src/image-load-collection.cc

   1 /*
   2  * Copyright (C) 20018 - The Geeqie Team
   3  *
   4  * Author: Colin Clark
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 #include "image-load-collection.h"
  22
  23 #include <unistd.h>
  24
  25 #include <cstdio>
  26
  27 #include <gdk-pixbuf/gdk-pixbuf.h>
  28 #include <glib-object.h>
  29 #include <glib.h>
  30
  31 #include "cache.h"
  32 #include "filedata.h"
  33 #include "image-load.h"
  34 #include "misc.h"
  35 #include "options.h"
  36 #include "ui-fileops.h"
  37
  38 namespace
  39 {
  40
  41 struct ImageLoaderCOLLECTION {
  42         ImageLoaderBackendCbAreaUpdated area_updated_cb;
  43         ImageLoaderBackendCbSize size_cb;
  44         ImageLoaderBackendCbAreaPrepared area_prepared_cb;
  45         gpointer data;
  46         GdkPixbuf *pixbuf;
  47         guint requested_width;
  48         guint requested_height;
  49         gboolean abort;
  50 };
  51
  52 gboolean image_loader_collection_write(gpointer loader, const guchar *, gsize &chunk_size, gsize count, GError **)
  53 {
  54         auto ld = static_cast<ImageLoaderCOLLECTION *>(loader);
  55         auto il = static_cast<ImageLoader *>(ld->data);
  56
  57         #define LINE_LENGTH 1000
  58
  59         gboolean ret = FALSE;
  60         gchar *randname;
  61         gchar *cmd_line;
  62         FILE *fp = nullptr;
  63         gint line_count = 0;
  64         GString *file_names = g_string_new(nullptr);
  65         gchar line[LINE_LENGTH];
  66         gchar **split_line = nullptr;
  67         gchar *cache_found;
  68         gchar *pathl;
  69
  70         if (runcmd("which montage >/dev/null 2>&1") == 0)
  71                 {
  72                 pathl = path_from_utf8(il->fd->path);
  73                 fp = fopen(pathl, "r");
  74                 g_free(pathl);
  75                 if (fp)
  76                         {
  77                         while(fgets(line, LINE_LENGTH, fp) && line_count < options->thumbnails.collection_preview)
  78                                 {
  79                                 if (line[0] && line[0] != '#')
  80                                         {
  81                                         split_line = g_strsplit(line, "\"", 4);
  82                                         cache_found = cache_find_location(CACHE_TYPE_THUMB, split_line[1]);
  83                                         if (cache_found)
  84                                                 {
  85                                                 g_string_append_printf(file_names, "\"%s\" ", cache_found);
  86                                                 line_count++;
  87                                                 }
  88                                         g_free(cache_found);
  89                                         }
  90                                         if (split_line)
  91                                                 {
  92                                                 g_strfreev(split_line);
  93                                                 }
  94                                         split_line = nullptr;
  95                                 }
  96                         fclose(fp);
  97
  98                         if (file_names->len > 0)
  99                                 {
 100                                 randname = g_strdup("/tmp/geeqie_collection_XXXXXX.png");
 101                                 g_mkstemp(randname);
 102
 103                                 cmd_line = g_strdup_printf("montage %s -geometry %dx%d+1+1 %s >/dev/null 2>&1", file_names->str, options->thumbnails.max_width, options->thumbnails.max_height, randname);
 104
 105                                 runcmd(cmd_line);
 106                                 ld->pixbuf = gdk_pixbuf_new_from_file(randname, nullptr);
 107                                 if (ld->pixbuf)
 108                                         {
 109                                         ld->area_updated_cb(loader, 0, 0, gdk_pixbuf_get_width(ld->pixbuf), gdk_pixbuf_get_height(ld->pixbuf), ld->data);
 110                                         }
 111
 112                                 unlink(randname);
 113                                 g_free(randname);
 114                                 g_free(cmd_line);
 115
 116                                 ret = TRUE;
 117                                 }
 118
 119                         g_string_free(file_names, TRUE);
 120                         }
 121                 }
 122         chunk_size = count;
 123         return ret;
 124 }
 125
 126 gpointer image_loader_collection_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
 127 {
 128         auto loader = g_new0(ImageLoaderCOLLECTION, 1);
 129         loader->area_updated_cb = area_updated_cb;
 130         loader->size_cb = size_cb;
 131         loader->area_prepared_cb = area_prepared_cb;
 132         loader->data = data;
 133         return loader;
 134 }
 135
 136 void image_loader_collection_set_size(gpointer loader, int width, int height)
 137 {
 138         auto ld = static_cast<ImageLoaderCOLLECTION *>(loader);
 139         ld->requested_width = width;
 140         ld->requested_height = height;
 141 }
 142
 143 GdkPixbuf* image_loader_collection_get_pixbuf(gpointer loader)
 144 {
 145         auto ld = static_cast<ImageLoaderCOLLECTION *>(loader);
 146         return ld->pixbuf;
 147 }
 148
 149 gchar* image_loader_collection_get_format_name(gpointer)
 150 {
 151         return g_strdup("collection");
 152 }
 153
 154 gchar** image_loader_collection_get_format_mime_types(gpointer)
 155 {
 156         static const gchar *mime[] = {"image/png", nullptr};
 157         return g_strdupv(const_cast<gchar **>(mime));
 158 }
 159
 160 gboolean image_loader_collection_close(gpointer, GError **)
 161 {
 162         return TRUE;
 163 }
 164
 165 void image_loader_collection_abort(gpointer loader)
 166 {
 167         auto ld = static_cast<ImageLoaderCOLLECTION *>(loader);
 168         ld->abort = TRUE;
 169 }
 170
 171 void image_loader_collection_free(gpointer loader)
 172 {
 173         auto ld = static_cast<ImageLoaderCOLLECTION *>(loader);
 174         if (ld->pixbuf) g_object_unref(ld->pixbuf);
 175         g_free(ld);
 176 }
 177
 178 } // namespace
 179
 180 void image_loader_backend_set_collection(ImageLoaderBackend *funcs)
 181 {
 182         funcs->loader_new = image_loader_collection_new;
 183         funcs->set_size = image_loader_collection_set_size;
 184         funcs->write = image_loader_collection_write;
 185         funcs->get_pixbuf = image_loader_collection_get_pixbuf;
 186         funcs->close = image_loader_collection_close;
 187         funcs->abort = image_loader_collection_abort;
 188         funcs->free = image_loader_collection_free;
 189         funcs->get_format_name = image_loader_collection_get_format_name;
 190         funcs->get_format_mime_types = image_loader_collection_get_format_mime_types;
 191 }
 192
 193 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */