forked from mirrors/gecko-dev
5ee44d898b
MozReview-Commit-ID: RrVzLcv27T --HG-- extra : amend_source : d14dc262bf300a81feaf03954d5783ea1c7451cb extra : histedit_source : aa39b53c122a719a5181b5a41d5351bbdf04cbd8
71 lines
2.2 KiB
Text
71 lines
2.2 KiB
Text
/* -*- 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/. */
|
|
|
|
#include "ViewRegion.h"
|
|
#import <Cocoa/Cocoa.h>
|
|
|
|
using namespace mozilla;
|
|
|
|
ViewRegion::~ViewRegion()
|
|
{
|
|
for (size_t i = 0; i < mViews.Length(); i++) {
|
|
[mViews[i] removeFromSuperview];
|
|
}
|
|
}
|
|
|
|
bool
|
|
ViewRegion::UpdateRegion(const LayoutDeviceIntRegion& aRegion,
|
|
const nsChildView& aCoordinateConverter,
|
|
NSView* aContainerView,
|
|
NSView* (^aViewCreationCallback)())
|
|
{
|
|
if (mRegion == aRegion) {
|
|
return false;
|
|
}
|
|
|
|
// We need to construct the required region using as many EffectViews
|
|
// as necessary. We try to update the geometry of existing views if
|
|
// possible, or create new ones or remove old ones if the number of
|
|
// rects in the region has changed.
|
|
|
|
nsTArray<NSView*> viewsToRecycle;
|
|
mViews.SwapElements(viewsToRecycle);
|
|
// The mViews array is now empty.
|
|
|
|
size_t i = 0;
|
|
for (auto iter = aRegion.RectIter();
|
|
!iter.Done() || i < viewsToRecycle.Length();
|
|
i++) {
|
|
if (!iter.Done()) {
|
|
NSView* view = nil;
|
|
NSRect rect = aCoordinateConverter.DevPixelsToCocoaPoints(iter.Get());
|
|
if (i < viewsToRecycle.Length()) {
|
|
view = viewsToRecycle[i];
|
|
} else {
|
|
view = aViewCreationCallback();
|
|
[aContainerView addSubview:view];
|
|
|
|
// Now that the view is in the view hierarchy, it'll be kept alive by
|
|
// its superview, so we can drop our reference.
|
|
[view release];
|
|
}
|
|
if (!NSEqualRects(rect, [view frame])) {
|
|
[view setFrame:rect];
|
|
}
|
|
[view setNeedsDisplay:YES];
|
|
mViews.AppendElement(view);
|
|
iter.Next();
|
|
} else {
|
|
// Our new region is made of fewer rects than the old region, so we can
|
|
// remove this view. We only have a weak reference to it, so removing it
|
|
// from the view hierarchy will release it.
|
|
[viewsToRecycle[i] removeFromSuperview];
|
|
}
|
|
}
|
|
|
|
mRegion = aRegion;
|
|
return true;
|
|
}
|