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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 https://mozilla.org/MPL/2.0/. */
#include "ChromeObserver.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/DocumentInlines.h"
#include "mozilla/dom/Element.h"
#include "nsContentUtils.h"
#include "nsIBaseWindow.h"
#include "nsIFrame.h"
#include "nsIMutationObserver.h"
#include "nsIWidget.h"
#include "nsPresContext.h"
#include "nsXULElement.h"
namespace mozilla::dom {
NS_IMPL_ISUPPORTS(ChromeObserver, nsIMutationObserver)
ChromeObserver::ChromeObserver(Document* aDocument)
: nsStubMutationObserver(), mDocument(aDocument) {}
ChromeObserver::~ChromeObserver() = default;
void ChromeObserver::Init() {
mDocument->AddMutationObserver(this);
Element* rootElement = mDocument->GetRootElement();
if (!rootElement) {
return;
}
nsAutoScriptBlocker scriptBlocker;
uint32_t attributeCount = rootElement->GetAttrCount();
for (uint32_t i = 0; i < attributeCount; i++) {
BorrowedAttrInfo info = rootElement->GetAttrInfoAt(i);
const nsAttrName* name = info.mName;
if (name->LocalName() == nsGkAtoms::customtitlebar) {
// Some linux windows managers have an issue when the customtitlebar is
// applied while the browser is loading (bug 1598848). For now, skip
// applying this attribute when initializing.
continue;
}
AttributeChanged(rootElement, name->NamespaceID(), name->LocalName(),
AttrModType::Addition, nullptr);
}
}
nsIWidget* ChromeObserver::GetWindowWidget() {
// only top level chrome documents can set the titlebar color
if (mDocument && mDocument->IsRootDisplayDocument()) {
nsCOMPtr<nsISupports> container = mDocument->GetContainer();
if (nsCOMPtr<nsIBaseWindow> baseWindow = do_QueryInterface(container)) {
nsCOMPtr<nsIWidget> mainWidget = baseWindow->GetMainWidget();
return mainWidget;
}
}
return nullptr;
}
void ChromeObserver::SetHideTitlebarSeparator(bool aState) {
nsIWidget* mainWidget = GetWindowWidget();
if (mainWidget) {
// We can do this synchronously because SetHideTitlebarSeparator doesn't
// have any synchronous effects apart from a harmless invalidation.
mainWidget->SetHideTitlebarSeparator(aState);
}
}
void ChromeObserver::AttributeChanged(dom::Element* aElement,
int32_t aNamespaceID, nsAtom* aName,
AttrModType aModType,
const nsAttrValue* aOldValue) {
// We only care about changes to the root element.
if (!mDocument || aElement != mDocument->GetRootElement()) {
return;
}
if (IsAdditionOrRemoval(aModType)) {
const bool added = aModType == AttrModType::Addition;
if (aName == nsGkAtoms::hidechrome) {
HideWindowChrome(added);
} else if (aName == nsGkAtoms::customtitlebar) {
SetCustomTitlebar(added);
} else if (aName == nsGkAtoms::hidetitlebarseparator) {
SetHideTitlebarSeparator(added);
} else if (aName == nsGkAtoms::windowsmica) {
SetMica(added);
}
}
if (aName == nsGkAtoms::localedir) {
// if the localedir changed on the root element, reset the document
// direction
mDocument->ResetDocumentDirection();
}
if (aName == nsGkAtoms::title && aModType != AttrModType::Removal) {
mDocument->NotifyPossibleTitleChange(false);
}
}
void ChromeObserver::NodeWillBeDestroyed(nsINode* aNode) {
mDocument = nullptr;
}
void ChromeObserver::SetMica(bool aEnable) {
if (nsIWidget* mainWidget = GetWindowWidget()) {
mainWidget->SetMicaBackdrop(aEnable);
}
}
void ChromeObserver::SetCustomTitlebar(bool aCustomTitlebar) {
if (nsIWidget* mainWidget = GetWindowWidget()) {
// SetCustomTitlebar can dispatch native events, hence doing it off a
// script runner
nsContentUtils::AddScriptRunner(NewRunnableMethod<bool>(
"SetCustomTitlebar", mainWidget, &nsIWidget::SetCustomTitlebar,
aCustomTitlebar));
}
}
void ChromeObserver::HideWindowChrome(bool aShouldHide) {
if (nsCOMPtr<nsIWidget> mainWidget = GetWindowWidget()) {
mainWidget->HideWindowChrome(aShouldHide);
}
}
} // namespace mozilla::dom
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