src/ui/widget/imageicon.cpp

   1 /*
   2  * A simple image display widget, using Inkscape's own rendering engine
   3  *
   4  * Authors:
   5  *   Bob Jamison
   6  *   Other dudes from The Inkscape Organization
   7  *
   8  * Copyright (C) 2004 The Inkscape Organization
   9  *
  10  * Released under GNU GPL, read the file 'COPYING' for more information
  11  */
  12
  13
  14
  15
  16 #include "imageicon.h"
  17 #include <sys/stat.h>
  18 #include "svg-view-widget.h"
  19 #include "document.h"
  20 #include "inkscape.h"
  21
  22
  23 namespace Inkscape
  24 {
  25 namespace UI
  26 {
  27 namespace Widget
  28 {
  29
  30
  31
  32 typedef enum {
  33     SVG_TYPES,
  34     IMPORT_TYPES,
  35     EXPORT_TYPES
  36     } FileDialogType;
  37
  38
  39 /*#########################################################################
  40 ### ImageIcon widget
  41 #########################################################################*/
  42
  43
  44 /**
  45  * Constructor
  46  */
  47 ImageIcon::ImageIcon()
  48 {
  49     init();
  50 }
  51
  52 /**
  53  * Construct from a file name
  54  */
  55 ImageIcon::ImageIcon(const Glib::ustring &fileName)
  56 {
  57     init();
  58     showSvgFile(fileName);
  59 }
  60
  61 /**
  62  * Copy Constructor
  63  */
  64 ImageIcon::ImageIcon(const ImageIcon &other)
  65              : sigc::trackable(), Glib::ObjectBase(), Gtk::VBox()
  66 {
  67     init();
  68     document           = other.document;
  69     viewerGtkmm        = other.viewerGtkmm;
  70     showingBrokenImage = other.showingBrokenImage;
  71 }
  72
  73 /**
  74  * Destructor
  75  */
  76 ImageIcon::~ImageIcon()
  77 {
  78     if (document)
  79         sp_document_unref(document);
  80 }
  81
  82
  83 /**
  84  * basic initialization, called by the various constructors
  85  */
  86 void ImageIcon::init()
  87 {
  88     if (!INKSCAPE)
  89         inkscape_application_init("",false);
  90     document = NULL;
  91     viewerGtkmm = NULL;
  92     //set_size_request(150,150);
  93     showingBrokenImage = false;
  94 }
  95
  96
  97 bool ImageIcon::showSvgDocument(const SPDocument *docArg)
  98 {
  99
 100     if (document)
 101         sp_document_unref(document);
 102
 103     SPDocument *doc = (SPDocument *)docArg;
 104
 105     sp_document_ref(doc);
 106     document = doc;
 107
 108     //This should remove it from the box, and free resources
 109     //if (viewerGtkmm)
 110     //    viewerGtkmm->destroy();
 111
 112     GtkWidget *viewerGtk  = sp_svg_view_widget_new(doc);
 113     viewerGtkmm = Glib::wrap(viewerGtk);
 114
 115     viewerGtkmm->show();
 116     pack_start(*viewerGtkmm, TRUE, TRUE, 0);
 117
 118     //GtkWidget *vbox = (GtkWidget *)gobj();
 119     //gtk_box_pack_start(GTK_BOX(vbox), viewerGtk, TRUE, TRUE, 0);
 120
 121     return true;
 122 }
 123
 124 bool ImageIcon::showSvgFile(const Glib::ustring &theFileName)
 125 {
 126     Glib::ustring fileName = theFileName;
 127
 128     fileName = Glib::filename_to_utf8(fileName);
 129
 130     SPDocument *doc = sp_document_new (fileName.c_str(), 0);
 131     if (!doc) {
 132         g_warning("SVGView: error loading document '%s'\n", fileName.c_str());
 133         return false;
 134     }
 135
 136     showSvgDocument(doc);
 137
 138     sp_document_unref(doc);
 139
 140     return true;
 141 }
 142
 143
 144
 145 bool ImageIcon::showSvgFromMemory(const char *xmlBuffer)
 146 {
 147     if (!xmlBuffer)
 148         return false;
 149
 150     gint len = (gint)strlen(xmlBuffer);
 151     SPDocument *doc = sp_document_new_from_mem(xmlBuffer, len, 0);
 152     if (!doc) {
 153         g_warning("SVGView: error loading buffer '%s'\n",xmlBuffer);
 154         return false;
 155     }
 156
 157     showSvgDocument(doc);
 158
 159     sp_document_unref(doc);
 160
 161     return true;
 162 }
 163
 164
 165
 166 bool ImageIcon::showBitmap(const Glib::ustring &theFileName)
 167 {
 168     Glib::ustring fileName = theFileName;
 169
 170
 171     /*#####################################
 172     # LET'S HAVE SOME FUN WITH SVG!
 173     # Instead of just loading an image, why
 174     # don't we make a lovely little svg and
 175     # display it nicely?
 176     #####################################*/
 177
 178     //Arbitrary size of svg doc -- rather 'portrait' shaped
 179     gint previewWidth  = 400;
 180     gint previewHeight = 600;
 181
 182     //Get some image info. Smart pointer does not need to be deleted
 183     Glib::RefPtr<Gdk::Pixbuf> img = Gdk::Pixbuf::create_from_file(fileName);
 184     gint imgWidth  = img->get_width();
 185     gint imgHeight = img->get_height();
 186
 187     //Find the minimum scale to fit the image inside the preview area
 188     double scaleFactorX = (0.9 *(double)previewWidth)  / ((double)imgWidth);
 189     double scaleFactorY = (0.9 *(double)previewHeight) / ((double)imgHeight);
 190     double scaleFactor = scaleFactorX;
 191     if (scaleFactorX > scaleFactorY)
 192         scaleFactor = scaleFactorY;
 193
 194     //Now get the resized values
 195     gint scaledImgWidth  = (int) (scaleFactor * (double)imgWidth);
 196     gint scaledImgHeight = (int) (scaleFactor * (double)imgHeight);
 197
 198     //center the image on the area
 199     gint imgX = (previewWidth  - scaledImgWidth)  / 2;
 200     gint imgY = (previewHeight - scaledImgHeight) / 2;
 201
 202     //wrap a rectangle around the image
 203     gint rectX      = imgX-1;
 204     gint rectY      = imgY-1;
 205     gint rectWidth  = scaledImgWidth +2;
 206     gint rectHeight = scaledImgHeight+2;
 207
 208     //Our template.  Modify to taste
 209     gchar const *xformat =
 210           "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 211           "<svg\n"
 212           "xmlns=\"http://www.w3.org/2000/svg\"\n"
 213           "xmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
 214           "width=\"%d\" height=\"%d\">\n"
 215           "<rect\n"
 216           "  style=\"fill:#eeeeee;stroke:none\"\n"
 217           "  x=\"-100\" y=\"-100\" width=\"4000\" height=\"4000\"/>\n"
 218           "<image x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\"\n"
 219           "xlink:href=\"%s\"/>\n"
 220           "<rect\n"
 221           "  style=\"fill:none;"
 222           "    stroke:#000000;stroke-width:1.0;"
 223           "    stroke-linejoin:miter;stroke-opacity:1.0000000;"
 224           "    stroke-miterlimit:4.0000000;stroke-dasharray:none\"\n"
 225           "  x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\"/>\n"
 226           "</svg>\n\n";
 227
 228     //if (!Glib::get_charset()) //If we are not utf8
 229     fileName = Glib::filename_to_utf8(fileName);
 230
 231     //Fill in the template
 232     /* FIXME: Do proper XML quoting for fileName. */
 233     gchar *xmlBuffer = g_strdup_printf(xformat,
 234            previewWidth, previewHeight,
 235            imgX, imgY, scaledImgWidth, scaledImgHeight,
 236            fileName.c_str(),
 237            rectX, rectY, rectWidth, rectHeight);
 238
 239     //g_message("%s\n", xmlBuffer);
 240
 241     //now show it!
 242     showSvgFromMemory(xmlBuffer);
 243     g_free(xmlBuffer);
 244
 245     return true;
 246 }
 247
 248
 249
 250 void ImageIcon::showBrokenImage(const Glib::ustring &errorMessage)
 251 {
 252     //Are we already showing it?
 253     if (showingBrokenImage)
 254         return;
 255
 256     //Our template.  Modify to taste
 257     gchar const *xformat =
 258         "<?xml version='1.0' encoding='UTF-8' standalone='no'?>"
 259         "<!-- Created with Inkscape (http://www.inkscape.org/) -->"
 260         "<svg"
 261         "   xmlns:xml='http://www.w3.org/XML/1998/namespace'"
 262         "   xmlns:svg='http://www.w3.org/2000/svg'"
 263         "   xmlns='http://www.w3.org/2000/svg'"
 264         "   id='svg2'"
 265         "   height='64.000000'"
 266         "   width='64.000000'"
 267         "   y='0.00000000'"
 268         "   x='0.00000000'"
 269         "   version='1.0'>"
 270         "  <defs"
 271         "     id='defs3' />"
 272         "  <rect"
 273         "     id='rect1723'"
 274         "     style='fill:#fefefe;fill-opacity:1.0000000;stroke:#fe0101;stroke-opacity:1.0000000'"
 275         "     y='0.74437392'"
 276         "     x='0.52374262'"
 277         "     height='62.698864'"
 278         "     width='62.701584' />"
 279         "  <path"
 280         "     id='path1725'"
 281         "     style='fill:none;fill-opacity:0.75000000;fill-rule:evenodd;stroke:#fe0101;stroke-width:0.99443889px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1.0000000'"
 282         "     d='M 0.35436684,0.57368969 L 62.861950,63.081272' />"
 283         "  <path"
 284         "     id='path1727'"
 285         "     style='fill:none;fill-opacity:0.75000000;fill-rule:evenodd;stroke:#fe0101;stroke-width:0.99443889px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1.0000000'"
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 295         "  <text"
 296         "     xml:space='preserve'"
 297         "     id='text1644'"
 298         "     style='font-size:12.000000;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1.0000000;stroke:none;stroke-width:1.0000000px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1.0000000;font-family:Sans'"
 299         "     y='59.288345'"
 300         "     x='12.760736'><tspan"
 301         "       id='tspan1646'"
 302         "       y='59.288345'"
 303         "       x='12.760736'>%s</tspan></text>"
 304         "</svg>";
 305
 306     //Fill in the template
 307     char *cErrorMessage = (char *)errorMessage.c_str();
 308     gchar *xmlBuffer = g_strdup_printf(xformat, cErrorMessage);
 309
 310     //g_message("%s\n", xmlBuffer);
 311
 312     //now show it!
 313     showSvgFromMemory(xmlBuffer);
 314     g_free(xmlBuffer);
 315     showingBrokenImage = true;
 316
 317 }
 318
 319
 320
 321 static bool
 322 hasSuffix(const Glib::ustring &str, Glib::ustring &ext)
 323 {
 324     int strLen = str.length();
 325     int extLen = ext.length();
 326     if (extLen > strLen)
 327         {
 328         return false;
 329         }
 330     int strpos = strLen-1;
 331     for (int extpos = extLen-1 ; extpos>=0 ; extpos--, strpos--)
 332         {
 333         Glib::ustring::value_type ch = str[strpos];
 334         if (ch != ext[extpos])
 335             {
 336             if ( ((ch & 0xff80) != 0) ||
 337                  static_cast<Glib::ustring::value_type>( g_ascii_tolower( static_cast<gchar>(0x07f & ch) ) ) != ext[extpos] )
 338                 {
 339                 return false;
 340                 }
 341             }
 342         }
 343     return true;
 344 }
 345
 346
 347 /**
 348  * Return true if the image is loadable by Gdk, else false
 349  */
 350 static bool
 351 isValidImageIconFile(const Glib::ustring &fileName)
 352 {
 353     std::vector<Gdk::PixbufFormat>formats = Gdk::Pixbuf::get_formats();
 354     for (unsigned int i=0; i<formats.size(); i++)
 355         {
 356         Gdk::PixbufFormat format = formats[i];
 357         std::vector<Glib::ustring>extensions = format.get_extensions();
 358         for (unsigned int j=0; j<extensions.size(); j++)
 359             {
 360             Glib::ustring ext = extensions[j];
 361             if (hasSuffix(fileName, ext))
 362                 {
 363                 return true;
 364                 }
 365             }
 366         }
 367     return false;
 368 }
 369
 370 bool ImageIcon::show(const Glib::ustring &fileName)
 371 {
 372
 373     if (!Glib::file_test(fileName, Glib::FILE_TEST_EXISTS))
 374         return false;
 375
 376     gchar *fName = (gchar *)fileName.c_str();
 377     //g_message("fname:%s\n", fName);
 378
 379
 380     if (Glib::file_test(fileName, Glib::FILE_TEST_IS_REGULAR))
 381         {
 382         struct stat info;
 383         if (stat(fName, &info))
 384             {
 385             Glib::ustring err = "cannot get file info";
 386             showBrokenImage(err);
 387             return false;
 388             }
 389         long fileLen = info.st_size;
 390         if (fileLen > 0x150000L)
 391             {
 392             Glib::ustring err = "File too large";
 393             showBrokenImage(err);
 394             return false;
 395             }
 396         }
 397
 398     Glib::ustring svg = ".svg";
 399     Glib::ustring svgz = ".svgz";
 400
 401     if (hasSuffix(fileName, svg) || hasSuffix(fileName, svgz)   )
 402         {
 403         if (!showSvgFile(fileName))
 404             {
 405             showBrokenImage(bitmapError);
 406             return false;
 407             }
 408         return true;
 409         }
 410     else if (isValidImageIconFile(fileName))
 411         {
 412         if (!showBitmap(fileName))
 413             {
 414             showBrokenImage(bitmapError);
 415             return false;
 416             }
 417         return true;
 418         }
 419     else
 420         {
 421         showBrokenImage("unsupported file type");
 422         return false;
 423         }
 424 }
 425
 426
 427
 428
 429
 430
 431
 432 } // namespace Widget
 433 } // namespace UI
 434 } // namespace Inkscape
 435
 436
 437 /*#########################################################################
 438 ### E N D    O F    F I L E
 439 #########################################################################*/
 440
 441
 442