Line data Source code
1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 :
21 : // must be first
22 : #include <canvas/debug.hxx>
23 :
24 : #include <basegfx/range/b2drange.hxx>
25 : #include <basegfx/range/b1drange.hxx>
26 : #include <basegfx/range/b2dpolyrange.hxx>
27 : #include <basegfx/matrix/b2dhommatrix.hxx>
28 : #include <basegfx/polygon/b2dpolypolygon.hxx>
29 : #include <basegfx/polygon/b2dpolypolygontools.hxx>
30 : #include <basegfx/polygon/b2dpolypolygoncutter.hxx>
31 :
32 : #include "layer.hxx"
33 :
34 : #include <boost/bind.hpp>
35 :
36 :
37 : using namespace ::com::sun::star;
38 :
39 : namespace slideshow
40 : {
41 : namespace internal
42 : {
43 0 : Layer::Layer( const basegfx::B2DRange& rMaxLayerBounds,
44 : Dummy ) :
45 : maViewEntries(),
46 : maBounds(),
47 : maNewBounds(),
48 : maMaxBounds( rMaxLayerBounds ),
49 : mbBoundsDirty(false),
50 : mbBackgroundLayer(true),
51 0 : mbClipSet(false)
52 : {
53 0 : }
54 :
55 0 : Layer::Layer( const basegfx::B2DRange& rMaxLayerBounds ) :
56 : maViewEntries(),
57 : maBounds(),
58 : maNewBounds(),
59 : maMaxBounds( rMaxLayerBounds ),
60 : mbBoundsDirty(false),
61 : mbBackgroundLayer(false),
62 0 : mbClipSet(false)
63 : {
64 0 : }
65 :
66 0 : ViewLayerSharedPtr Layer::addView( const ViewSharedPtr& rNewView )
67 : {
68 : OSL_ASSERT( rNewView );
69 :
70 0 : ViewEntryVector::iterator aIter;
71 0 : const ViewEntryVector::iterator aEnd( maViewEntries.end() );
72 0 : if( (aIter=std::find_if( maViewEntries.begin(),
73 : aEnd,
74 : boost::bind<bool>(
75 : std::equal_to< ViewSharedPtr >(),
76 : boost::bind( &ViewEntry::getView, _1 ),
77 0 : boost::cref( rNewView )))) != aEnd )
78 : {
79 : // already added - just return existing layer
80 0 : return aIter->mpViewLayer;
81 :
82 : }
83 :
84 : // not yet added - create new view layer
85 0 : ViewLayerSharedPtr pNewLayer;
86 0 : if( mbBackgroundLayer )
87 0 : pNewLayer = rNewView;
88 : else
89 0 : pNewLayer = rNewView->createViewLayer(maBounds);
90 :
91 : // add to local list
92 : maViewEntries.push_back(
93 : ViewEntry( rNewView,
94 0 : pNewLayer ));
95 :
96 0 : return maViewEntries.back().mpViewLayer;
97 : }
98 :
99 0 : ViewLayerSharedPtr Layer::removeView( const ViewSharedPtr& rView )
100 : {
101 : OSL_ASSERT( rView );
102 :
103 0 : ViewEntryVector::iterator aIter;
104 0 : const ViewEntryVector::iterator aEnd( maViewEntries.end() );
105 0 : if( (aIter=std::find_if( maViewEntries.begin(),
106 : aEnd,
107 : boost::bind<bool>(
108 : std::equal_to< ViewSharedPtr >(),
109 : boost::bind( &ViewEntry::getView, _1 ),
110 0 : boost::cref( rView )))) == aEnd )
111 : {
112 : // View was not added/is already removed
113 0 : return ViewLayerSharedPtr();
114 : }
115 :
116 : OSL_ENSURE( std::count_if( maViewEntries.begin(),
117 : aEnd,
118 : boost::bind<bool>(
119 : std::equal_to< ViewSharedPtr >(),
120 : boost::bind( &ViewEntry::getView, _1 ),
121 : boost::cref( rView ))) == 1,
122 : "Layer::removeView(): view added multiple times" );
123 :
124 0 : ViewLayerSharedPtr pRet( aIter->mpViewLayer );
125 0 : maViewEntries.erase(aIter);
126 :
127 0 : return pRet;
128 : }
129 :
130 0 : void Layer::setShapeViews( ShapeSharedPtr const& rShape ) const
131 : {
132 0 : rShape->clearAllViewLayers();
133 :
134 : std::for_each( maViewEntries.begin(),
135 : maViewEntries.end(),
136 : boost::bind(&Shape::addViewLayer,
137 : boost::cref(rShape),
138 : boost::bind(&ViewEntry::getViewLayer,
139 : _1),
140 0 : false ));
141 0 : }
142 :
143 0 : void Layer::setPriority( const ::basegfx::B1DRange& rPrioRange )
144 : {
145 0 : if( !mbBackgroundLayer )
146 : {
147 : std::for_each( maViewEntries.begin(),
148 : maViewEntries.end(),
149 : boost::bind( &ViewLayer::setPriority,
150 : boost::bind( &ViewEntry::getViewLayer,
151 : _1 ),
152 0 : boost::cref(rPrioRange)));
153 : }
154 0 : }
155 :
156 0 : void Layer::addUpdateRange( ::basegfx::B2DRange const& rUpdateRange )
157 : {
158 : // TODO(Q1): move this to B2DMultiRange
159 0 : if( !rUpdateRange.isEmpty() )
160 : maUpdateAreas.appendElement( rUpdateRange,
161 0 : basegfx::B2VectorOrientation::Positive );
162 0 : }
163 :
164 0 : void Layer::updateBounds( ShapeSharedPtr const& rShape )
165 : {
166 0 : if( !mbBackgroundLayer )
167 : {
168 0 : if( !mbBoundsDirty )
169 0 : maNewBounds.reset();
170 :
171 0 : maNewBounds.expand( rShape->getUpdateArea() );
172 : }
173 :
174 0 : mbBoundsDirty = true;
175 0 : }
176 :
177 0 : bool Layer::commitBounds()
178 : {
179 0 : mbBoundsDirty = false;
180 :
181 0 : if( mbBackgroundLayer )
182 0 : return false;
183 :
184 0 : if( maNewBounds == maBounds )
185 0 : return false;
186 :
187 0 : maBounds = maNewBounds;
188 0 : if( std::count_if( maViewEntries.begin(),
189 : maViewEntries.end(),
190 : boost::bind( &ViewLayer::resize,
191 : boost::bind( &ViewEntry::getViewLayer,
192 : _1 ),
193 0 : boost::cref(maBounds)) ) == 0 )
194 : {
195 0 : return false;
196 : }
197 :
198 : // layer content invalid, update areas have wrong
199 : // coordinates/not sensible anymore.
200 0 : clearUpdateRanges();
201 :
202 0 : return true;
203 : }
204 :
205 0 : void Layer::clearUpdateRanges()
206 : {
207 0 : maUpdateAreas.clear();
208 0 : }
209 :
210 0 : void Layer::clearContent()
211 : {
212 : // clear content on all view layers
213 : std::for_each( maViewEntries.begin(),
214 : maViewEntries.end(),
215 : boost::bind(
216 : &ViewLayer::clearAll,
217 : boost::bind(
218 : &ViewEntry::getViewLayer,
219 0 : _1)));
220 :
221 : // layer content cleared, update areas are not sensible
222 : // anymore.
223 0 : clearUpdateRanges();
224 0 : }
225 :
226 : class LayerEndUpdate : private boost::noncopyable
227 : {
228 : public:
229 0 : LayerEndUpdate( LayerSharedPtr const& rLayer ) :
230 0 : mpLayer( rLayer )
231 0 : {}
232 :
233 0 : ~LayerEndUpdate() { if(mpLayer) mpLayer->endUpdate(); }
234 :
235 : private:
236 : LayerSharedPtr mpLayer;
237 : };
238 :
239 0 : Layer::EndUpdater Layer::beginUpdate()
240 : {
241 0 : if( maUpdateAreas.count() )
242 : {
243 : // perform proper layer update. That means, setup proper
244 : // clipping, and render each shape that intersects with
245 : // the calculated update area
246 0 : ::basegfx::B2DPolyPolygon aClip( maUpdateAreas.solveCrossovers() );
247 0 : aClip = ::basegfx::tools::stripNeutralPolygons(aClip);
248 0 : aClip = ::basegfx::tools::stripDispensablePolygons(aClip, false);
249 :
250 : // actually, if there happen to be shapes with zero
251 : // update area in the maUpdateAreas vector, the
252 : // resulting clip polygon will be empty.
253 0 : if( aClip.count() )
254 : {
255 : // set clip to all view layers
256 : std::for_each( maViewEntries.begin(),
257 : maViewEntries.end(),
258 : boost::bind(
259 : &ViewLayer::setClip,
260 : boost::bind(
261 : &ViewEntry::getViewLayer,
262 : _1),
263 0 : boost::cref(aClip)));
264 :
265 : // clear update area on all view layers
266 : std::for_each( maViewEntries.begin(),
267 : maViewEntries.end(),
268 : boost::bind(
269 : &ViewLayer::clear,
270 : boost::bind(
271 : &ViewEntry::getViewLayer,
272 0 : _1)));
273 :
274 0 : mbClipSet = true;
275 0 : }
276 : }
277 :
278 0 : return EndUpdater(new LayerEndUpdate(shared_from_this()));
279 : }
280 :
281 0 : void Layer::endUpdate()
282 : {
283 0 : if( mbClipSet )
284 : {
285 0 : mbClipSet = false;
286 :
287 0 : basegfx::B2DPolyPolygon aEmptyClip;
288 : std::for_each( maViewEntries.begin(),
289 : maViewEntries.end(),
290 : boost::bind(
291 : &ViewLayer::setClip,
292 : boost::bind(
293 : &ViewEntry::getViewLayer,
294 : _1),
295 0 : boost::cref(aEmptyClip)));
296 : }
297 :
298 0 : clearUpdateRanges();
299 0 : }
300 :
301 0 : bool Layer::isInsideUpdateArea( ShapeSharedPtr const& rShape ) const
302 : {
303 0 : return maUpdateAreas.overlaps( rShape->getUpdateArea() );
304 : }
305 :
306 0 : LayerSharedPtr Layer::createBackgroundLayer( const basegfx::B2DRange& rMaxLayerBounds )
307 : {
308 : return LayerSharedPtr(new Layer( rMaxLayerBounds,
309 0 : BackgroundLayer ));
310 : }
311 :
312 0 : LayerSharedPtr Layer::createLayer( const basegfx::B2DRange& rMaxLayerBounds )
313 : {
314 0 : return LayerSharedPtr( new Layer( rMaxLayerBounds ) );
315 : }
316 :
317 : }
318 3 : }
319 :
320 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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