's create the resizing shadow
+  mPositioningShadow =
+      CreateShadow(*parentElement, *mAbsolutelyPositionedObject);
+  if (!mPositioningShadow) {
+    NS_WARNING("HTMLEditor::CreateShadow() failed");
+    return NS_ERROR_FAILURE;
+  }
+  if (!mAbsolutelyPositionedObject) {
+    NS_WARNING("The target has gone during HTMLEditor::CreateShadow()");
+    return NS_ERROR_FAILURE;
+  }
+  RefPtr<Element> positioningShadow = mPositioningShadow.get();
+  RefPtr<Element> absolutelyPositionedObject = mAbsolutelyPositionedObject;
+  nsresult rv =
+      SetShadowPosition(*positioningShadow, *absolutelyPositionedObject,
+                        mPositionedObjectX, mPositionedObjectY);
+  if (NS_FAILED(rv)) {
+    NS_WARNING("HTMLEditor::SetShadowPosition() failed");
+    return rv;
+  }
+
+  // make the shadow appear
+  DebugOnly<nsresult> rvIgnored =
+      mPositioningShadow->UnsetAttr(kNameSpaceID_None, nsGkAtoms::_class, true);
+  NS_WARNING_ASSERTION(
+      NS_SUCCEEDED(rvIgnored),
+      "Element::UnsetAttr(nsGkAtoms::_class) failed, but ignored");
+
+  // position it
+  if (RefPtr<nsStyledElement> positioningShadowStyledElement =
+          nsStyledElement::FromNode(mPositioningShadow.get())) {
+    nsresult rv;
+    rv = CSSEditUtils::SetCSSPropertyPixelsWithoutTransaction(
+        *positioningShadowStyledElement, *nsGkAtoms::width,
+        mPositionedObjectWidth);
+    if (rv == NS_ERROR_EDITOR_DESTROYED) {
+      NS_WARNING(
+          "CSSEditUtils::SetCSSPropertyPixelsWithoutTransaction("
+          "nsGkAtoms::width) destroyed the editor");
+      return NS_ERROR_EDITOR_DESTROYED;
+    }
+    NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
+                         "CSSEditUtils::SetCSSPropertyPixelsWithoutTransaction("
+                         "nsGkAtoms::width) failed, but ignored");
+    rv = CSSEditUtils::SetCSSPropertyPixelsWithoutTransaction(
+        *positioningShadowStyledElement, *nsGkAtoms::height,
+        mPositionedObjectHeight);
+    if (rv == NS_ERROR_EDITOR_DESTROYED) {
+      NS_WARNING(
+          "CSSEditUtils::SetCSSPropertyPixelsWithoutTransaction("
+          "nsGkAtoms::height) destroyed the editor");
+      return NS_ERROR_EDITOR_DESTROYED;
+    }
+    NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
+                         "CSSEditUtils::SetCSSPropertyPixelsWithoutTransaction("
+                         "nsGkAtoms::height) failed, but ignored");
+  }
+
+  mIsMoving = true;
+  return NS_OK;  // XXX Looks like nobody refers this result
+}
+
+void HTMLEditor::SnapToGrid(int32_t& newX, int32_t& newY) const {
+  if (mSnapToGridEnabled && mGridSize) {
+    newX = (int32_t)floor(((float)newX / (float)mGridSize) + 0.5f) * mGridSize;
+    newY = (int32_t)floor(((float)newY / (float)mGridSize) + 0.5f) * mGridSize;
+  }
+}
+
+nsresult HTMLEditor::GrabberClicked() {
+  if (NS_WARN_IF(!mEventListener)) {
+    return NS_ERROR_NOT_INITIALIZED;
+  }
+  nsresult rv = static_cast<HTMLEditorEventListener*>(mEventListener.get())
+                    ->ListenToMouseMoveEventForGrabber(true);
+  if (NS_FAILED(rv)) {
+    NS_WARNING(
+        "HTMLEditorEventListener::ListenToMouseMoveEventForGrabber(true) "
+        "failed, but ignored");
+    return NS_OK;
+  }
+  mGrabberClicked = true;
+  return NS_OK;
+}
+
+nsresult HTMLEditor::EndMoving() {
+  if (mPositioningShadow) {
+    RefPtr<PresShell> presShell = GetPresShell();
+    if (NS_WARN_IF(!presShell)) {
+      return NS_ERROR_NOT_INITIALIZED;
+    }
+
+    DeleteRefToAnonymousNode(std::move(mPositioningShadow), presShell);
+
+    mPositioningShadow = nullptr;
+  }
+
+  if (mEventListener) {
+    DebugOnly<nsresult> rvIgnored =
+        static_cast<HTMLEditorEventListener*>(mEventListener.get())
+            ->ListenToMouseMoveEventForGrabber(false);
+    NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
+                         "HTMLEditorEventListener::"
+                         "ListenToMouseMoveEventForGrabber(false) failed");
+  }
+
+  mGrabberClicked = false;
+  mIsMoving = false;
+  nsresult rv = RefreshEditingUI();
+  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
+                       "HTMLEditor::RefreshEditingUI() failed");
+  return rv;
+}
+
+nsresult HTMLEditor::SetFinalPosition(int32_t aX, int32_t aY) {
+  MOZ_ASSERT(IsEditActionDataAvailable());
+
+  nsresult rv = EndMoving();
+  if (NS_FAILED(rv)) {
+    NS_WARNING("HTMLEditor::EndMoving() failed");
+    return rv;
+  }
+
+  // we have now to set the new width and height of the resized object
+  // we don't set the x and y position because we don't control that in
+  // a normal HTML layout
+  int32_t newX = mPositionedObjectX + aX - mOriginalX -
+                 (mPositionedObjectBorderLeft + mPositionedObjectMarginLeft);
+  int32_t newY = mPositionedObjectY + aY - mOriginalY -
+                 (mPositionedObjectBorderTop + mPositionedObjectMarginTop);
+
+  SnapToGrid(newX, newY);
+
+  nsAutoString x, y;
+  x.AppendInt(newX);
+  y.AppendInt(newY);
+
+  // we want one transaction only from a user's point of view
+  AutoPlaceholderBatch treatAsOneTransaction(
+      *this, ScrollSelectionIntoView::Yes, __FUNCTION__);
+
+  if (NS_WARN_IF(!mAbsolutelyPositionedObject)) {
+    return NS_ERROR_FAILURE;
+  }
+  if (RefPtr<nsStyledElement> styledAbsolutelyPositionedElement =
+          nsStyledElement::FromNode(mAbsolutelyPositionedObject)) {
+    nsresult rv;
+    rv = CSSEditUtils::SetCSSPropertyPixelsWithTransaction(
+        *this, *styledAbsolutelyPositionedElement, *nsGkAtoms::top, newY);
+    if (rv == NS_ERROR_EDITOR_DESTROYED) {
+      NS_WARNING(
+          "CSSEditUtils::SetCSSPropertyPixelsWithTransaction(nsGkAtoms::top) "
+          "destroyed the editor");
+      return NS_ERROR_EDITOR_DESTROYED;
+    }
+    NS_WARNING_ASSERTION(
+        NS_SUCCEEDED(rv),
+        "CSSEditUtils::SetCSSPropertyPixelsWithTransaction(nsGkAtoms::top) "
+        "failed, but ignored");
+    rv = CSSEditUtils::SetCSSPropertyPixelsWithTransaction(
+        *this, *styledAbsolutelyPositionedElement, *nsGkAtoms::left, newX);
+    if (rv == NS_ERROR_EDITOR_DESTROYED) {
+      NS_WARNING(
+          "CSSEditUtils::SetCSSPropertyPixelsWithTransaction(nsGkAtoms::left) "
+          "destroyed the editor");
+      return NS_ERROR_EDITOR_DESTROYED;
+    }
+    NS_WARNING_ASSERTION(
+        NS_SUCCEEDED(rv),
+        "CSSEditUtils::SetCSSPropertyPixelsWithTransaction(nsGkAtoms::left) "
+        "failed, but ignored");
+  }
+  // keep track of that size
+  mPositionedObjectX = newX;
+  mPositionedObjectY = newY;
+
+  rv = RefreshResizersInternal();
+  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
+                       "HTMLEditor::RefreshResizersInternal() failed");
+  return rv;
+}
+
+nsresult HTMLEditor::SetPositionToAbsoluteOrStatic(Element& aElement,
+                                                   bool aEnabled) {
+  nsAutoString positionValue;
+  DebugOnly<nsresult> rvIgnored = CSSEditUtils::GetComputedProperty(
+      aElement, *nsGkAtoms::position, positionValue);
+  NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
+                       "CSSEditUtils::GetComputedProperty(nsGkAtoms::position) "
+                       "failed, but ignored");
+  // nothing to do if the element is already in the state we want
+  if (positionValue.EqualsLiteral("absolute") == aEnabled) {
+    return NS_OK;
+  }
+
+  if (aEnabled) {
+    nsresult rv = SetPositionToAbsolute(aElement);
+    NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
+                         "HTMLEditor::SetPositionToAbsolute() failed");
+    return rv;
+  }
+
+  nsresult rv = SetPositionToStatic(aElement);
+  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
+                       "HTMLEditor::SetPositionToStatic() failed");
+  return rv;
+}
+
+nsresult HTMLEditor::SetPositionToAbsolute(Element& aElement) {
+  MOZ_ASSERT(IsEditActionDataAvailable());
+
+  AutoPlaceholderBatch treatAsOneTransaction(
+      *this, ScrollSelectionIntoView::Yes, __FUNCTION__);
+
+  int32_t x, y;
+  DebugOnly<nsresult> rvIgnored = GetElementOrigin(aElement, x, y);
+  NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
+                       "HTMLEditor::GetElementOrigin() failed, but ignored");
+
+  nsStyledElement* styledElement = nsStyledElement::FromNode(&aElement);
+  if (styledElement) {
+    // MOZ_KnownLive(*styledElement): aElement's lifetime must be guarantted
+    // by the caller because of MOZ_CAN_RUN_SCRIPT method.
+    nsresult rv = CSSEditUtils::SetCSSPropertyWithTransaction(
+        *this, MOZ_KnownLive(*styledElement), *nsGkAtoms::position,
+        u"absolute"_ns);
+    if (rv == NS_ERROR_EDITOR_DESTROYED) {
+      NS_WARNING(
+          "CSSEditUtils::SetCSSProperyWithTransaction(nsGkAtoms::Position) "
+          "destroyed the editor");
+      return NS_ERROR_EDITOR_DESTROYED;
+    }
+    NS_WARNING_ASSERTION(
+        NS_SUCCEEDED(rvIgnored),
+        "CSSEditUtils::SetCSSPropertyWithTransaction(nsGkAtoms::position, "
+        "absolute) failed, but ignored");
+  }
+
+  SnapToGrid(x, y);
+  if (styledElement) {
+    // MOZ_KnownLive(*styledElement): aElement's lifetime must be guarantted
+    // by the caller because of MOZ_CAN_RUN_SCRIPT method.
+    nsresult rv =
+        SetTopAndLeftWithTransaction(MOZ_KnownLive(*styledElement), x, y);
+    if (NS_FAILED(rv)) {
+      NS_WARNING("HTMLEditor::SetTopAndLeftWithTransaction() failed");
+      return rv;
+    }
+  }
+
+  // we may need to create a br if the positioned element is alone in its
+  // container
+  nsINode* parentNode = aElement.GetParentNode();
+  if (parentNode->GetChildCount() != 1) {
+    return NS_OK;
+  }
+  Result<CreateElementResult, nsresult> insertBRElementResult =
+      InsertBRElement(WithTransaction::Yes, EditorDOMPoint(parentNode, 0u));
+  if (MOZ_UNLIKELY(insertBRElementResult.isErr())) {
+    NS_WARNING("HTMLEditor::InsertBRElement(WithTransaction::Yes) failed");
+    return insertBRElementResult.unwrapErr();
+  }
+  // XXX Is this intentional selection change?
+  nsresult rv = insertBRElementResult.inspect().SuggestCaretPointTo(
+      *this, {SuggestCaret::OnlyIfHasSuggestion,
+              SuggestCaret::OnlyIfTransactionsAllowedToDoIt});
+  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
+                       "CreateElementResult::SuggestCaretPointTo() failed");
+  MOZ_ASSERT(insertBRElementResult.inspect().GetNewNode());
+  return rv;
+}
+
+nsresult HTMLEditor::SetPositionToStatic(Element& aElement) {
+  nsStyledElement* styledElement = nsStyledElement::FromNode(&aElement);
+  if (NS_WARN_IF(!styledElement)) {
+    return NS_ERROR_INVALID_ARG;
+  }
+
+  AutoPlaceholderBatch treatAsOneTransaction(
+      *this, ScrollSelectionIntoView::Yes, __FUNCTION__);
+
+  nsresult rv;
+  // MOZ_KnownLive(*styledElement): aElement's lifetime must be guarantted
+  // by the caller because of MOZ_CAN_RUN_SCRIPT method.
+  rv = CSSEditUtils::RemoveCSSPropertyWithTransaction(
+      *this, MOZ_KnownLive(*styledElement), *nsGkAtoms::position, u""_ns);
+  if (rv == NS_ERROR_EDITOR_DESTROYED) {
+    NS_WARNING(
+        "CSSEditUtils::RemoveCSSPropertyWithTransaction(nsGkAtoms::position) "
+        "destroyed the editor");
+    return NS_ERROR_EDITOR_DESTROYED;
+  }
+  NS_WARNING_ASSERTION(
+      NS_SUCCEEDED(rv),
+      "CSSEditUtils::RemoveCSSPropertyWithTransaction(nsGkAtoms::position) "
+      "failed, but ignored");
+  // MOZ_KnownLive(*styledElement): aElement's lifetime must be guarantted
+  // by the caller because of MOZ_CAN_RUN_SCRIPT method.
+  rv = CSSEditUtils::RemoveCSSPropertyWithTransaction(
+      *this, MOZ_KnownLive(*styledElement), *nsGkAtoms::top, u""_ns);
+  if (rv == NS_ERROR_EDITOR_DESTROYED) {
+    NS_WARNING(
+        "CSSEditUtils::RemoveCSSPropertyWithTransaction(nsGkAtoms::top) "
+        "destroyed the editor");
+    return NS_ERROR_EDITOR_DESTROYED;
+  }
+  NS_WARNING_ASSERTION(
+      NS_SUCCEEDED(rv),
+      "CSSEditUtils::RemoveCSSPropertyWithTransaction(nsGkAtoms::top) "
+      "failed, but ignored");
+  // MOZ_KnownLive(*styledElement): aElement's lifetime must be guarantted
+  // by the caller because of MOZ_CAN_RUN_SCRIPT method.
+  rv = CSSEditUtils::RemoveCSSPropertyWithTransaction(
+      *this, MOZ_KnownLive(*styledElement), *nsGkAtoms::left, u""_ns);
+  if (rv == NS_ERROR_EDITOR_DESTROYED) {
+    NS_WARNING(
+        "CSSEditUtils::RemoveCSSPropertyWithTransaction(nsGkAtoms::left) "
+        "destroyed the editor");
+    return NS_ERROR_EDITOR_DESTROYED;
+  }
+  NS_WARNING_ASSERTION(
+      NS_SUCCEEDED(rv),
+      "CSSEditUtils::RemoveCSSPropertyWithTransaction(nsGkAtoms::left) "
+      "failed, but ignored");
+  // MOZ_KnownLive(*styledElement): aElement's lifetime must be guarantted
+  // by the caller because of MOZ_CAN_RUN_SCRIPT method.
+  rv = CSSEditUtils::RemoveCSSPropertyWithTransaction(
+      *this, MOZ_KnownLive(*styledElement), *nsGkAtoms::z_index, u""_ns);
+  if (rv == NS_ERROR_EDITOR_DESTROYED) {
+    NS_WARNING(
+        "CSSEditUtils::RemoveCSSPropertyWithTransaction(nsGkAtoms::z_index) "
+        "destroyed the editor");
+    return NS_ERROR_EDITOR_DESTROYED;
+  }
+  NS_WARNING_ASSERTION(
+      NS_SUCCEEDED(rv),
+      "CSSEditUtils::RemoveCSSPropertyWithTransaction(nsGkAtoms::z_index) "
+      "failed, but ignored");
+
+  if (!HTMLEditUtils::IsImage(styledElement)) {
+    // MOZ_KnownLive(*styledElement): aElement's lifetime must be guarantted
+    // by the caller because of MOZ_CAN_RUN_SCRIPT method.
+    rv = CSSEditUtils::RemoveCSSPropertyWithTransaction(
+        *this, MOZ_KnownLive(*styledElement), *nsGkAtoms::width, u""_ns);
+    if (rv == NS_ERROR_EDITOR_DESTROYED) {
+      NS_WARNING(
+          "CSSEditUtils::RemoveCSSPropertyWithTransaction(nsGkAtoms::width) "
+          "destroyed the editor");
+      return NS_ERROR_EDITOR_DESTROYED;
+    }
+    NS_WARNING_ASSERTION(
+        NS_SUCCEEDED(rv),
+        "CSSEditUtils::RemoveCSSPropertyWithTransaction(nsGkAtoms::width) "
+        "failed, but ignored");
+    // MOZ_KnownLive(*styledElement): aElement's lifetime must be guarantted
+    // by the caller because of MOZ_CAN_RUN_SCRIPT method.
+    rv = CSSEditUtils::RemoveCSSPropertyWithTransaction(
+        *this, MOZ_KnownLive(*styledElement), *nsGkAtoms::height, u""_ns);
+    if (rv == NS_ERROR_EDITOR_DESTROYED) {
+      NS_WARNING(
+          "CSSEditUtils::RemoveCSSPropertyWithTransaction(nsGkAtoms::height) "
+          "destroyed the editor");
+      return NS_ERROR_EDITOR_DESTROYED;
+    }
+    NS_WARNING_ASSERTION(
+        NS_SUCCEEDED(rv),
+        "CSSEditUtils::RemoveCSSPropertyWithTransaction(nsGkAtoms::height) "
+        "failed, but ignored");
+  }
+
+  if (!styledElement->IsHTMLElement(nsGkAtoms::div) ||
+      HTMLEditor::HasStyleOrIdOrClassAttribute(*styledElement)) {
+    return NS_OK;
+  }
+
+  EditorDOMPoint pointToPutCaret;
+  // Make sure the first fild and last child of aElement starts/ends hard
+  // line(s) even after removing `aElement`.
+  {
+    // MOZ_KnownLive(*styledElement): aElement's lifetime must be guarantted
+    // by the caller because of MOZ_CAN_RUN_SCRIPT method.
+    Result<CreateElementResult, nsresult>
+        maybeInsertBRElementBeforeFirstChildResult =
+            EnsureHardLineBeginsWithFirstChildOf(MOZ_KnownLive(*styledElement));
+    if (MOZ_UNLIKELY(maybeInsertBRElementBeforeFirstChildResult.isErr())) {
+      NS_WARNING("HTMLEditor::EnsureHardLineBeginsWithFirstChildOf() failed");
+      return maybeInsertBRElementBeforeFirstChildResult.unwrapErr();
+    }
+    CreateElementResult unwrappedResult =
+        maybeInsertBRElementBeforeFirstChildResult.unwrap();
+    if (unwrappedResult.HasCaretPointSuggestion()) {
+      pointToPutCaret = unwrappedResult.UnwrapCaretPoint();
+    }
+  }
+  {
+    // MOZ_KnownLive(*styledElement): aElement's lifetime must be guarantted
+    // by the caller because of MOZ_CAN_RUN_SCRIPT method.
+    Result<CreateElementResult, nsresult>
+        maybeInsertBRElementAfterLastChildResult =
+            EnsureHardLineEndsWithLastChildOf(MOZ_KnownLive(*styledElement));
+    if (MOZ_UNLIKELY(maybeInsertBRElementAfterLastChildResult.isErr())) {
+      NS_WARNING("HTMLEditor::EnsureHardLineEndsWithLastChildOf() failed");
+      return maybeInsertBRElementAfterLastChildResult.unwrapErr();
+    }
+    CreateElementResult unwrappedResult =
+        maybeInsertBRElementAfterLastChildResult.unwrap();
+    if (unwrappedResult.HasCaretPointSuggestion()) {
+      pointToPutCaret = unwrappedResult.UnwrapCaretPoint();
+    }
+  }
+  {
+    // MOZ_KnownLive(*styledElement): aElement's lifetime must be guarantted
+    // by the caller because of MOZ_CAN_RUN_SCRIPT method.
+    Result<EditorDOMPoint, nsresult> unwrapStyledElementResult =
+        RemoveContainerWithTransaction(MOZ_KnownLive(*styledElement));
+    if (MOZ_UNLIKELY(unwrapStyledElementResult.isErr())) {
+      NS_WARNING("HTMLEditor::RemoveContainerWithTransaction() failed");
+      return unwrapStyledElementResult.unwrapErr();
+    }
+    if (unwrapStyledElementResult.inspect().IsSet()) {
+      pointToPutCaret = unwrapStyledElementResult.unwrap();
+    }
+  }
+  if (!AllowsTransactionsToChangeSelection() || !pointToPutCaret.IsSet()) {
+    return NS_OK;
+  }
+  rv = CollapseSelectionTo(pointToPutCaret);
+  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
+                       "EditorBase::CollapseSelectionTo() failed");
+  return rv;
+}
+
+NS_IMETHODIMP HTMLEditor::SetSnapToGridEnabled(bool aEnabled) {
+  mSnapToGridEnabled = aEnabled;
+  return NS_OK;
+}
+
+NS_IMETHODIMP HTMLEditor::GetSnapToGridEnabled(bool* aIsEnabled) {
+  *aIsEnabled = mSnapToGridEnabled;
+  return NS_OK;
+}
+
+NS_IMETHODIMP HTMLEditor::SetGridSize(uint32_t aSize) {
+  mGridSize = aSize;
+  return NS_OK;
+}
+
+NS_IMETHODIMP HTMLEditor::GetGridSize(uint32_t* aSize) {
+  *aSize = mGridSize;
+  return NS_OK;
+}
+
+nsresult HTMLEditor::SetTopAndLeftWithTransaction(
+    nsStyledElement& aStyledElement, int32_t aX, int32_t aY) {
+  AutoPlaceholderBatch treatAsOneTransaction(
+      *this, ScrollSelectionIntoView::Yes, __FUNCTION__);
+  nsresult rv;
+  rv = CSSEditUtils::SetCSSPropertyPixelsWithTransaction(*this, aStyledElement,
+                                                         *nsGkAtoms::left, aX);
+  if (rv == NS_ERROR_EDITOR_DESTROYED) {
+    NS_WARNING(
+        "CSSEditUtils::SetCSSPropertyPixelsWithTransaction(nsGkAtoms::left) "
+        "destroyed the editor");
+    return NS_ERROR_EDITOR_DESTROYED;
+  }
+  NS_WARNING_ASSERTION(
+      NS_SUCCEEDED(rv),
+      "CSSEditUtils::SetCSSPropertyPixelsWithTransaction(nsGkAtoms::left) "
+      "failed, but ignored");
+  rv = CSSEditUtils::SetCSSPropertyPixelsWithTransaction(*this, aStyledElement,
+                                                         *nsGkAtoms::top, aY);
+  if (rv == NS_ERROR_EDITOR_DESTROYED) {
+    NS_WARNING(
+        "CSSEditUtils::SetCSSPropertyPixelsWithTransaction(nsGkAtoms::top) "
+        "destroyed the editor");
+    return NS_ERROR_EDITOR_DESTROYED;
+  }
+  NS_WARNING_ASSERTION(
+      NS_SUCCEEDED(rv),
+      "CSSEditUtils::SetCSSPropertyPixelsWithTransaction(nsGkAtoms::top) "
+      "failed, but ignored");
+  return NS_OK;
+}
+
+nsresult HTMLEditor::GetTemporaryStyleForFocusedPositionedElement(
+    Element& aElement, nsAString& aReturn) {
+  // we are going to outline the positioned element and bring it to the
+  // front to overlap any other element intersecting with it. But
+  // first, let's see what's the background and foreground colors of the
+  // positioned element.
+  // if background-image computed value is 'none,
+  //   If the background color is 'auto' and R G B values of the foreground are
+  //       each above #d0, use a black background
+  //   If the background color is 'auto' and at least one of R G B values of
+  //       the foreground is below #d0, use a white background
+  // Otherwise don't change background/foreground
+  aReturn.Truncate();
+
+  nsAutoString backgroundImageValue;
+  nsresult rv = CSSEditUtils::GetComputedProperty(
+      aElement, *nsGkAtoms::background_image, backgroundImageValue);
+  if (NS_FAILED(rv)) {
+    NS_WARNING(
+        "CSSEditUtils::GetComputedProperty(nsGkAtoms::background_image) "
+        "failed");
+    return rv;
+  }
+  if (!backgroundImageValue.EqualsLiteral("none")) {
+    return NS_OK;
+  }
+
+  nsAutoString backgroundColorValue;
+  rv = CSSEditUtils::GetComputedProperty(aElement, *nsGkAtoms::backgroundColor,
+                                         backgroundColorValue);
+  if (NS_FAILED(rv)) {
+    NS_WARNING(
+        "CSSEditUtils::GetComputedProperty(nsGkAtoms::backgroundColor) "
+        "failed");
+    return rv;
+  }
+  if (!backgroundColorValue.EqualsLiteral("rgba(0, 0, 0, 0)")) {
+    return NS_OK;
+  }
+
+  RefPtr<const ComputedStyle> style =
+      nsComputedDOMStyle::GetComputedStyle(&aElement);
+  if (NS_WARN_IF(Destroyed())) {
+    return NS_ERROR_EDITOR_DESTROYED;
+  }
+  if (!style) {
+    NS_WARNING("nsComputedDOMStyle::GetComputedStyle() failed");
+    return NS_ERROR_FAILURE;
+  }
+
+  static const uint8_t kBlackBgTrigger = 0xd0;
+
+  auto color = style->StyleText()->mColor.ToColor();
+  if (NS_GET_R(color) >= kBlackBgTrigger &&
+      NS_GET_G(color) >= kBlackBgTrigger &&
+      NS_GET_B(color) >= kBlackBgTrigger) {
+    aReturn.AssignLiteral("black");
+  } else {
+    aReturn.AssignLiteral("white");
+  }
+
+  return NS_OK;
+}
+
+}  // namespace mozilla
author	Daniel Baumann <daniel.baumann@progress-linux.org>	2024-04-07 17:32:43 +0000
committer	Daniel Baumann <daniel.baumann@progress-linux.org>	2024-04-07 17:32:43 +0000
commit	6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch)
tree	a68f146d7fa01f0134297619fbe7e33db084e0aa /editor/libeditor/HTMLAbsPositionEditor.cpp
parent	Initial commit. (diff)
download	thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip