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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /layout/base/nsFrameManager.cpp
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'layout/base/nsFrameManager.cpp')
-rw-r--r--layout/base/nsFrameManager.cpp250
1 files changed, 250 insertions, 0 deletions
diff --git a/layout/base/nsFrameManager.cpp b/layout/base/nsFrameManager.cpp
new file mode 100644
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+++ b/layout/base/nsFrameManager.cpp
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+/* -*- 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/. */
+
+/* storage of the frame tree and information about it */
+
+#include "nsFrameManager.h"
+
+#include "nscore.h"
+#include "nsCOMPtr.h"
+#include "plhash.h"
+#include "nsPlaceholderFrame.h"
+#include "nsGkAtoms.h"
+#include "nsILayoutHistoryState.h"
+#include "mozilla/PresShell.h"
+#include "mozilla/PresState.h"
+#include "mozilla/ComputedStyle.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/Document.h"
+
+#include "nsError.h"
+#include "nsAbsoluteContainingBlock.h"
+#include "ChildIterator.h"
+
+#include "GeckoProfiler.h"
+#include "nsIStatefulFrame.h"
+#include "nsContainerFrame.h"
+#include "nsWindowSizes.h"
+
+#include "mozilla/MemoryReporting.h"
+
+// #define DEBUG_UNDISPLAYED_MAP
+// #define DEBUG_DISPLAY_CONTENTS_MAP
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+//----------------------------------------------------------------------
+
+nsFrameManager::~nsFrameManager() {
+ NS_ASSERTION(!mPresShell, "nsFrameManager::Destroy never called");
+}
+
+void nsFrameManager::Destroy() {
+ NS_ASSERTION(mPresShell, "Frame manager already shut down.");
+
+ // Destroy the frame hierarchy.
+ mPresShell->SetIgnoreFrameDestruction(true);
+
+ if (mRootFrame) {
+ FrameDestroyContext context(mPresShell);
+ mRootFrame->Destroy(context);
+ mRootFrame = nullptr;
+ }
+
+ mPresShell = nullptr;
+}
+
+//----------------------------------------------------------------------
+void nsFrameManager::AppendFrames(nsContainerFrame* aParentFrame,
+ FrameChildListID aListID,
+ nsFrameList&& aFrameList) {
+ if (aParentFrame->IsAbsoluteContainer() &&
+ aListID == aParentFrame->GetAbsoluteListID()) {
+ aParentFrame->GetAbsoluteContainingBlock()->AppendFrames(
+ aParentFrame, aListID, std::move(aFrameList));
+ } else {
+ aParentFrame->AppendFrames(aListID, std::move(aFrameList));
+ }
+}
+
+void nsFrameManager::InsertFrames(nsContainerFrame* aParentFrame,
+ FrameChildListID aListID,
+ nsIFrame* aPrevFrame,
+ nsFrameList&& aFrameList) {
+ MOZ_ASSERT(
+ !aPrevFrame ||
+ (!aPrevFrame->GetNextContinuation() ||
+ (aPrevFrame->GetNextContinuation()->HasAnyStateBits(
+ NS_FRAME_IS_OVERFLOW_CONTAINER) &&
+ !aPrevFrame->HasAnyStateBits(NS_FRAME_IS_OVERFLOW_CONTAINER))),
+ "aPrevFrame must be the last continuation in its chain!");
+
+ if (aParentFrame->IsAbsoluteContainer() &&
+ aListID == aParentFrame->GetAbsoluteListID()) {
+ aParentFrame->GetAbsoluteContainingBlock()->InsertFrames(
+ aParentFrame, aListID, aPrevFrame, std::move(aFrameList));
+ } else {
+ aParentFrame->InsertFrames(aListID, aPrevFrame, nullptr,
+ std::move(aFrameList));
+ }
+}
+
+void nsFrameManager::RemoveFrame(DestroyContext& aContext,
+ FrameChildListID aListID,
+ nsIFrame* aOldFrame) {
+ // In case the reflow doesn't invalidate anything since it just leaves
+ // a gap where the old frame was, we invalidate it here. (This is
+ // reasonably likely to happen when removing a last child in a way
+ // that doesn't change the size of the parent.)
+ // This has to sure to invalidate the entire overflow rect; this
+ // is important in the presence of absolute positioning
+ aOldFrame->InvalidateFrameForRemoval();
+
+ NS_ASSERTION(!aOldFrame->GetPrevContinuation() ||
+ // exception for
+ // nsCSSFrameConstructor::RemoveFloatingFirstLetterFrames
+ aOldFrame->IsTextFrame(),
+ "Must remove first continuation.");
+ NS_ASSERTION(!(aOldFrame->HasAnyStateBits(NS_FRAME_OUT_OF_FLOW) &&
+ aOldFrame->GetPlaceholderFrame()),
+ "Must call RemoveFrame on placeholder for out-of-flows.");
+ nsContainerFrame* parentFrame = aOldFrame->GetParent();
+ if (parentFrame->IsAbsoluteContainer() &&
+ aListID == parentFrame->GetAbsoluteListID()) {
+ parentFrame->GetAbsoluteContainingBlock()->RemoveFrame(aContext, aListID,
+ aOldFrame);
+ } else {
+ parentFrame->RemoveFrame(aContext, aListID, aOldFrame);
+ }
+}
+
+//----------------------------------------------------------------------
+
+// Capture state for a given frame.
+// Accept a content id here, in some cases we may not have content (scroll
+// position)
+void nsFrameManager::CaptureFrameStateFor(nsIFrame* aFrame,
+ nsILayoutHistoryState* aState) {
+ if (!aFrame || !aState) {
+ NS_WARNING("null frame, or state");
+ return;
+ }
+
+ // Only capture state for stateful frames
+ nsIStatefulFrame* statefulFrame = do_QueryFrame(aFrame);
+ if (!statefulFrame) {
+ return;
+ }
+
+ // Capture the state, exit early if we get null (nothing to save)
+ UniquePtr<PresState> frameState = statefulFrame->SaveState();
+ if (!frameState) {
+ return;
+ }
+
+ // Generate the hash key to store the state under
+ // Exit early if we get empty key
+ nsAutoCString stateKey;
+ nsIContent* content = aFrame->GetContent();
+ Document* doc = content ? content->GetUncomposedDoc() : nullptr;
+ statefulFrame->GenerateStateKey(content, doc, stateKey);
+ if (stateKey.IsEmpty()) {
+ return;
+ }
+
+ // Store the state. aState owns frameState now.
+ aState->AddState(stateKey, std::move(frameState));
+}
+
+void nsFrameManager::CaptureFrameState(nsIFrame* aFrame,
+ nsILayoutHistoryState* aState) {
+ MOZ_ASSERT(nullptr != aFrame && nullptr != aState,
+ "null parameters passed in");
+
+ CaptureFrameStateFor(aFrame, aState);
+
+ // Now capture state recursively for the frame hierarchy rooted at aFrame
+ for (const auto& childList : aFrame->ChildLists()) {
+ for (nsIFrame* child : childList.mList) {
+ if (child->HasAnyStateBits(NS_FRAME_OUT_OF_FLOW)) {
+ // We'll pick it up when we get to its placeholder
+ continue;
+ }
+ // Make sure to walk through placeholders as needed, so that we
+ // save state for out-of-flows which may not be our descendants
+ // themselves but whose placeholders are our descendants.
+ CaptureFrameState(nsPlaceholderFrame::GetRealFrameFor(child), aState);
+ }
+ }
+}
+
+// Restore state for a given frame.
+// Accept a content id here, in some cases we may not have content (scroll
+// position)
+void nsFrameManager::RestoreFrameStateFor(nsIFrame* aFrame,
+ nsILayoutHistoryState* aState) {
+ if (!aFrame || !aState) {
+ NS_WARNING("null frame or state");
+ return;
+ }
+
+ // Only restore state for stateful frames
+ nsIStatefulFrame* statefulFrame = do_QueryFrame(aFrame);
+ if (!statefulFrame) {
+ return;
+ }
+
+ // Generate the hash key the state was stored under
+ // Exit early if we get empty key
+ nsIContent* content = aFrame->GetContent();
+ // If we don't have content, we can't generate a hash
+ // key and there's probably no state information for us.
+ if (!content) {
+ return;
+ }
+
+ nsAutoCString stateKey;
+ Document* doc = content->GetUncomposedDoc();
+ statefulFrame->GenerateStateKey(content, doc, stateKey);
+ if (stateKey.IsEmpty()) {
+ return;
+ }
+
+ // Get the state from the hash
+ PresState* frameState = aState->GetState(stateKey);
+ if (!frameState) {
+ return;
+ }
+
+ // Restore it
+ nsresult rv = statefulFrame->RestoreState(frameState);
+ if (NS_FAILED(rv)) {
+ return;
+ }
+
+ // If we restore ok, remove the state from the state table
+ aState->RemoveState(stateKey);
+}
+
+void nsFrameManager::RestoreFrameState(nsIFrame* aFrame,
+ nsILayoutHistoryState* aState) {
+ MOZ_ASSERT(nullptr != aFrame && nullptr != aState,
+ "null parameters passed in");
+
+ RestoreFrameStateFor(aFrame, aState);
+
+ // Now restore state recursively for the frame hierarchy rooted at aFrame
+ for (const auto& childList : aFrame->ChildLists()) {
+ for (nsIFrame* child : childList.mList) {
+ RestoreFrameState(child, aState);
+ }
+ }
+}
+
+void nsFrameManager::AddSizeOfIncludingThis(nsWindowSizes& aSizes) const {
+ aSizes.mLayoutPresShellSize += aSizes.mState.mMallocSizeOf(this);
+}