mirror of
https://github.com/classilla/tenfourfox.git
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792 lines
23 KiB
C++
792 lines
23 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsNativeTheme.h"
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#include "nsIWidget.h"
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#include "nsIDocument.h"
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#include "nsIContent.h"
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#include "nsIFrame.h"
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#include "nsIPresShell.h"
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#include "nsNumberControlFrame.h"
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#include "nsPresContext.h"
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#include "nsString.h"
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#include "nsNameSpaceManager.h"
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#include "nsIDOMHTMLInputElement.h"
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#include "nsIDOMXULMenuListElement.h"
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#include "nsThemeConstants.h"
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#include "nsIComponentManager.h"
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#include "nsPIDOMWindow.h"
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#include "nsProgressFrame.h"
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#include "nsMeterFrame.h"
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#include "nsMenuFrame.h"
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#include "nsRangeFrame.h"
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#include "nsCSSRendering.h"
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#include "mozilla/EventStates.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/HTMLBodyElement.h"
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#include "mozilla/dom/HTMLProgressElement.h"
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#include "nsIDocumentInlines.h"
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#include <algorithm>
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using namespace mozilla;
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using namespace mozilla::dom;
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nsNativeTheme::nsNativeTheme()
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: mAnimatedContentTimeout(UINT32_MAX)
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{
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}
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NS_IMPL_ISUPPORTS(nsNativeTheme, nsITimerCallback)
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nsIPresShell *
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nsNativeTheme::GetPresShell(nsIFrame* aFrame)
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{
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if (!aFrame)
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return nullptr;
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nsPresContext* context = aFrame->PresContext();
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return context ? context->GetPresShell() : nullptr;
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}
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EventStates
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nsNativeTheme::GetContentState(nsIFrame* aFrame, uint8_t aWidgetType)
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{
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if (!aFrame)
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return EventStates();
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bool isXULCheckboxRadio =
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(aWidgetType == NS_THEME_CHECKBOX ||
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aWidgetType == NS_THEME_RADIO) &&
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aFrame->GetContent()->IsXULElement();
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if (isXULCheckboxRadio)
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aFrame = aFrame->GetParent();
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if (!aFrame->GetContent())
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return EventStates();
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nsIPresShell *shell = GetPresShell(aFrame);
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if (!shell)
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return EventStates();
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nsIContent* frameContent = aFrame->GetContent();
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EventStates flags;
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if (frameContent->IsElement()) {
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flags = frameContent->AsElement()->State();
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// <input type=number> needs special handling since its nested native
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// anonymous <input type=text> takes focus for it.
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if (aWidgetType == NS_THEME_NUMBER_INPUT &&
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frameContent->IsHTMLElement(nsGkAtoms::input)) {
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nsNumberControlFrame *numberControlFrame = do_QueryFrame(aFrame);
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if (numberControlFrame && numberControlFrame->IsFocused()) {
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flags |= NS_EVENT_STATE_FOCUS;
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}
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}
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nsNumberControlFrame* numberControlFrame =
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nsNumberControlFrame::GetNumberControlFrameForSpinButton(aFrame);
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if (numberControlFrame &&
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numberControlFrame->GetContent()->AsElement()->State().
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HasState(NS_EVENT_STATE_DISABLED)) {
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flags |= NS_EVENT_STATE_DISABLED;
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}
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}
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if (isXULCheckboxRadio && aWidgetType == NS_THEME_RADIO) {
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if (IsFocused(aFrame))
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flags |= NS_EVENT_STATE_FOCUS;
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}
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// On Windows and Mac, only draw focus rings if they should be shown. This
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// means that focus rings are only shown once the keyboard has been used to
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// focus something in the window.
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#if defined(XP_MACOSX)
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// Mac always draws focus rings for textboxes and lists.
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if (aWidgetType == NS_THEME_NUMBER_INPUT ||
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aWidgetType == NS_THEME_TEXTFIELD ||
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aWidgetType == NS_THEME_TEXTFIELD_MULTILINE ||
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aWidgetType == NS_THEME_SEARCHFIELD ||
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aWidgetType == NS_THEME_LISTBOX) {
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return flags;
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}
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#endif
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#if defined(XP_WIN)
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// On Windows, focused buttons are always drawn as such by the native theme.
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if (aWidgetType == NS_THEME_BUTTON)
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return flags;
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#endif
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#if defined(XP_MACOSX) || defined(XP_WIN)
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nsIDocument* doc = aFrame->GetContent()->OwnerDoc();
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nsPIDOMWindow* window = doc->GetWindow();
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if (window && !window->ShouldShowFocusRing())
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flags &= ~NS_EVENT_STATE_FOCUS;
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#endif
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return flags;
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}
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/* static */
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bool
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nsNativeTheme::CheckBooleanAttr(nsIFrame* aFrame, nsIAtom* aAtom)
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{
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if (!aFrame)
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return false;
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nsIContent* content = aFrame->GetContent();
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if (!content)
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return false;
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if (content->IsHTMLElement())
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return content->HasAttr(kNameSpaceID_None, aAtom);
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// For XML/XUL elements, an attribute must be equal to the literal
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// string "true" to be counted as true. An empty string should _not_
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// be counted as true.
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return content->AttrValueIs(kNameSpaceID_None, aAtom,
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NS_LITERAL_STRING("true"), eCaseMatters);
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}
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/* static */
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int32_t
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nsNativeTheme::CheckIntAttr(nsIFrame* aFrame, nsIAtom* aAtom, int32_t defaultValue)
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{
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if (!aFrame)
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return defaultValue;
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nsAutoString attr;
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aFrame->GetContent()->GetAttr(kNameSpaceID_None, aAtom, attr);
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nsresult err;
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int32_t value = attr.ToInteger(&err);
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if (attr.IsEmpty() || NS_FAILED(err))
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return defaultValue;
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return value;
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}
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/* static */
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double
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nsNativeTheme::GetProgressValue(nsIFrame* aFrame)
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{
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// When we are using the HTML progress element,
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// we can get the value from the IDL property.
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if (aFrame && aFrame->GetContent()->IsHTMLElement(nsGkAtoms::progress)) {
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return static_cast<HTMLProgressElement*>(aFrame->GetContent())->Value();
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}
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return (double)nsNativeTheme::CheckIntAttr(aFrame, nsGkAtoms::value, 0);
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}
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/* static */
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double
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nsNativeTheme::GetProgressMaxValue(nsIFrame* aFrame)
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{
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// When we are using the HTML progress element,
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// we can get the max from the IDL property.
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if (aFrame && aFrame->GetContent()->IsHTMLElement(nsGkAtoms::progress)) {
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return static_cast<HTMLProgressElement*>(aFrame->GetContent())->Max();
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}
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return (double)std::max(nsNativeTheme::CheckIntAttr(aFrame, nsGkAtoms::max, 100), 1);
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}
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bool
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nsNativeTheme::GetCheckedOrSelected(nsIFrame* aFrame, bool aCheckSelected)
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{
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if (!aFrame)
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return false;
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nsIContent* content = aFrame->GetContent();
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if (content->IsXULElement()) {
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// For a XUL checkbox or radio button, the state of the parent determines
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// the checked state
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aFrame = aFrame->GetParent();
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} else {
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// Check for an HTML input element
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nsCOMPtr<nsIDOMHTMLInputElement> inputElt = do_QueryInterface(content);
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if (inputElt) {
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bool checked;
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inputElt->GetChecked(&checked);
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return checked;
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}
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}
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return CheckBooleanAttr(aFrame, aCheckSelected ? nsGkAtoms::selected
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: nsGkAtoms::checked);
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}
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bool
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nsNativeTheme::IsButtonTypeMenu(nsIFrame* aFrame)
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{
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if (!aFrame)
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return false;
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nsIContent* content = aFrame->GetContent();
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return content->AttrValueIs(kNameSpaceID_None, nsGkAtoms::type,
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NS_LITERAL_STRING("menu"), eCaseMatters);
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}
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bool
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nsNativeTheme::IsPressedButton(nsIFrame* aFrame)
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{
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EventStates eventState = GetContentState(aFrame, NS_THEME_TOOLBAR_BUTTON);
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if (IsDisabled(aFrame, eventState))
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return false;
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return IsOpenButton(aFrame) ||
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eventState.HasAllStates(NS_EVENT_STATE_ACTIVE | NS_EVENT_STATE_HOVER);
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}
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bool
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nsNativeTheme::GetIndeterminate(nsIFrame* aFrame)
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{
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if (!aFrame)
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return false;
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nsIContent* content = aFrame->GetContent();
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if (content->IsXULElement()) {
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// For a XUL checkbox or radio button, the state of the parent determines
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// the state
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return CheckBooleanAttr(aFrame->GetParent(), nsGkAtoms::indeterminate);
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}
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// Check for an HTML input element
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nsCOMPtr<nsIDOMHTMLInputElement> inputElt = do_QueryInterface(content);
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if (inputElt) {
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bool indeterminate;
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inputElt->GetIndeterminate(&indeterminate);
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return indeterminate;
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}
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return false;
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}
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// backout bug 672050
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bool
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nsNativeTheme::IsLastTab(nsIFrame* aFrame)
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{
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if (!aFrame)
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return false;
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while ((aFrame = aFrame->GetNextSibling())) {
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if (aFrame->GetRect().width > 0 && aFrame->GetContent()->NodeInfo()->NameAtom() == nsGkAtoms::tab)
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return false;
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}
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return true;
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}
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bool
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nsNativeTheme::IsWidgetStyled(nsPresContext* aPresContext, nsIFrame* aFrame,
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uint8_t aWidgetType)
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{
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// Check for specific widgets to see if HTML has overridden the style.
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if (!aFrame)
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return false;
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// Resizers have some special handling, dependent on whether in a scrollable
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// container or not. If so, use the scrollable container's to determine
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// whether the style is overriden instead of the resizer. This allows a
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// non-native transparent resizer to be used instead. Otherwise, we just
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// fall through and return false.
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if (aWidgetType == NS_THEME_RESIZER) {
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nsIFrame* parentFrame = aFrame->GetParent();
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if (parentFrame && parentFrame->GetType() == nsGkAtoms::scrollFrame) {
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// if the parent is a scrollframe, the resizer should be native themed
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// only if the scrollable area doesn't override the widget style.
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parentFrame = parentFrame->GetParent();
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if (parentFrame) {
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return IsWidgetStyled(aPresContext, parentFrame,
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parentFrame->StyleDisplay()->mAppearance);
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}
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}
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}
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/**
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* Progress bar appearance should be the same for the bar and the container
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* frame. nsProgressFrame owns the logic and will tell us what we should do.
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*/
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if (aWidgetType == NS_THEME_PROGRESSBAR_CHUNK ||
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aWidgetType == NS_THEME_PROGRESSBAR) {
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nsProgressFrame* progressFrame = do_QueryFrame(aWidgetType == NS_THEME_PROGRESSBAR_CHUNK
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? aFrame->GetParent() : aFrame);
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if (progressFrame) {
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return !progressFrame->ShouldUseNativeStyle();
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}
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}
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/**
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* Meter bar appearance should be the same for the bar and the container
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* frame. nsMeterFrame owns the logic and will tell us what we should do.
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*/
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if (aWidgetType == NS_THEME_METERBAR_CHUNK ||
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aWidgetType == NS_THEME_METERBAR) {
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nsMeterFrame* meterFrame = do_QueryFrame(aWidgetType == NS_THEME_METERBAR_CHUNK
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? aFrame->GetParent() : aFrame);
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if (meterFrame) {
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return !meterFrame->ShouldUseNativeStyle();
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}
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}
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/**
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* An nsRangeFrame and its children are treated atomically when it
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* comes to native theming (either all parts, or no parts, are themed).
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* nsRangeFrame owns the logic and will tell us what we should do.
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*/
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if (aWidgetType == NS_THEME_RANGE ||
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aWidgetType == NS_THEME_RANGE_THUMB) {
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nsRangeFrame* rangeFrame =
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do_QueryFrame(aWidgetType == NS_THEME_RANGE_THUMB
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? aFrame->GetParent() : aFrame);
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if (rangeFrame) {
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return !rangeFrame->ShouldUseNativeStyle();
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}
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}
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if (aWidgetType == NS_THEME_SPINNER_UP_BUTTON ||
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aWidgetType == NS_THEME_SPINNER_DOWN_BUTTON) {
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nsNumberControlFrame* numberControlFrame =
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nsNumberControlFrame::GetNumberControlFrameForSpinButton(aFrame);
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if (numberControlFrame) {
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return !numberControlFrame->ShouldUseNativeStyleForSpinner();
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}
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}
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return (aWidgetType == NS_THEME_NUMBER_INPUT ||
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aWidgetType == NS_THEME_BUTTON ||
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aWidgetType == NS_THEME_TEXTFIELD ||
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aWidgetType == NS_THEME_TEXTFIELD_MULTILINE ||
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aWidgetType == NS_THEME_LISTBOX ||
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aWidgetType == NS_THEME_DROPDOWN) &&
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aFrame->GetContent()->IsHTMLElement() &&
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aPresContext->HasAuthorSpecifiedRules(aFrame,
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NS_AUTHOR_SPECIFIED_BORDER |
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NS_AUTHOR_SPECIFIED_BACKGROUND);
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}
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bool
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nsNativeTheme::IsDisabled(nsIFrame* aFrame, EventStates aEventStates)
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{
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if (!aFrame) {
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return false;
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}
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nsIContent* content = aFrame->GetContent();
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if (!content) {
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return false;
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}
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if (content->IsHTMLElement()) {
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return aEventStates.HasState(NS_EVENT_STATE_DISABLED);
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}
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// For XML/XUL elements, an attribute must be equal to the literal
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// string "true" to be counted as true. An empty string should _not_
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// be counted as true.
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return content->AttrValueIs(kNameSpaceID_None, nsGkAtoms::disabled,
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NS_LITERAL_STRING("true"), eCaseMatters);
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}
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bool
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nsNativeTheme::IsFrameRTL(nsIFrame* aFrame)
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{
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if (!aFrame) {
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return false;
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}
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WritingMode wm = aFrame->GetWritingMode();
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return !(wm.IsVertical() ? wm.IsVerticalLR() : wm.IsBidiLTR());
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}
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bool
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nsNativeTheme::IsHTMLContent(nsIFrame *aFrame)
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{
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if (!aFrame) {
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return false;
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}
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nsIContent* content = aFrame->GetContent();
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return content && content->IsHTMLElement();
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}
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// scrollbar button:
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int32_t
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nsNativeTheme::GetScrollbarButtonType(nsIFrame* aFrame)
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{
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if (!aFrame)
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return 0;
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static nsIContent::AttrValuesArray strings[] =
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{&nsGkAtoms::scrollbarDownBottom, &nsGkAtoms::scrollbarDownTop,
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&nsGkAtoms::scrollbarUpBottom, &nsGkAtoms::scrollbarUpTop,
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nullptr};
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switch (aFrame->GetContent()->FindAttrValueIn(kNameSpaceID_None,
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nsGkAtoms::sbattr,
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strings, eCaseMatters)) {
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case 0: return eScrollbarButton_Down | eScrollbarButton_Bottom;
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case 1: return eScrollbarButton_Down;
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case 2: return eScrollbarButton_Bottom;
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case 3: return eScrollbarButton_UpTop;
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}
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return 0;
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}
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// treeheadercell:
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nsNativeTheme::TreeSortDirection
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nsNativeTheme::GetTreeSortDirection(nsIFrame* aFrame)
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{
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if (!aFrame || !aFrame->GetContent())
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return eTreeSortDirection_Natural;
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static nsIContent::AttrValuesArray strings[] =
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{&nsGkAtoms::descending, &nsGkAtoms::ascending, nullptr};
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switch (aFrame->GetContent()->FindAttrValueIn(kNameSpaceID_None,
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nsGkAtoms::sortDirection,
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strings, eCaseMatters)) {
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case 0: return eTreeSortDirection_Descending;
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case 1: return eTreeSortDirection_Ascending;
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}
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return eTreeSortDirection_Natural;
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}
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bool
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nsNativeTheme::IsLastTreeHeaderCell(nsIFrame* aFrame)
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{
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if (!aFrame)
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return false;
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// A tree column picker is always the last header cell.
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if (aFrame->GetContent()->IsXULElement(nsGkAtoms::treecolpicker))
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return true;
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// Find the parent tree.
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nsIContent* parent = aFrame->GetContent()->GetParent();
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while (parent && !parent->IsXULElement(nsGkAtoms::tree)) {
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parent = parent->GetParent();
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}
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// If the column picker is visible, this can't be the last column.
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if (parent && !parent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::hidecolumnpicker,
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NS_LITERAL_STRING("true"), eCaseMatters))
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return false;
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while ((aFrame = aFrame->GetNextSibling())) {
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if (aFrame->GetRect().width > 0)
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return false;
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}
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return true;
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}
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// tab:
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bool
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nsNativeTheme::IsBottomTab(nsIFrame* aFrame)
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{
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if (!aFrame)
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return false;
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nsAutoString classStr;
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aFrame->GetContent()->GetAttr(kNameSpaceID_None, nsGkAtoms::_class, classStr);
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return !classStr.IsEmpty() && classStr.Find("tab-bottom") != kNotFound;
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}
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bool
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nsNativeTheme::IsFirstTab(nsIFrame* aFrame)
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{
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if (!aFrame)
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return false;
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nsIFrame* first = aFrame->GetParent()->GetFirstPrincipalChild();
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while (first) {
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if (first->GetRect().width > 0 &&
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first->GetContent()->IsXULElement(nsGkAtoms::tab))
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return (first == aFrame);
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first = first->GetNextSibling();
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}
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return false;
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}
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bool
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nsNativeTheme::IsHorizontal(nsIFrame* aFrame)
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{
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if (!aFrame)
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return false;
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return !aFrame->GetContent()->AttrValueIs(kNameSpaceID_None, nsGkAtoms::orient,
|
|
nsGkAtoms::vertical,
|
|
eCaseMatters);
|
|
}
|
|
|
|
bool
|
|
nsNativeTheme::IsNextToSelectedTab(nsIFrame* aFrame, int32_t aOffset)
|
|
{
|
|
if (!aFrame)
|
|
return false;
|
|
|
|
if (aOffset == 0)
|
|
return IsSelectedTab(aFrame);
|
|
|
|
int32_t thisTabIndex = -1, selectedTabIndex = -1;
|
|
|
|
nsIFrame* currentTab = aFrame->GetParent()->GetFirstPrincipalChild();
|
|
for (int32_t i = 0; currentTab; currentTab = currentTab->GetNextSibling()) {
|
|
if (currentTab->GetRect().width == 0)
|
|
continue;
|
|
if (aFrame == currentTab)
|
|
thisTabIndex = i;
|
|
if (IsSelectedTab(currentTab))
|
|
selectedTabIndex = i;
|
|
++i;
|
|
}
|
|
|
|
if (thisTabIndex == -1 || selectedTabIndex == -1)
|
|
return false;
|
|
|
|
return (thisTabIndex - selectedTabIndex == aOffset);
|
|
}
|
|
|
|
// progressbar:
|
|
bool
|
|
nsNativeTheme::IsIndeterminateProgress(nsIFrame* aFrame,
|
|
EventStates aEventStates)
|
|
{
|
|
if (!aFrame || !aFrame->GetContent())
|
|
return false;
|
|
|
|
if (aFrame->GetContent()->IsHTMLElement(nsGkAtoms::progress)) {
|
|
return aEventStates.HasState(NS_EVENT_STATE_INDETERMINATE);
|
|
}
|
|
|
|
return aFrame->GetContent()->AttrValueIs(kNameSpaceID_None, nsGkAtoms::mode,
|
|
NS_LITERAL_STRING("undetermined"),
|
|
eCaseMatters);
|
|
}
|
|
|
|
bool
|
|
nsNativeTheme::IsVerticalProgress(nsIFrame* aFrame)
|
|
{
|
|
if (!aFrame) {
|
|
return false;
|
|
}
|
|
return IsVerticalMeter(aFrame);
|
|
}
|
|
|
|
bool
|
|
nsNativeTheme::IsVerticalMeter(nsIFrame* aFrame)
|
|
{
|
|
NS_PRECONDITION(aFrame, "You have to pass a non-null aFrame");
|
|
switch (aFrame->StyleDisplay()->mOrient) {
|
|
case NS_STYLE_ORIENT_HORIZONTAL:
|
|
return false;
|
|
case NS_STYLE_ORIENT_VERTICAL:
|
|
return true;
|
|
case NS_STYLE_ORIENT_INLINE:
|
|
return aFrame->GetWritingMode().IsVertical();
|
|
case NS_STYLE_ORIENT_BLOCK:
|
|
return !aFrame->GetWritingMode().IsVertical();
|
|
}
|
|
NS_NOTREACHED("unexpected -moz-orient value");
|
|
return false;
|
|
}
|
|
|
|
// menupopup:
|
|
bool
|
|
nsNativeTheme::IsSubmenu(nsIFrame* aFrame, bool* aLeftOfParent)
|
|
{
|
|
if (!aFrame)
|
|
return false;
|
|
|
|
nsIContent* parentContent = aFrame->GetContent()->GetParent();
|
|
if (!parentContent || !parentContent->IsXULElement(nsGkAtoms::menu))
|
|
return false;
|
|
|
|
nsIFrame* parent = aFrame;
|
|
while ((parent = parent->GetParent())) {
|
|
if (parent->GetContent() == parentContent) {
|
|
if (aLeftOfParent) {
|
|
LayoutDeviceIntRect selfBounds, parentBounds;
|
|
aFrame->GetNearestWidget()->GetScreenBounds(selfBounds);
|
|
parent->GetNearestWidget()->GetScreenBounds(parentBounds);
|
|
*aLeftOfParent = selfBounds.x < parentBounds.x;
|
|
}
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
nsNativeTheme::IsRegularMenuItem(nsIFrame *aFrame)
|
|
{
|
|
nsMenuFrame *menuFrame = do_QueryFrame(aFrame);
|
|
return !(menuFrame && (menuFrame->IsOnMenuBar() ||
|
|
menuFrame->GetParentMenuListType() != eNotMenuList));
|
|
}
|
|
|
|
bool
|
|
nsNativeTheme::IsMenuListEditable(nsIFrame *aFrame)
|
|
{
|
|
bool isEditable = false;
|
|
nsCOMPtr<nsIDOMXULMenuListElement> menulist = do_QueryInterface(aFrame->GetContent());
|
|
if (menulist)
|
|
menulist->GetEditable(&isEditable);
|
|
return isEditable;
|
|
}
|
|
|
|
bool
|
|
nsNativeTheme::QueueAnimatedContentForRefresh(nsIContent* aContent,
|
|
uint32_t aMinimumFrameRate)
|
|
{
|
|
NS_ASSERTION(aContent, "Null pointer!");
|
|
NS_ASSERTION(aMinimumFrameRate, "aMinimumFrameRate must be non-zero!");
|
|
NS_ASSERTION(aMinimumFrameRate <= 1000,
|
|
"aMinimumFrameRate must be less than 1000!");
|
|
|
|
uint32_t timeout = 1000 / aMinimumFrameRate;
|
|
timeout = std::min(mAnimatedContentTimeout, timeout);
|
|
|
|
if (!mAnimatedContentTimer) {
|
|
mAnimatedContentTimer = do_CreateInstance(NS_TIMER_CONTRACTID);
|
|
NS_ENSURE_TRUE(mAnimatedContentTimer, false);
|
|
}
|
|
|
|
if (mAnimatedContentList.IsEmpty() || timeout != mAnimatedContentTimeout) {
|
|
nsresult rv;
|
|
if (!mAnimatedContentList.IsEmpty()) {
|
|
rv = mAnimatedContentTimer->Cancel();
|
|
NS_ENSURE_SUCCESS(rv, false);
|
|
}
|
|
|
|
rv = mAnimatedContentTimer->InitWithCallback(this, timeout,
|
|
nsITimer::TYPE_ONE_SHOT);
|
|
NS_ENSURE_SUCCESS(rv, false);
|
|
|
|
mAnimatedContentTimeout = timeout;
|
|
}
|
|
|
|
if (!mAnimatedContentList.AppendElement(aContent)) {
|
|
NS_WARNING("Out of memory!");
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsNativeTheme::Notify(nsITimer* aTimer)
|
|
{
|
|
NS_ASSERTION(aTimer == mAnimatedContentTimer, "Wrong timer!");
|
|
|
|
// XXX Assumes that calling nsIFrame::Invalidate won't reenter
|
|
// QueueAnimatedContentForRefresh.
|
|
|
|
uint32_t count = mAnimatedContentList.Length();
|
|
for (uint32_t index = 0; index < count; index++) {
|
|
nsIFrame* frame = mAnimatedContentList[index]->GetPrimaryFrame();
|
|
if (frame) {
|
|
frame->InvalidateFrame();
|
|
}
|
|
}
|
|
|
|
mAnimatedContentList.Clear();
|
|
mAnimatedContentTimeout = UINT32_MAX;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsNativeTheme::GetAdjacentSiblingFrameWithSameAppearance(nsIFrame* aFrame,
|
|
bool aNextSibling)
|
|
{
|
|
if (!aFrame)
|
|
return nullptr;
|
|
|
|
// Find the next visible sibling.
|
|
nsIFrame* sibling = aFrame;
|
|
do {
|
|
sibling = aNextSibling ? sibling->GetNextSibling() : sibling->GetPrevSibling();
|
|
} while (sibling && sibling->GetRect().width == 0);
|
|
|
|
// Check same appearance and adjacency.
|
|
if (!sibling ||
|
|
sibling->StyleDisplay()->mAppearance != aFrame->StyleDisplay()->mAppearance ||
|
|
(sibling->GetRect().XMost() != aFrame->GetRect().x &&
|
|
aFrame->GetRect().XMost() != sibling->GetRect().x))
|
|
return nullptr;
|
|
return sibling;
|
|
}
|
|
|
|
bool
|
|
nsNativeTheme::IsRangeHorizontal(nsIFrame* aFrame)
|
|
{
|
|
nsIFrame* rangeFrame = aFrame;
|
|
if (rangeFrame->GetType() != nsGkAtoms::rangeFrame) {
|
|
// If the thumb's frame is passed in, get its range parent:
|
|
rangeFrame = aFrame->GetParent();
|
|
}
|
|
if (rangeFrame->GetType() == nsGkAtoms::rangeFrame) {
|
|
return static_cast<nsRangeFrame*>(rangeFrame)->IsHorizontal();
|
|
}
|
|
// Not actually a range frame - just use the ratio of the frame's size to
|
|
// decide:
|
|
return aFrame->GetSize().width >= aFrame->GetSize().height;
|
|
}
|
|
|
|
static nsIFrame*
|
|
GetBodyFrame(nsIFrame* aCanvasFrame)
|
|
{
|
|
nsIContent* content = aCanvasFrame->GetContent();
|
|
if (!content) {
|
|
return nullptr;
|
|
}
|
|
nsIDocument* document = content->OwnerDoc();
|
|
nsIContent* body = document->GetBodyElement();
|
|
if (!body) {
|
|
return nullptr;
|
|
}
|
|
return body->GetPrimaryFrame();
|
|
}
|
|
|
|
bool
|
|
nsNativeTheme::IsDarkBackground(nsIFrame* aFrame)
|
|
{
|
|
nsIScrollableFrame* scrollFrame = nullptr;
|
|
while (!scrollFrame && aFrame) {
|
|
scrollFrame = aFrame->GetScrollTargetFrame();
|
|
aFrame = aFrame->GetParent();
|
|
}
|
|
if (!scrollFrame)
|
|
return false;
|
|
|
|
nsIFrame* frame = scrollFrame->GetScrolledFrame();
|
|
if (nsCSSRendering::IsCanvasFrame(frame)) {
|
|
// For canvas frames, prefer to look at the body first, because the body
|
|
// background color is most likely what will be visible as the background
|
|
// color of the page, even if the html element has a different background
|
|
// color which prevents that of the body frame to propagate to the viewport.
|
|
nsIFrame* bodyFrame = GetBodyFrame(frame);
|
|
if (bodyFrame) {
|
|
frame = bodyFrame;
|
|
}
|
|
}
|
|
nsStyleContext* bgSC = nullptr;
|
|
if (!nsCSSRendering::FindBackground(frame, &bgSC) ||
|
|
bgSC->StyleBackground()->IsTransparent()) {
|
|
nsIFrame* backgroundFrame = nsCSSRendering::FindNonTransparentBackgroundFrame(frame, true);
|
|
nsCSSRendering::FindBackground(backgroundFrame, &bgSC);
|
|
}
|
|
if (bgSC) {
|
|
nscolor bgColor = bgSC->StyleBackground()->mBackgroundColor;
|
|
// Consider the background color dark if the sum of the r, g and b values is
|
|
// less than 384 in a semi-transparent document. This heuristic matches what
|
|
// WebKit does, and we can improve it later if needed.
|
|
return NS_GET_A(bgColor) > 127 &&
|
|
NS_GET_R(bgColor) + NS_GET_G(bgColor) + NS_GET_B(bgColor) < 384;
|
|
}
|
|
return false;
|
|
}
|