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Sourcecode: inkscape version File versions

imageicon.cpp

/*
 * A simple image display widget, using Inkscape's own rendering engine
 *
 * Authors:
 *   Bob Jamison
 *   Other dudes from The Inkscape Organization
 *
 * Copyright (C) 2004 The Inkscape Organization
 *
 * Released under GNU GPL, read the file 'COPYING' for more information
 */




#include "imageicon.h"
#include <sys/stat.h>
#include "svg-view-widget.h"
#include "document.h"
#include "inkscape.h"


namespace Inkscape
{
namespace UI
{
namespace Widget
{



typedef enum {
    SVG_TYPES,
    IMPORT_TYPES,
    EXPORT_TYPES
    } FileDialogType;


/*#########################################################################
### ImageIcon widget
#########################################################################*/


/**
 * Constructor
 */
00047 ImageIcon::ImageIcon()
{
    init();
}

/**
 * Construct from a file name
 */
00055 ImageIcon::ImageIcon(const Glib::ustring &fileName)
{
    init();
    showSvgFile(fileName);
}

/**
 * Copy Constructor
 */
00064 ImageIcon::ImageIcon(const ImageIcon &other) 
             : sigc::trackable(), Glib::ObjectBase(), Gtk::VBox()
{
    init();
    document           = other.document;
    viewerGtkmm        = other.viewerGtkmm;
    showingBrokenImage = other.showingBrokenImage;
}

/**
 * Destructor
 */
00076 ImageIcon::~ImageIcon()
{
    if (document)
        sp_document_unref(document);
}


/**
 * basic initialization, called by the various constructors
 */
00086 void ImageIcon::init()
{
    if (!INKSCAPE)
        inkscape_application_init("",false);
    document = NULL;
    viewerGtkmm = NULL;
    //set_size_request(150,150);
    showingBrokenImage = false;
}


bool ImageIcon::showSvgDocument(const SPDocument *docArg)
{

    if (document)
        sp_document_unref(document);

    SPDocument *doc = (SPDocument *)docArg;

    sp_document_ref(doc);
    document = doc;

    //This should remove it from the box, and free resources
    //if (viewerGtkmm)
    //    viewerGtkmm->destroy();

    GtkWidget *viewerGtk  = sp_svg_view_widget_new(doc);
    viewerGtkmm = Glib::wrap(viewerGtk);

    viewerGtkmm->show();
    pack_start(*viewerGtkmm, TRUE, TRUE, 0);

    //GtkWidget *vbox = (GtkWidget *)gobj();
    //gtk_box_pack_start(GTK_BOX(vbox), viewerGtk, TRUE, TRUE, 0);

    return true;
}

bool ImageIcon::showSvgFile(const Glib::ustring &theFileName)
{
    Glib::ustring fileName = theFileName;

    fileName = Glib::filename_to_utf8(fileName);

    SPDocument *doc = sp_document_new (fileName.c_str(), 0);
    if (!doc) {
        g_warning("SVGView: error loading document '%s'\n", fileName.c_str());
        return false;
    }

    showSvgDocument(doc);

    sp_document_unref(doc);

    return true;
}



bool ImageIcon::showSvgFromMemory(const char *xmlBuffer)
{
    if (!xmlBuffer)
        return false;

    gint len = (gint)strlen(xmlBuffer);
    SPDocument *doc = sp_document_new_from_mem(xmlBuffer, len, 0);
    if (!doc) {
        g_warning("SVGView: error loading buffer '%s'\n",xmlBuffer);
        return false;
    }

    showSvgDocument(doc);

    sp_document_unref(doc);

    return true;
}



00166 bool ImageIcon::showBitmap(const Glib::ustring &theFileName)
{
    Glib::ustring fileName = theFileName;


    /*#####################################
    # LET'S HAVE SOME FUN WITH SVG!
    # Instead of just loading an image, why
    # don't we make a lovely little svg and
    # display it nicely?
    #####################################*/

    //Arbitrary size of svg doc -- rather 'portrait' shaped
    gint previewWidth  = 400;
    gint previewHeight = 600;

    //Get some image info. Smart pointer does not need to be deleted
    Glib::RefPtr<Gdk::Pixbuf> img = Gdk::Pixbuf::create_from_file(fileName);
    gint imgWidth  = img->get_width();
    gint imgHeight = img->get_height();

    //Find the minimum scale to fit the image inside the preview area
    double scaleFactorX = (0.9 *(double)previewWidth)  / ((double)imgWidth);
    double scaleFactorY = (0.9 *(double)previewHeight) / ((double)imgHeight);
    double scaleFactor = scaleFactorX;
    if (scaleFactorX > scaleFactorY)
        scaleFactor = scaleFactorY;

    //Now get the resized values
    gint scaledImgWidth  = (int) (scaleFactor * (double)imgWidth);
    gint scaledImgHeight = (int) (scaleFactor * (double)imgHeight);

    //center the image on the area
    gint imgX = (previewWidth  - scaledImgWidth)  / 2;
    gint imgY = (previewHeight - scaledImgHeight) / 2;

    //wrap a rectangle around the image
    gint rectX      = imgX-1;
    gint rectY      = imgY-1;
    gint rectWidth  = scaledImgWidth +2;
    gint rectHeight = scaledImgHeight+2;

    //Our template.  Modify to taste
    gchar const *xformat =
          "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
          "<svg\n"
          "xmlns=\"http://www.w3.org/2000/svg\"\n"
          "xmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
          "width=\"%d\" height=\"%d\">\n"
          "<rect\n"
          "  style=\"fill:#eeeeee;stroke:none\"\n"
          "  x=\"-100\" y=\"-100\" width=\"4000\" height=\"4000\"/>\n"
          "<image x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\"\n"
          "xlink:href=\"%s\"/>\n"
          "<rect\n"
          "  style=\"fill:none;"
          "    stroke:#000000;stroke-width:1.0;"
          "    stroke-linejoin:miter;stroke-opacity:1.0000000;"
          "    stroke-miterlimit:4.0000000;stroke-dasharray:none\"\n"
          "  x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\"/>\n"
          "</svg>\n\n";

    //if (!Glib::get_charset()) //If we are not utf8
    fileName = Glib::filename_to_utf8(fileName);

    //Fill in the template
    /* FIXME: Do proper XML quoting for fileName. */
    gchar *xmlBuffer = g_strdup_printf(xformat,
           previewWidth, previewHeight,
           imgX, imgY, scaledImgWidth, scaledImgHeight,
           fileName.c_str(),
           rectX, rectY, rectWidth, rectHeight);

    //g_message("%s\n", xmlBuffer);

    //now show it!
    showSvgFromMemory(xmlBuffer);
    g_free(xmlBuffer);

    return true;
}



00250 void ImageIcon::showBrokenImage(const Glib::ustring &errorMessage)
{
    //Are we already showing it?
    if (showingBrokenImage)
        return;

    //Our template.  Modify to taste
    gchar const *xformat =
        "<?xml version='1.0' encoding='UTF-8' standalone='no'?>"
        "<!-- Created with Inkscape (http://www.inkscape.org/) -->"
        "<svg"
        "   xmlns:xml='http://www.w3.org/XML/1998/namespace'"
        "   xmlns:svg='http://www.w3.org/2000/svg'"
        "   xmlns='http://www.w3.org/2000/svg'"
        "   id='svg2'"
        "   height='64.000000'"
        "   width='64.000000'"
        "   y='0.00000000'"
        "   x='0.00000000'"
        "   version='1.0'>"
        "  <defs"
        "     id='defs3' />"
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        "     id='rect1723'"
        "     style='fill:#fefefe;fill-opacity:1.0000000;stroke:#fe0101;stroke-opacity:1.0000000'"
        "     y='0.74437392'"
        "     x='0.52374262'"
        "     height='62.698864'"
        "     width='62.701584' />"
        "  <path"
        "     id='path1725'"
        "     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'"
        "     d='M 0.35436684,0.57368969 L 62.861950,63.081272' />"
        "  <path"
        "     id='path1727'"
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        "     d='M 0.53194379,63.258849 L 63.217104,0.92884358' />"
        "  <path"
        "     id='text1729'"
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41.368718,45.469112 40.824890,45.469112 C 39.581841,45.469112 38.727240,45.282655 38.261107,44.909741 C 37.798842,44.536826 37.567715,44.037667 37.567715,43.412255 C 37.567715,43.334569 37.571603,43.229686 37.579369,43.097614 L 39.880948,43.359818 C 39.939213,43.573463 40.028563,43.721078 40.148979,43.802652 C 40.323782,43.923068 40.543255,43.983282 40.807407,43.983282 C 41.149246,43.983282 41.403683,43.891992 41.570719,43.709423 C 41.741633,43.526854 41.827095,43.208315 41.827095,42.753827 L 41.827095,41.815713 C 41.594018,42.091521 41.360952,42.291572 41.127885,42.415877 C 40.762737,42.610101 40.368452,42.707218 39.945050,42.707218 C 39.117637,42.707218 38.449503,42.345958 37.940629,41.623428 C 37.579369,41.110676 37.398739,40.432827 37.398739,39.589880 C 37.398739,38.626528 37.631806,37.892353 38.097949,37.387358 C 38.564093,36.882372 39.173962,36.629883 39.927568,36.629874 C 40.409244,36.629883 40.805468,36.711457 41.116230,36.874595 C 41.430871,37.037753 41.724151,37.307733 41.996080,37.684526 L 41.996080,36.769712 M 39.764410,39.770510 C 39.764410,40.217232 39.859578,40.549365 40.049923,40.766898 C 40.240269,40.980544 40.490818,41.087366 40.801580,41.087366 C 41.096799,41.087366 41.343470,40.976665 41.541582,40.755243 C 41.743572,40.529943 41.844577,40.191983 41.844577,39.741383 C 41.844577,39.290773 41.739694,38.946996 41.529937,38.710041 C 41.320160,38.469198 41.063784,38.348781 40.760798,38.348781 C 40.457802,38.348781 40.215020,38.459492 40.032451,38.680904 C 39.853760,38.898437 39.764410,39.261646 39.764410,39.770510 M 52.507607,40.452248 L 47.752946,40.452248 C 47.795667,40.832929 47.898612,41.116503 48.061759,41.302961 C 48.290948,41.570992 48.590055,41.705012 48.959091,41.705012 C 49.192158,41.705012 49.413580,41.646738 49.623347,41.530200 C 49.751530,41.456402 49.889429,41.326270 50.037043,41.139813 L 52.373587,41.355397 C 52.016205,41.976922 51.585026,42.423643 51.080040,42.695563 C 50.575044,42.963594 49.850586,43.097614 48.906644,43.097614 C 48.087008,43.097614 47.442184,42.983015 46.972153,42.753827 C 46.502121,42.520760 46.111734,42.153673 45.800972,41.652565 C 45.494088,41.147579 45.340656,40.555192 45.340656,39.875394 C 45.340656,38.908153 45.649469,38.125420 46.267115,37.527195 C 46.888640,36.928991 47.745170,36.629883 48.836725,36.629874 C 49.722393,36.629883 50.421612,36.763894 50.934375,37.031925 C 51.447127,37.299956 51.837514,37.688414 52.105555,38.197278 C 52.373577,38.706152 52.507597,39.368469 52.507607,40.184217 L 52.507607,40.452248 M 50.095317,39.316022 C 50.048698,38.857655 49.924393,38.529411 49.722403,38.331299 C 49.524281,38.133187 49.262077,38.034131 48.935782,38.034131 C 48.558979,38.034131 48.257932,38.183684 48.032632,38.482792 C 47.888896,38.669259 47.797616,38.946996 47.758774,39.316022 L 50.095317,39.316022' />"
        "  <text"
        "     xml:space='preserve'"
        "     id='text1644'"
        "     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:Bitstream Vera Sans'"
        "     y='59.288345'"
        "     x='12.760736'><tspan"
        "       id='tspan1646'"
        "       y='59.288345'"
        "       x='12.760736'>%s</tspan></text>"
        "</svg>";

    //Fill in the template
    char *cErrorMessage = (char *)errorMessage.c_str();
    gchar *xmlBuffer = g_strdup_printf(xformat, cErrorMessage);

    //g_message("%s\n", xmlBuffer);

    //now show it!
    showSvgFromMemory(xmlBuffer);
    g_free(xmlBuffer);
    showingBrokenImage = true;

}



static bool
hasSuffix(const Glib::ustring &str, Glib::ustring &ext)
{
    int strLen = str.length();
    int extLen = ext.length();
    if (extLen > strLen)
        {
        return false;
        }
    int strpos = strLen-1;
    for (int extpos = extLen-1 ; extpos>=0 ; extpos--, strpos--)
        {
        Glib::ustring::value_type ch = str[strpos];
        if (ch != ext[extpos])
            {
            if ( ((ch & 0xff80) != 0) ||
                 static_cast<Glib::ustring::value_type>( g_ascii_tolower( static_cast<gchar>(0x07f & ch) ) ) != ext[extpos] )
                {
                return false;
                }
            }
        }
    return true;
}


/**
 * Return true if the image is loadable by Gdk, else false
 */
static bool
isValidImageIconFile(const Glib::ustring &fileName)
{
    std::vector<Gdk::PixbufFormat>formats = Gdk::Pixbuf::get_formats();
    for (unsigned int i=0; i<formats.size(); i++)
        {
        Gdk::PixbufFormat format = formats[i];
        std::vector<Glib::ustring>extensions = format.get_extensions();
        for (unsigned int j=0; j<extensions.size(); j++)
            {
            Glib::ustring ext = extensions[j];
            if (hasSuffix(fileName, ext))
                {
                return true;
                }
            }
        }
    return false;
}

bool ImageIcon::show(const Glib::ustring &fileName)
{

    if (!Glib::file_test(fileName, Glib::FILE_TEST_EXISTS))
        return false;

    gchar *fName = (gchar *)fileName.c_str();
    //g_message("fname:%s\n", fName);


    if (Glib::file_test(fileName, Glib::FILE_TEST_IS_REGULAR))
        {
        struct stat info;
        if (stat(fName, &info))
            {
            Glib::ustring err = "cannot get file info";
            showBrokenImage(err);
            return false;
            }
        long fileLen = info.st_size;
        if (fileLen > 0x150000L)
            {
            Glib::ustring err = "File too large";
            showBrokenImage(err);
            return false;
            }
        }

    Glib::ustring svg = ".svg";
    Glib::ustring svgz = ".svgz";

    if (hasSuffix(fileName, svg) || hasSuffix(fileName, svgz)   )
        {
        if (!showSvgFile(fileName))
            {
            showBrokenImage(bitmapError);
            return false;
            }
        return true;
        }
    else if (isValidImageIconFile(fileName))
        {
        if (!showBitmap(fileName))
            {
            showBrokenImage(bitmapError);
            return false;
            }
        return true;
        }
    else
        {
        showBrokenImage("unsupported file type");
        return false;
        }
}







} // namespace Widget
} // namespace UI
} // namespace Inkscape


/*#########################################################################
### E N D    O F    F I L E
#########################################################################*/




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