sd/source/console/PresenterSlidePreview.cxx

   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 #include "PresenterSlidePreview.hxx"
  21 #include "PresenterCanvasHelper.hxx"
  22 #include "PresenterGeometryHelper.hxx"
  23 #include "PresenterPaintManager.hxx"
  24 #include "PresenterBitmapContainer.hxx"
  25 #include <com/sun/star/awt/XWindowPeer.hpp>
  26 #include <com/sun/star/rendering/CompositeOperation.hpp>
  27
  28 using namespace ::com::sun::star;
  29 using namespace ::com::sun::star::uno;
  30 using namespace ::com::sun::star::drawing::framework;
  31
  32 namespace
  33 {
  34     // Use a super sample factor greater than 1 to achieve a poor mans
  35     // antialiasing effect for slide previews.
  36     const sal_Int16 gnSuperSampleFactor = 2;
  37 }
  38
  39 namespace sdext::presenter {
  40
  41 //===== PresenterSlidePreview =================================================
  42
  43 PresenterSlidePreview::PresenterSlidePreview (
  44     const Reference<XComponentContext>& rxContext,
  45     const Reference<XResourceId>& rxViewId,
  46     const Reference<XPane>& rxAnchorPane,
  47     const ::rtl::Reference<PresenterController>& rpPresenterController)
  48     : PresenterSlidePreviewInterfaceBase(m_aMutex),
  49       mpPresenterController(rpPresenterController),
  50       mxViewId(rxViewId),
  51       mnSlideAspectRatio(28.0 / 21.0)
  52 {
  53     if ( ! rxContext.is()
  54         || ! rxViewId.is()
  55         || ! rxAnchorPane.is()
  56         || ! rpPresenterController.is())
  57     {
  58         throw RuntimeException(
  59             u"PresenterSlidePreview can not be constructed due to empty argument"_ustr,
  60             static_cast<XWeak*>(this));
  61     }
  62
  63     mxWindow = rxAnchorPane->getWindow();
  64     mxCanvas = rxAnchorPane->getCanvas();
  65
  66     if (mxWindow.is())
  67     {
  68         mxWindow->addWindowListener(this);
  69         mxWindow->addPaintListener(this);
  70
  71         Reference<awt::XWindowPeer> xPeer (mxWindow, UNO_QUERY);
  72         if (xPeer.is())
  73             xPeer->setBackground(util::Color(0xff000000));
  74
  75         mxWindow->setVisible(true);
  76     }
  77
  78     if (mpPresenterController)
  79         mnSlideAspectRatio = mpPresenterController->GetSlideAspectRatio();
  80
  81     Reference<lang::XMultiComponentFactory> xFactory = rxContext->getServiceManager();
  82     if (xFactory.is())
  83         mxPreviewRenderer.set(
  84             xFactory->createInstanceWithContext(
  85                 u"com.sun.star.drawing.SlideRenderer"_ustr,
  86                 rxContext),
  87             UNO_QUERY);
  88     mpBitmaps = std::make_shared<PresenterBitmapContainer>(
  89             "PresenterScreenSettings/ScrollBar/Bitmaps",
  90             std::shared_ptr<PresenterBitmapContainer>(),
  91             rxContext,
  92             mxCanvas);
  93     Resize();
  94 }
  95
  96 PresenterSlidePreview::~PresenterSlidePreview()
  97 {
  98 }
  99
 100 void SAL_CALL PresenterSlidePreview::disposing()
 101 {
 102     if (mxWindow.is())
 103     {
 104         mxWindow->removeWindowListener(this);
 105         mxWindow->removePaintListener(this);
 106         mxWindow = nullptr;
 107         mxCanvas = nullptr;
 108     }
 109
 110     Reference<lang::XComponent> xComponent (mxPreviewRenderer, UNO_QUERY);
 111     if (xComponent.is())
 112         xComponent->dispose();
 113 }
 114
 115 //----- XResourceId -----------------------------------------------------------
 116
 117 Reference<XResourceId> SAL_CALL PresenterSlidePreview::getResourceId()
 118 {
 119     return mxViewId;
 120 }
 121
 122 sal_Bool SAL_CALL PresenterSlidePreview::isAnchorOnly()
 123 {
 124     return false;
 125 }
 126
 127 //----- XWindowListener -------------------------------------------------------
 128
 129 void SAL_CALL PresenterSlidePreview::windowResized (const awt::WindowEvent&)
 130 {
 131     ThrowIfDisposed();
 132     ::osl::MutexGuard aGuard (::osl::Mutex::getGlobalMutex());
 133     Resize();
 134 }
 135
 136 void SAL_CALL PresenterSlidePreview::windowMoved (const awt::WindowEvent&) {}
 137
 138 void SAL_CALL PresenterSlidePreview::windowShown (const lang::EventObject&)
 139 {
 140     ThrowIfDisposed();
 141     ::osl::MutexGuard aGuard (::osl::Mutex::getGlobalMutex());
 142     Resize();
 143 }
 144
 145 void SAL_CALL PresenterSlidePreview::windowHidden (const lang::EventObject&) {}
 146
 147 //----- XPaintListener --------------------------------------------------------
 148
 149 void SAL_CALL PresenterSlidePreview::windowPaint (const awt::PaintEvent& rEvent)
 150 {
 151     ThrowIfDisposed();
 152
 153     ::osl::MutexGuard aGuard (::osl::Mutex::getGlobalMutex());
 154     if (mxWindow.is())
 155         Paint(awt::Rectangle(
 156             rEvent.UpdateRect.X,
 157             rEvent.UpdateRect.Y,
 158             rEvent.UpdateRect.Width,
 159             rEvent.UpdateRect.Height));
 160 }
 161
 162 //----- lang::XEventListener --------------------------------------------------
 163
 164 void SAL_CALL PresenterSlidePreview::disposing (const lang::EventObject& rEvent)
 165 {
 166     if (rEvent.Source == mxWindow)
 167     {
 168         mxWindow = nullptr;
 169         mxCanvas = nullptr;
 170         mxPreview = nullptr;
 171     }
 172 }
 173
 174 //----- XDrawView -------------------------------------------------------------
 175
 176 void SAL_CALL PresenterSlidePreview::setCurrentPage (const Reference<drawing::XDrawPage>& rxSlide)
 177 {
 178     ThrowIfDisposed();
 179     ::osl::MutexGuard aGuard (::osl::Mutex::getGlobalMutex());
 180     SetSlide(rxSlide);
 181 }
 182
 183 Reference<drawing::XDrawPage> SAL_CALL PresenterSlidePreview::getCurrentPage()
 184 {
 185     ThrowIfDisposed();
 186     return nullptr;
 187 }
 188
 189
 190 void PresenterSlidePreview::SetSlide (const Reference<drawing::XDrawPage>& rxPage)
 191 {
 192     mxCurrentSlide = rxPage;
 193     mxPreview = nullptr;
 194
 195     // The preview is not transparent, therefore only this window, not its
 196     // parent, has to be invalidated.
 197     mpPresenterController->GetPaintManager()->Invalidate(mxWindow);
 198 }
 199
 200 void PresenterSlidePreview::Paint (const awt::Rectangle& rBoundingBox)
 201 {
 202     if ( ! mxWindow.is())
 203         return;
 204     if ( ! mxCanvas.is())
 205         return;
 206     if ( ! mxPreviewRenderer.is())
 207         return;
 208
 209     // Make sure that a preview in the correct size exists.
 210     awt::Rectangle aWindowBox (mxWindow->getPosSize());
 211
 212     bool bCustomAnimation = false;
 213     bool bTransition = false;
 214     if( mxCurrentSlide.is() )
 215     {
 216         bCustomAnimation = PresenterController::HasCustomAnimation(mxCurrentSlide);
 217         bTransition = PresenterController::HasTransition(mxCurrentSlide);
 218     }
 219
 220     if ( ! mxPreview.is() && mxCurrentSlide.is())
 221     {
 222         // Create a new preview bitmap.
 223         mxPreview = mxPreviewRenderer->createPreviewForCanvas(
 224             mxCurrentSlide,
 225             awt::Size(aWindowBox.Width, aWindowBox.Height),
 226             gnSuperSampleFactor,
 227             mxCanvas);
 228     }
 229
 230     // Determine the bounding box of the preview.
 231     awt::Rectangle aPreviewBox;
 232     if (mxPreview.is())
 233     {
 234         const geometry::IntegerSize2D aPreviewSize (mxPreview->getSize());
 235         aPreviewBox = awt::Rectangle(
 236             (aWindowBox.Width - aPreviewSize.Width)/2,
 237             (aWindowBox.Height - aPreviewSize.Height)/2,
 238             aPreviewSize.Width,
 239             aPreviewSize.Height);
 240     }
 241     else
 242     {
 243         if (mnSlideAspectRatio > 0)
 244         {
 245             const awt::Size aPreviewSize (mxPreviewRenderer->calculatePreviewSize(
 246                 mnSlideAspectRatio,awt::Size(aWindowBox.Width, aWindowBox.Height)));
 247             aPreviewBox = awt::Rectangle(
 248                 (aWindowBox.Width - aPreviewSize.Width)/2,
 249                 (aWindowBox.Height - aPreviewSize.Height)/2,
 250                 aPreviewSize.Width,
 251                 aPreviewSize.Height);
 252         }
 253     }
 254
 255     // Paint the background.
 256     mpPresenterController->GetCanvasHelper()->Paint(
 257         mpPresenterController->GetViewBackground(mxViewId->getResourceURL()),
 258         mxCanvas,
 259         rBoundingBox,
 260         awt::Rectangle(0,0,aWindowBox.Width,aWindowBox.Height),
 261         aPreviewBox);
 262
 263     // Paint the preview.
 264     const rendering::ViewState aViewState(
 265         geometry::AffineMatrix2D(1,0,0, 0,1,0),
 266         nullptr);
 267
 268     Sequence<double> aBackgroundColor(4);
 269     rendering::RenderState aRenderState (
 270         geometry::AffineMatrix2D(1, 0, aPreviewBox.X, 0, 1, aPreviewBox.Y),
 271         nullptr,
 272         aBackgroundColor,
 273         rendering::CompositeOperation::SOURCE);
 274     PresenterCanvasHelper::SetDeviceColor(aRenderState, 0x00000000);
 275     if (mxPreview.is())
 276     {
 277         mxCanvas->drawBitmap(mxPreview, aViewState, aRenderState);
 278         if( bTransition )
 279         {
 280             const awt::Rectangle aTransitionPreviewBox(5, aWindowBox.Height-20, 0, 0);
 281             SharedBitmapDescriptor aTransitionDescriptor = mpBitmaps->GetBitmap(u"Transition"_ustr);
 282             Reference<rendering::XBitmap> xTransitionIcon (aTransitionDescriptor->GetNormalBitmap());
 283             rendering::RenderState aTransitionRenderState (
 284                 geometry::AffineMatrix2D(1, 0, aTransitionPreviewBox.X, 0, 1, aTransitionPreviewBox.Y),
 285                 nullptr,
 286                 aBackgroundColor,
 287                 rendering::CompositeOperation::SOURCE);
 288             mxCanvas->drawBitmap(xTransitionIcon, aViewState, aTransitionRenderState);
 289         }
 290         if( bCustomAnimation )
 291         {
 292             const awt::Rectangle aAnimationPreviewBox(5, aWindowBox.Height-40, 0, 0);
 293             SharedBitmapDescriptor aAnimationDescriptor = mpBitmaps->GetBitmap(u"Animation"_ustr);
 294             Reference<rendering::XBitmap> xAnimationIcon (aAnimationDescriptor->GetNormalBitmap());
 295             rendering::RenderState aAnimationRenderState (
 296                 geometry::AffineMatrix2D(1, 0, aAnimationPreviewBox.X, 0, 1, aAnimationPreviewBox.Y),
 297                 nullptr,
 298                 aBackgroundColor,
 299                 rendering::CompositeOperation::SOURCE);
 300             mxCanvas->drawBitmap(xAnimationIcon, aViewState, aAnimationRenderState);
 301         }
 302     }
 303     else
 304     {
 305         if (mnSlideAspectRatio > 0)
 306         {
 307             Reference<rendering::XPolyPolygon2D> xPolygon (
 308                 PresenterGeometryHelper::CreatePolygon(aPreviewBox, mxCanvas->getDevice()));
 309             if (xPolygon.is())
 310                 mxCanvas->fillPolyPolygon(xPolygon, aViewState, aRenderState);
 311         }
 312     }
 313
 314     Reference<rendering::XSpriteCanvas> xSpriteCanvas (mxCanvas, UNO_QUERY);
 315     if (xSpriteCanvas.is())
 316         xSpriteCanvas->updateScreen(false);
 317 }
 318
 319 void PresenterSlidePreview::Resize()
 320 {
 321     if (mxPreviewRenderer.is() && mxPreview.is())
 322     {
 323         const awt::Rectangle aWindowBox (mxWindow->getPosSize());
 324         const awt::Size aNewPreviewSize (mxPreviewRenderer->calculatePreviewSize(
 325             mnSlideAspectRatio,
 326                 awt::Size(aWindowBox.Width, aWindowBox.Height)));
 327         const geometry::IntegerSize2D aPreviewSize (mxPreview->getSize());
 328         if (aNewPreviewSize.Width==aPreviewSize.Width
 329             && aNewPreviewSize.Height==aPreviewSize.Height)
 330         {
 331             // The size of the window may have changed but the preview would
 332             // be painted in the same size (but not necessarily at the same
 333             // position.)
 334             return;
 335         }
 336     }
 337     SetSlide(mxCurrentSlide);
 338 }
 339
 340 void PresenterSlidePreview::ThrowIfDisposed()
 341 {
 342     if (PresenterSlidePreviewInterfaceBase::rBHelper.bDisposed || PresenterSlidePreviewInterfaceBase::rBHelper.bInDispose)
 343     {
 344         throw lang::DisposedException (
 345             u"PresenterSlidePreview object has already been disposed"_ustr,
 346             static_cast<uno::XWeak*>(this));
 347     }
 348 }
 349
 350 } // end of namespace ::sdext::presenter
 351
 352 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */