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 : public ImageLoaderBackend
  42 {
  43 public:
  44         ~ImageLoaderCOLLECTION() override;
  45
  46         void init(AreaUpdatedCb area_updated_cb, SizePreparedCb size_prepared_cb, AreaPreparedCb area_prepared_cb, gpointer data) override;
  47         gboolean write(const guchar *buf, gsize &chunk_size, gsize count, GError **error) override;
  48         GdkPixbuf *get_pixbuf() override;
  49         gchar *get_format_name() override;
  50         gchar **get_format_mime_types() override;
  51
  52 private:
  53         AreaUpdatedCb area_updated_cb;
  54         gpointer data;
  55
  56         GdkPixbuf *pixbuf;
  57 };
  58
  59 gboolean ImageLoaderCOLLECTION::write(const guchar *, gsize &chunk_size, gsize count, GError **)
  60 {
  61         auto il = static_cast<ImageLoader *>(data);
  62
  63         #define LINE_LENGTH 1000
  64
  65         gboolean ret = FALSE;
  66         gchar *randname;
  67         gchar *cmd_line;
  68         FILE *fp = nullptr;
  69         gint line_count = 0;
  70         GString *file_names = g_string_new(nullptr);
  71         gchar line[LINE_LENGTH];
  72         gchar **split_line = nullptr;
  73         gchar *cache_found;
  74         gchar *pathl;
  75
  76         if (runcmd("which montage >/dev/null 2>&1") == 0)
  77                 {
  78                 pathl = path_from_utf8(il->fd->path);
  79                 fp = fopen(pathl, "r");
  80                 g_free(pathl);
  81                 if (fp)
  82                         {
  83                         while(fgets(line, LINE_LENGTH, fp) && line_count < options->thumbnails.collection_preview)
  84                                 {
  85                                 if (line[0] && line[0] != '#')
  86                                         {
  87                                         split_line = g_strsplit(line, "\"", 4);
  88                                         cache_found = cache_find_location(CACHE_TYPE_THUMB, split_line[1]);
  89                                         if (cache_found)
  90                                                 {
  91                                                 g_string_append_printf(file_names, "\"%s\" ", cache_found);
  92                                                 line_count++;
  93                                                 }
  94                                         g_free(cache_found);
  95                                         }
  96                                         if (split_line)
  97                                                 {
  98                                                 g_strfreev(split_line);
  99                                                 }
 100                                         split_line = nullptr;
 101                                 }
 102                         fclose(fp);
 103
 104                         if (file_names->len > 0)
 105                                 {
 106                                 randname = g_strdup("/tmp/geeqie_collection_XXXXXX.png");
 107                                 g_mkstemp(randname);
 108
 109                                 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);
 110
 111                                 runcmd(cmd_line);
 112                                 pixbuf = gdk_pixbuf_new_from_file(randname, nullptr);
 113                                 if (pixbuf)
 114                                         {
 115                                         area_updated_cb(nullptr, 0, 0, gdk_pixbuf_get_width(pixbuf), gdk_pixbuf_get_height(pixbuf), data);
 116                                         }
 117
 118                                 unlink(randname);
 119                                 g_free(randname);
 120                                 g_free(cmd_line);
 121
 122                                 ret = TRUE;
 123                                 }
 124
 125                         g_string_free(file_names, TRUE);
 126                         }
 127                 }
 128         chunk_size = count;
 129         return ret;
 130 }
 131
 132 void ImageLoaderCOLLECTION::init(AreaUpdatedCb area_updated_cb, SizePreparedCb, AreaPreparedCb, gpointer data)
 133 {
 134         this->area_updated_cb = area_updated_cb;
 135         this->data = data;
 136 }
 137
 138 GdkPixbuf *ImageLoaderCOLLECTION::get_pixbuf()
 139 {
 140         return pixbuf;
 141 }
 142
 143 gchar *ImageLoaderCOLLECTION::get_format_name()
 144 {
 145         return g_strdup("collection");
 146 }
 147
 148 gchar **ImageLoaderCOLLECTION::get_format_mime_types()
 149 {
 150         static const gchar *mime[] = {"image/png", nullptr};
 151         return g_strdupv(const_cast<gchar **>(mime));
 152 }
 153
 154 ImageLoaderCOLLECTION::~ImageLoaderCOLLECTION()
 155 {
 156         if (pixbuf) g_object_unref(pixbuf);
 157 }
 158
 159 } // namespace
 160
 161 std::unique_ptr<ImageLoaderBackend> get_image_loader_backend_collection()
 162 {
 163         return std::make_unique<ImageLoaderCOLLECTION>();
 164 }
 165
 166 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */