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90 lines
2.3 KiB
C++
90 lines
2.3 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 "ScrollbarActivity.h"
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#include "nsContentUtils.h"
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#include "nsIFrame.h"
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#include "nsIScrollableFrame.h"
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#include "nsComponentManagerUtils.h"
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namespace mozilla {
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ScrollbarActivity::~ScrollbarActivity()
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{
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CancelActivityFinishedTimer();
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}
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void
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ScrollbarActivity::ActivityOccurred()
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{
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CancelActivityFinishedTimer();
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StartActivityFinishedTimer();
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SetIsActive(true);
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NS_ASSERTION(mIsActive, "need to be active during activity");
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}
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void
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ScrollbarActivity::ActivityFinished()
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{
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SetIsActive(false);
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NS_ASSERTION(!mIsActive, "need to be unactive once activity is finished");
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}
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static void
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SetBooleanAttribute(nsIContent* aContent, nsIAtom* aAttribute, bool aValue)
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{
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if (aContent) {
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if (aValue) {
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aContent->SetAttr(kNameSpaceID_None, aAttribute,
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NS_LITERAL_STRING("true"), true);
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} else {
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aContent->UnsetAttr(kNameSpaceID_None, aAttribute, true);
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}
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}
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}
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void
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ScrollbarActivity::SetIsActive(bool aNewActive)
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{
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if (mIsActive == aNewActive)
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return;
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mIsActive = aNewActive;
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SetBooleanAttribute(GetHorizontalScrollbar(), nsGkAtoms::active, mIsActive);
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SetBooleanAttribute(GetVerticalScrollbar(), nsGkAtoms::active, mIsActive);
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}
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void
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ScrollbarActivity::StartActivityFinishedTimer()
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{
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NS_ASSERTION(!mActivityFinishedTimer, "timer already alive!");
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mActivityFinishedTimer = do_CreateInstance("@mozilla.org/timer;1");
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mActivityFinishedTimer->InitWithFuncCallback(ActivityFinishedTimerFired, this,
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kScrollbarActivityFinishedDelay,
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nsITimer::TYPE_ONE_SHOT);
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}
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void
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ScrollbarActivity::CancelActivityFinishedTimer()
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{
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if (mActivityFinishedTimer) {
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mActivityFinishedTimer->Cancel();
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mActivityFinishedTimer = nullptr;
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}
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}
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nsIContent*
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ScrollbarActivity::GetScrollbarContent(bool aVertical)
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{
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nsIFrame* box = mScrollableFrame->GetScrollbarBox(aVertical);
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return box ? box->GetContent() : nullptr;
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return nullptr;
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}
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} // namespace mozilla
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