libreofficekit/qa/lokdocview_quad/lokdocview_quad.c

   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
  10 #include <sal/types.h>
  11
  12 #define LOK_USE_UNSTABLE_API
  13 #include <LibreOfficeKit/LibreOfficeKit.h>
  14
  15 #include "lokdocview_quad.h"
  16
  17 static void lok_docview_quad_class_init( LOKDocViewQuadClass* pClass );
  18 static void lok_docview_quad_init( LOKDocViewQuad* pDocView );
  19
  20 // We specifically need to destroy the document when closing in order to ensure
  21 // that lock files etc. are cleaned up.
  22 void lcl_onDestroy( LOKDocViewQuad* pDocView, gpointer pData )
  23 {
  24     (void) pData;
  25     if ( pDocView->pDocument )
  26         pDocView->pDocument->pClass->destroy( pDocView->pDocument );
  27     pDocView->pDocument = NULL;
  28 }
  29
  30 SAL_DLLPUBLIC_EXPORT guint lok_docview_quad_get_type()
  31 {
  32     static guint lok_docview_quad_type = 0;
  33
  34     if (!lok_docview_quad_type)
  35     {
  36         GtkTypeInfo lok_docview_quad_info =
  37         {
  38             "LokDocViewQuad",
  39             sizeof( LOKDocViewQuad ),
  40             sizeof( LOKDocViewQuadClass ),
  41             (GtkClassInitFunc) lok_docview_quad_class_init,
  42             (GtkObjectInitFunc) lok_docview_quad_init,
  43             NULL,
  44             NULL,
  45             (GtkClassInitFunc) NULL
  46         };
  47
  48         lok_docview_quad_type = gtk_type_unique( gtk_scrolled_window_get_type(), &lok_docview_quad_info );
  49     }
  50     return lok_docview_quad_type;
  51 }
  52
  53 static void lok_docview_quad_class_init( LOKDocViewQuadClass* pClass )
  54 {
  55     pClass->lok_docview_quad = NULL;
  56 }
  57
  58 static void lok_docview_quad_init( LOKDocViewQuad* pDocView )
  59 {
  60     int x, y;
  61
  62     // Gtk ScrolledWindow is apparently not fully initialised yet, we specifically
  63     // have to set the [hv]adjustment to prevent GTK assertions from firing, see
  64     // https://bugzilla.gnome.org/show_bug.cgi?id=438114 for more info.
  65     gtk_scrolled_window_set_hadjustment( GTK_SCROLLED_WINDOW( pDocView ), NULL );
  66     gtk_scrolled_window_set_vadjustment( GTK_SCROLLED_WINDOW( pDocView ), NULL );
  67
  68     pDocView->pEventBox = gtk_event_box_new();
  69     gtk_scrolled_window_add_with_viewport( GTK_SCROLLED_WINDOW(pDocView),
  70                                            pDocView->pEventBox );
  71
  72     pDocView->pGrid = gtk_table_new( 2, 2, TRUE );
  73     gtk_container_add( GTK_CONTAINER( pDocView->pEventBox ), pDocView->pGrid );
  74
  75     for ( x = 0; x < 2; x++ )
  76     {
  77         for ( y = 0; y < 2; y++ )
  78         {
  79             pDocView->pCanvas[x][y] = gtk_image_new();
  80             gtk_table_attach_defaults( GTK_TABLE( pDocView->pGrid ), pDocView->pCanvas[x][y], x, x+1, y, y+1 );
  81             //gtk_container_add( GTK_CONTAINER( pDocView->pEventBox ), pDocView->pCanvas );
  82             gtk_widget_show( pDocView->pCanvas[x][y] );
  83
  84             pDocView->pPixBuf[x][y] = 0;
  85         }
  86     }
  87
  88     gtk_widget_show( pDocView->pGrid );
  89     gtk_widget_show( pDocView->pEventBox );
  90
  91     // TODO: figure out a clever view of getting paths set up.
  92     pDocView->pOffice = 0;
  93     pDocView->pDocument = 0;
  94
  95     pDocView->fZoom = 1;
  96
  97     gtk_signal_connect( GTK_OBJECT(pDocView), "destroy",
  98                         GTK_SIGNAL_FUNC(lcl_onDestroy), NULL );
  99 }
 100
 101 SAL_DLLPUBLIC_EXPORT GtkWidget* lok_docview_quad_new( LibreOfficeKit* pOffice )
 102 {
 103     LOKDocViewQuad* pDocView = gtk_type_new( lok_docview_quad_get_type() );
 104     pDocView->pOffice = pOffice;
 105     return GTK_WIDGET( pDocView );
 106 }
 107
 108 void renderDocument( LOKDocViewQuad* pDocView )
 109 {
 110     long nWidth, nHeight;
 111     int nRenderWidth, nRenderHeight;
 112     int nRowStride;
 113     int x, y;
 114     GdkPixbuf* pTempBuf;
 115
 116     g_assert( pDocView->pDocument );
 117
 118     for ( x = 0; x < 2; x++ )
 119     {
 120         for ( y = 0; y < 2; y++ )
 121         {
 122             if ( pDocView->pPixBuf[x][y] )
 123             {
 124                 g_object_unref( G_OBJECT( pDocView->pPixBuf[x][y] ) );
 125             }
 126         }
 127     }
 128
 129     pDocView->pDocument->pClass->getDocumentSize( pDocView->pDocument, &nWidth, &nHeight );
 130
 131     // Draw the whole document at once (for now)
 132
 133     // TODO: we really should scale by screen DPI here -- 10 seems to be a vaguely
 134     // correct factor for my screen at least.
 135     nRenderWidth = nWidth * pDocView->fZoom / 10;
 136     nRenderHeight = nHeight * pDocView->fZoom / 10;
 137
 138     // TOP-LEFT: standard
 139     // TOP-RIGHT: 2x resolution rendered (post-scaled to 50%)
 140     // BOTTOM-LEFT: 1/2 resolution rendered (post-scaled 200%)
 141     // BOTTOM-RIGHT: 1/2 resolution rendered (post-scaled 400%)
 142     pDocView->pPixBuf[0][0] = gdk_pixbuf_new( GDK_COLORSPACE_RGB,
 143                                               TRUE, 8,
 144                                               nRenderWidth / 2, nRenderHeight / 2 );
 145     pDocView->pDocument->pClass->paintTile( pDocView->pDocument,
 146                                             gdk_pixbuf_get_pixels( pDocView->pPixBuf[0][0] ),
 147                                             nRenderWidth / 2, nRenderHeight / 2,
 148                                             &nRowStride,
 149                                             0, 0, // origin
 150                                             nWidth / 2, nHeight / 2 );
 151
 152     pDocView->pPixBuf[1][0] = gdk_pixbuf_new( GDK_COLORSPACE_RGB,
 153                                               TRUE, 8,
 154                                               nRenderWidth, nRenderHeight );
 155     pDocView->pDocument->pClass->paintTile( pDocView->pDocument,
 156                                             gdk_pixbuf_get_pixels( pDocView->pPixBuf[1][0] ),
 157                                             nRenderWidth, nRenderHeight,
 158                                             &nRowStride,
 159                                             nWidth / 2, 0,
 160                                             nWidth / 2, nHeight / 2 );
 161     pTempBuf = gdk_pixbuf_scale_simple( GDK_PIXBUF( pDocView->pPixBuf[1][0] ),
 162                                         nRenderWidth / 2,
 163                                         nRenderHeight / 2,
 164                                         GDK_INTERP_BILINEAR );
 165     g_object_unref( G_OBJECT( pDocView->pPixBuf[1][0] ) );
 166     pDocView->pPixBuf[1][0] = pTempBuf;
 167
 168
 169     pDocView->pPixBuf[0][1] = gdk_pixbuf_new( GDK_COLORSPACE_RGB,
 170                                               TRUE, 8,
 171                                               nRenderWidth / 4, nRenderHeight / 4 );
 172     pDocView->pDocument->pClass->paintTile( pDocView->pDocument,
 173                                             gdk_pixbuf_get_pixels( pDocView->pPixBuf[0][1] ),
 174                                             nRenderWidth / 4, nRenderHeight / 4,
 175                                             &nRowStride,
 176                                             0, nHeight / 2,
 177                                             nWidth / 2, nHeight / 2 );
 178     pTempBuf = gdk_pixbuf_scale_simple( GDK_PIXBUF( pDocView->pPixBuf[0][1] ),
 179                                         nRenderWidth / 2,
 180                                         nRenderHeight / 2,
 181                                         GDK_INTERP_BILINEAR );
 182     g_object_unref( G_OBJECT( pDocView->pPixBuf[0][1] ) );
 183     pDocView->pPixBuf[0][1] = pTempBuf;
 184
 185     pDocView->pPixBuf[1][1] = gdk_pixbuf_new( GDK_COLORSPACE_RGB,
 186                                               TRUE, 8,
 187                                               nRenderWidth / 8, nRenderHeight / 8 );
 188     pDocView->pDocument->pClass->paintTile( pDocView->pDocument,
 189                                             gdk_pixbuf_get_pixels( pDocView->pPixBuf[1][1] ),
 190                                             nRenderWidth / 8, nRenderHeight / 8,
 191                                             &nRowStride,
 192                                             nWidth / 2, nHeight / 2,
 193                                             nWidth / 2, nHeight / 2 );
 194     pTempBuf = gdk_pixbuf_scale_simple( GDK_PIXBUF( pDocView->pPixBuf[1][1] ),
 195                                         nRenderWidth / 2,
 196                                         nRenderHeight / 2,
 197                                         GDK_INTERP_BILINEAR );
 198     g_object_unref( G_OBJECT( pDocView->pPixBuf[1][1] ) );
 199     pDocView->pPixBuf[1][1] = pTempBuf;
 200
 201
 202
 203     // TODO: double check that the rowstride really matches what we expected,
 204     // although presumably we'd already be crashing by now if things were
 205     // wrong.
 206     (void) nRowStride;
 207
 208     //    gtk_image_set_from_pixbuf( GTK_IMAGE( pDocView->pCanvas ), pDocView->pPixBuf );
 209     for ( x = 0; x < 2; x++ )
 210     {
 211         for ( y = 0; y < 2; y++ )
 212         {
 213             gtk_image_set_from_pixbuf( GTK_IMAGE( pDocView->pCanvas[x][y] ), pDocView->pPixBuf[x][y] );
 214         }
 215     }
 216 }
 217
 218 SAL_DLLPUBLIC_EXPORT gboolean lok_docview_quad_open_document( LOKDocViewQuad* pDocView, char* pPath )
 219 {
 220     if ( pDocView->pDocument )
 221     {
 222         pDocView->pDocument->pClass->destroy( pDocView->pDocument );
 223         pDocView->pDocument = NULL;
 224     }
 225
 226     pDocView->pDocument = pDocView->pOffice->pClass->documentLoad( pDocView->pOffice,
 227                                                                    pPath );
 228     if ( !pDocView->pDocument )
 229     {
 230         // FIXME: should have a GError parameter and populate it.
 231         char *pError = pDocView->pOffice->pClass->getError( pDocView->pOffice );
 232         fprintf( stderr, "Error opening document '%s'\n", pError );
 233         return FALSE;
 234     }
 235     else
 236         renderDocument( pDocView );
 237
 238     return TRUE;
 239 }
 240
 241 SAL_DLLPUBLIC_EXPORT void lok_docview_quad_set_zoom ( LOKDocViewQuad* pDocView, float fZoom )
 242 {
 243     pDocView->fZoom = fZoom;
 244     renderDocument( pDocView );
 245     // TODO: maybe remember and reset positiong?
 246 }
 247
 248 SAL_DLLPUBLIC_EXPORT float lok_docview_quad_get_zoom ( LOKDocViewQuad* pDocView )
 249 {
 250     return pDocView->fZoom;
 251 }
 252
 253 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */