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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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This commit is contained in:
Roy Tam 2018-01-19 03:59:58 +08:00
commit dcd9973243
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57
layout/base/DisplayItemScrollClip.cpp Normal file
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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* 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/. */
#include "DisplayItemScrollClip.h"
#include "DisplayItemClip.h"
namespace mozilla {
/* static */ bool
DisplayItemScrollClip::IsAncestor(const DisplayItemScrollClip* aAncestor,
const DisplayItemScrollClip* aDescendant)
{
if (!aAncestor) {
// null means root.
return true;
}
for (const DisplayItemScrollClip* sc = aDescendant; sc; sc = sc->mParent) {
if (sc == aAncestor) {
return true;
}
}
return false;
}
bool
DisplayItemScrollClip::HasRoundedCorners() const
{
for (const DisplayItemScrollClip* scrollClip = this;
scrollClip; scrollClip = scrollClip->mParent) {
if (scrollClip->mClip->GetRoundedRectCount() > 0) {
return true;
}
}
return false;
}
/* static */ nsCString
DisplayItemScrollClip::ToString(const DisplayItemScrollClip* aScrollClip)
{
nsAutoCString str;
for (const DisplayItemScrollClip* scrollClip = aScrollClip;
scrollClip; scrollClip = scrollClip->mParent) {
str.AppendPrintf("<%s>%s", scrollClip->mClip ? scrollClip->mClip->ToString().get() : "null",
scrollClip->mIsAsyncScrollable ? " [async-scrollable]" : "");
if (scrollClip->mParent) {
str.Append(", ");
}
}
return str;
}
} // namespace mozilla