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-rw-r--r--src/ui/dialog/svg-preview.cpp477
1 files changed, 477 insertions, 0 deletions
diff --git a/src/ui/dialog/svg-preview.cpp b/src/ui/dialog/svg-preview.cpp
new file mode 100644
index 0000000..2d6cc4e
--- /dev/null
+++ b/src/ui/dialog/svg-preview.cpp
@@ -0,0 +1,477 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/**
+ * @file
+ * Implementation of the file dialog interfaces defined in filedialogimpl.h.
+ */
+/* Authors:
+ * Bob Jamison
+ * Joel Holdsworth
+ * Bruno Dilly
+ * Other dudes from The Inkscape Organization
+ * Abhishek Sharma
+ *
+ * Copyright (C) 2004-2007 Bob Jamison
+ * Copyright (C) 2006 Johan Engelen <johan@shouraizou.nl>
+ * Copyright (C) 2007-2008 Joel Holdsworth
+ * Copyright (C) 2004-2007 The Inkscape Organization
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <iostream>
+#include <fstream>
+
+#include <glibmm/i18n.h>
+#include <glib/gstdio.h> // GStatBuf
+
+#include "svg-preview.h"
+
+#include "document.h"
+#include "ui/view/svg-view-widget.h"
+
+namespace Inkscape {
+namespace UI {
+namespace Dialog {
+
+/*#########################################################################
+### SVG Preview Widget
+#########################################################################*/
+
+bool SVGPreview::setDocument(SPDocument *doc)
+{
+ if (viewer) {
+ viewer->setDocument(doc);
+ } else {
+ viewer = Gtk::manage(new Inkscape::UI::View::SVGViewWidget(doc));
+ pack_start(*viewer, true, true);
+ }
+
+ if (document) {
+ delete document;
+ }
+ document = doc;
+
+ show_all();
+
+ return true;
+}
+
+
+bool SVGPreview::setFileName(Glib::ustring &theFileName)
+{
+ Glib::ustring fileName = theFileName;
+
+ fileName = Glib::filename_to_utf8(fileName);
+
+ /**
+ * I don't know why passing false to keepalive is bad. But it
+ * prevents the display of an svg with a non-ascii filename
+ */
+ SPDocument *doc = SPDocument::createNewDoc(fileName.c_str(), true);
+ if (!doc) {
+ g_warning("SVGView: error loading document '%s'\n", fileName.c_str());
+ return false;
+ }
+
+ setDocument(doc);
+
+ return true;
+}
+
+
+
+bool SVGPreview::setFromMem(char const *xmlBuffer)
+{
+ if (!xmlBuffer)
+ return false;
+
+ gint len = (gint)strlen(xmlBuffer);
+ SPDocument *doc = SPDocument::createNewDocFromMem(xmlBuffer, len, false);
+ if (!doc) {
+ g_warning("SVGView: error loading buffer '%s'\n", xmlBuffer);
+ return false;
+ }
+
+ setDocument(doc);
+
+ return true;
+}
+
+
+
+void SVGPreview::showImage(Glib::ustring &theFileName)
+{
+ Glib::ustring fileName = theFileName;
+
+ // Let's get real width and height from SVG file. These are template
+ // files so we assume they are well formed.
+
+ // std::cout << "SVGPreview::showImage: " << theFileName << std::endl;
+ std::string width;
+ std::string height;
+
+ /*#####################################
+ # 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(nullptr);
+ try
+ {
+ img = Gdk::Pixbuf::create_from_file(fileName);
+ }
+ catch (const Glib::FileError &e)
+ {
+ g_message("caught Glib::FileError in SVGPreview::showImage");
+ return;
+ }
+ catch (const Gdk::PixbufError &e)
+ {
+ g_message("Gdk::PixbufError in SVGPreview::showImage");
+ return;
+ }
+ catch (...)
+ {
+ g_message("Caught ... in SVGPreview::showImage");
+ return;
+ }
+
+ gint imgWidth = img->get_width();
+ gint imgHeight = img->get_height();
+
+ Glib::ustring svg = ".svg";
+ if (hasSuffix(fileName, svg)) {
+ std::ifstream input(theFileName.c_str());
+ if( !input ) {
+ std::cerr << "SVGPreview::showImage: Failed to open file: " << theFileName << std::endl;
+ } else {
+
+ Glib::ustring token;
+
+ Glib::MatchInfo match_info;
+ Glib::RefPtr<Glib::Regex> regex1 = Glib::Regex::create("width=\"(.*)\"");
+ Glib::RefPtr<Glib::Regex> regex2 = Glib::Regex::create("height=\"(.*)\"");
+
+ while( !input.eof() && (height.empty() || width.empty()) ) {
+
+ input >> token;
+ // std::cout << "|" << token << "|" << std::endl;
+
+ if (regex1->match(token, match_info)) {
+ width = match_info.fetch(1).raw();
+ }
+
+ if (regex2->match(token, match_info)) {
+ height = match_info.fetch(1).raw();
+ }
+
+ }
+ }
+ }
+
+ // TODO: replace int to string conversion with std::to_string when fully C++11 compliant
+ if (height.empty() || width.empty()) {
+ std::ostringstream s_width;
+ std::ostringstream s_height;
+ s_width << imgWidth;
+ s_height << imgHeight;
+ width = s_width.str();
+ height = s_height.str();
+ }
+
+ // 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 = R"A(
+<svg width="%d" height="%d"
+ xmlns="http://www.w3.org/2000/svg"
+ xmlns:xlink="http://www.w3.org/1999/xlink">
+ <rect width="100%" height="100%" style="fill:#eeeeee"/>
+ <image x="%d" y="%d" width="%d" height="%d" xlink:href="%s"/>
+ <rect x="%d" y="%d" width="%d" height="%d" style="fill:none;stroke:black"/>
+ <text x="50%" y="55%" style="font-family:sans-serif;font-size:24px;text-anchor:middle">%s x %s</text>
+</svg>
+)A";
+
+ // if (!Glib::get_charset()) //If we are not utf8
+ fileName = Glib::filename_to_utf8(fileName);
+ // Filenames in xlinks are decoded, so any % will break without this.
+ auto encodedName = Glib::uri_escape_string(fileName);
+
+ // Fill in the template
+ /* FIXME: Do proper XML quoting for fileName. */
+ gchar *xmlBuffer =
+ g_strdup_printf(xformat, previewWidth, previewHeight, imgX, imgY, scaledImgWidth, scaledImgHeight,
+ encodedName.c_str(), rectX, rectY, rectWidth, rectHeight, width.c_str(), height.c_str() );
+
+ // g_message("%s\n", xmlBuffer);
+
+ // now show it!
+ setFromMem(xmlBuffer);
+ g_free(xmlBuffer);
+}
+
+
+
+void SVGPreview::showNoPreview()
+{
+ // Are we already showing it?
+ if (showingNoPreview)
+ return;
+
+ // Our template. Modify to taste
+ gchar const *xformat = R"B(
+<svg width="400" height="600"
+ xmlns="http://www.w3.org/2000/svg"
+ xmlns:xlink="http://www.w3.org/1999/xlink">
+ <g transform="translate(-160,90)" style="opacity:0.10">
+ <path style="fill:white"
+ d="M 397.64309 320.25301 L 280.39197 282.517 L 250.74227 124.83447 L 345.08225
+ 29.146783 L 393.59996 46.667064 L 483.89679 135.61619 L 397.64309 320.25301 z"/>
+ <path d="M 476.95792 339.17168 C 495.78197 342.93607 499.54842 356.11361 495.78197 359.87802
+ C 492.01856 363.6434 482.6065 367.40781 475.07663 361.76014 C 467.54478
+ 356.11361 467.54478 342.93607 476.95792 339.17168 z"
+ id="droplet01" />
+ <path d="M 286.46194 340.42914 C 284.6277 340.91835 269.30405 327.71337 257.16909 333.8338
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+ 287.18046 343.1206 286.46194 340.42914 z"
+ id= "droplet02"/>
+ <path d="M 510.35756 306.92856 C 520.59494 304.36879 544.24333 306.92856 540.47688 321.98634
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+ id="droplet03"/>
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+ 274.45012 297.36372 269.98057 L 290.92738 261.61333 z"
+ id="mountainDroplet"/>
+ </g>
+ <text xml:space="preserve" x="200" y="320"
+ style="font-size:32px;font-weight:bold;text-anchor:middle">%s</text>
+</svg>
+)B";
+
+ // Fill in the template
+ gchar *xmlBuffer = g_strdup_printf(xformat, _("No preview"));
+
+ // g_message("%s\n", xmlBuffer);
+
+ // Now show it!
+ setFromMem(xmlBuffer);
+ g_free(xmlBuffer);
+ showingNoPreview = true;
+}
+
+
+/**
+ * Inform the user that the svg file is too large to be displayed.
+ * This does not check for sizes of embedded images (yet)
+ */
+void SVGPreview::showTooLarge(long fileLength)
+{
+ // Our template. Modify to taste
+ gchar const *xformat = R"C(
+<svg width="400" height="600"
+ xmlns="http://www.w3.org/2000/svg"
+ xmlns:xlink="http://www.w3.org/1999/xlink">
+ <g transform="translate(-160,90)" style="opacity:0.10">
+ <path style="fill:white"
+ d="M 397.64309 320.25301 L 280.39197 282.517 L 250.74227 124.83447 L 345.08225
+ 29.146783 L 393.59996 46.667064 L 483.89679 135.61619 L 397.64309 320.25301 z"/>
+ <path d="M 476.95792 339.17168 C 495.78197 342.93607 499.54842 356.11361 495.78197 359.87802
+ C 492.01856 363.6434 482.6065 367.40781 475.07663 361.76014 C 467.54478
+ 356.11361 467.54478 342.93607 476.95792 339.17168 z"
+ id="droplet01" />
+ <path d="M 286.46194 340.42914 C 284.6277 340.91835 269.30405 327.71337 257.16909 333.8338
+ C 245.03722 339.95336 236.89276 353.65666 248.22676 359.27982 C 259.56184 364.90298
+ 267.66433 358.41867 277.60113 351.44119 C 287.53903 344.46477
+ 287.18046 343.1206 286.46194 340.42914 z"
+ id= "droplet02"/>
+ <path d="M 510.35756 306.92856 C 520.59494 304.36879 544.24333 306.92856 540.47688 321.98634
+ C 536.71354 337.04806 504.71297 331.39827 484.00371 323.87156 C 482.12141
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+ id="droplet03"/>
+ <path d="M 359.2403 21.362537 C 347.92693 21.362537 336.6347 25.683095 327.96556 34.35223
+ L 173.87387 188.41466 C 165.37697 196.9114 161.1116 207.95813 160.94269 219.04577
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+ 275.37038 359.88393 275.50997 L 360.76161 284.72563 C 343.2235 282.91785 306.11346
+ 274.45012 297.36372 269.98057 L 290.92738 261.61333 z"
+ id="mountainDroplet"/>
+ </g>
+ <text xml:space="preserve" x="200" y="280"
+ style="font-size:20px;font-weight:bold;text-anchor:middle">%.1f MB</text>
+ <text xml:space="preserve" x="200" y="360"
+ style="font-size:20px;font-weight:bold;text-anchor:middle">%s</text>
+</svg>
+)C";
+
+
+ // Fill in the template
+ double floatFileLength = ((double)fileLength) / 1048576.0;
+ // printf("%ld %f\n", fileLength, floatFileLength);
+
+ gchar *xmlBuffer =
+ g_strdup_printf(xformat, floatFileLength, _("Too large for preview"));
+
+ // g_message("%s\n", xmlBuffer);
+
+ // now show it!
+ setFromMem(xmlBuffer);
+ g_free(xmlBuffer);
+}
+
+bool SVGPreview::set(Glib::ustring &fileName, int dialogType)
+{
+
+ if (!Glib::file_test(fileName, Glib::FILE_TEST_EXISTS)) {
+ showNoPreview();
+ return false;
+ }
+
+ if (Glib::file_test(fileName, Glib::FILE_TEST_IS_DIR)) {
+ showNoPreview();
+ return false;
+ }
+
+ if (Glib::file_test(fileName, Glib::FILE_TEST_IS_REGULAR)) {
+ Glib::ustring fileNameUtf8 = Glib::filename_to_utf8(fileName);
+ gchar *fName = const_cast<gchar *>(
+ fileNameUtf8.c_str()); // const-cast probably not necessary? (not necessary on Windows version of stat())
+ GStatBuf info;
+ if (g_stat(fName, &info)) // stat returns 0 upon success
+ {
+ g_warning("SVGPreview::set() : %s : %s", fName, strerror(errno));
+ return false;
+ }
+ if (info.st_size > 0xA00000L) {
+ showingNoPreview = false;
+ showTooLarge(info.st_size);
+ return false;
+ }
+ }
+
+ Glib::ustring svg = ".svg";
+ Glib::ustring svgz = ".svgz";
+
+ if ((dialogType == SVG_TYPES || dialogType == IMPORT_TYPES) &&
+ (hasSuffix(fileName, svg) || hasSuffix(fileName, svgz))) {
+ bool retval = setFileName(fileName);
+ showingNoPreview = false;
+ return retval;
+ } else if (isValidImageFile(fileName)) {
+ showImage(fileName);
+ showingNoPreview = false;
+ return true;
+ } else {
+ showNoPreview();
+ return false;
+ }
+}
+
+
+SVGPreview::SVGPreview()
+ : Gtk::Box(Gtk::ORIENTATION_VERTICAL)
+ , document(nullptr)
+ , viewer(nullptr)
+ , showingNoPreview(false)
+{
+ set_size_request(200, 300);
+}
+
+SVGPreview::~SVGPreview()
+{
+ if (viewer) {
+ viewer->setDocument(nullptr);
+ }
+ delete document;
+}
+
+} // namespace Dialog
+} // namespace UI
+} // namespace Inkscape
+
+/*
+ Local Variables:
+ mode:c++
+ c-file-style:"stroustrup"
+ c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+ indent-tabs-mode:nil
+ fill-column:99
+ End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-12 12:39:38 +0000