From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 21:33:14 +0200 Subject: Adding upstream version 115.7.0esr. Signed-off-by: Daniel Baumann --- dom/base/SelectionChangeEventDispatcher.cpp | 175 ++++++++++++++++++++++++++++ 1 file changed, 175 insertions(+) create mode 100644 dom/base/SelectionChangeEventDispatcher.cpp (limited to 'dom/base/SelectionChangeEventDispatcher.cpp') diff --git a/dom/base/SelectionChangeEventDispatcher.cpp b/dom/base/SelectionChangeEventDispatcher.cpp new file mode 100644 index 0000000000..a669c45d53 --- /dev/null +++ b/dom/base/SelectionChangeEventDispatcher.cpp @@ -0,0 +1,175 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* 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/. */ + +/* + * Implementation of mozilla::SelectionChangeEventDispatcher + */ + +#include "SelectionChangeEventDispatcher.h" + +#include "mozilla/AsyncEventDispatcher.h" +#include "mozilla/BasePrincipal.h" +#include "mozilla/IntegerRange.h" +#include "mozilla/StaticPrefs_dom.h" +#include "mozilla/dom/Document.h" +#include "mozilla/dom/Selection.h" +#include "nsCOMPtr.h" +#include "nsContentUtils.h" +#include "nsFrameSelection.h" +#include "nsRange.h" + +namespace mozilla { + +using namespace dom; + +SelectionChangeEventDispatcher::RawRangeData::RawRangeData( + const nsRange* aRange) { + if (aRange->IsPositioned()) { + mStartContainer = aRange->GetStartContainer(); + mEndContainer = aRange->GetEndContainer(); + mStartOffset = aRange->StartOffset(); + mEndOffset = aRange->EndOffset(); + } else { + mStartContainer = nullptr; + mEndContainer = nullptr; + mStartOffset = 0; + mEndOffset = 0; + } +} + +bool SelectionChangeEventDispatcher::RawRangeData::Equals( + const nsRange* aRange) { + if (!aRange->IsPositioned()) { + return !mStartContainer; + } + return mStartContainer == aRange->GetStartContainer() && + mEndContainer == aRange->GetEndContainer() && + mStartOffset == aRange->StartOffset() && + mEndOffset == aRange->EndOffset(); +} + +inline void ImplCycleCollectionTraverse( + nsCycleCollectionTraversalCallback& aCallback, + SelectionChangeEventDispatcher::RawRangeData& aField, const char* aName, + uint32_t aFlags = 0) { + ImplCycleCollectionTraverse(aCallback, aField.mStartContainer, + "mStartContainer", aFlags); + ImplCycleCollectionTraverse(aCallback, aField.mEndContainer, "mEndContainer", + aFlags); +} + +NS_IMPL_CYCLE_COLLECTION_CLASS(SelectionChangeEventDispatcher) + +NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(SelectionChangeEventDispatcher) + tmp->mOldRanges.Clear(); +NS_IMPL_CYCLE_COLLECTION_UNLINK_END + +NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(SelectionChangeEventDispatcher) + NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mOldRanges); +NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END + +void SelectionChangeEventDispatcher::OnSelectionChange(Document* aDoc, + Selection* aSel, + int16_t aReason) { + // Check if the ranges have actually changed + // Don't bother checking this if we are hiding changes. + if (mOldRanges.Length() == aSel->RangeCount() && + !aSel->IsBlockingSelectionChangeEvents()) { + bool changed = mOldDirection != aSel->GetDirection(); + if (!changed) { + for (const uint32_t i : IntegerRange(mOldRanges.Length())) { + if (!mOldRanges[i].Equals(aSel->GetRangeAt(i))) { + changed = true; + break; + } + } + } + + if (!changed) { + return; + } + } + + // The ranges have actually changed, update the mOldRanges array + mOldRanges.ClearAndRetainStorage(); + for (const uint32_t i : IntegerRange(aSel->RangeCount())) { + mOldRanges.AppendElement(RawRangeData(aSel->GetRangeAt(i))); + } + mOldDirection = aSel->GetDirection(); + + // If we are hiding changes, then don't do anything else. We do this after we + // update mOldRanges so that changes after the changes stop being hidden don't + // incorrectly trigger a change, even though they didn't change anything + if (aSel->IsBlockingSelectionChangeEvents()) { + return; + } + + const Document* doc = aSel->GetParentObject(); + if (MOZ_UNLIKELY(!doc)) { + return; + } + const nsPIDOMWindowInner* inner = doc->GetInnerWindow(); + if (MOZ_UNLIKELY(!inner)) { + return; + } + const bool maybeHasSelectionChangeEventListeners = + !inner || inner->HasSelectionChangeEventListeners(); + const bool maybeHasFormSelectEventListeners = + !inner || inner->HasFormSelectEventListeners(); + if (!maybeHasSelectionChangeEventListeners && + !maybeHasFormSelectEventListeners) { + return; + } + + // Be aware, don't call GetTextControlFromSelectionLimiter once you might + // run script because selection limit may have already been changed by it. + nsCOMPtr textControl; + if ((maybeHasFormSelectEventListeners && + (aReason & nsISelectionListener::JS_REASON)) || + maybeHasSelectionChangeEventListeners) { + if (const nsFrameSelection* fs = aSel->GetFrameSelection()) { + if (nsCOMPtr root = fs->GetLimiter()) { + textControl = root->GetClosestNativeAnonymousSubtreeRootParentOrHost(); + MOZ_ASSERT_IF(textControl, + textControl->IsTextControlElement() && + !textControl->IsInNativeAnonymousSubtree()); + } + } + }; + + // Selection changes with non-JS reason only cares about whether the new + // selection is collapsed or not. See TextInputListener::OnSelectionChange. + if (textControl && maybeHasFormSelectEventListeners && + (aReason & nsISelectionListener::JS_REASON)) { + RefPtr asyncDispatcher = + new AsyncEventDispatcher(textControl, eFormSelect, CanBubble::eYes); + asyncDispatcher->PostDOMEvent(); + } + + if (!maybeHasSelectionChangeEventListeners) { + return; + } + + // The spec currently doesn't say that we should dispatch this event on text + // controls, so for now we only support doing that under a pref, disabled by + // default. + // See https://github.com/w3c/selection-api/issues/53. + if (textControl && + !StaticPrefs::dom_select_events_textcontrols_selectionchange_enabled()) { + return; + } + + nsINode* target = + textControl ? static_cast(textControl.get()) : aDoc; + if (target) { + CanBubble canBubble = textControl ? CanBubble::eYes : CanBubble::eNo; + RefPtr asyncDispatcher = + new AsyncEventDispatcher(target, eSelectionChange, canBubble); + asyncDispatcher->PostDOMEvent(); + } +} + +} // namespace mozilla -- cgit v1.2.3