add lisp packages

lisp/emacs-application-framework/app/image-viewer/buffer.py

@@ -0,0 +1,68 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+# Copyright (C) 2018 Andy Stewart
+#
+# Author:     Andy Stewart <lazycat.manatee@gmail.com>
+# Maintainer: Andy Stewart <lazycat.manatee@gmail.com>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from PyQt5.QtCore import QUrl
+from PyQt5.QtGui import QColor
+from core.browser import BrowserBuffer
+from core.utils import PostGui
+from pathlib import Path
+import os
+
+class AppBuffer(BrowserBuffer):
+    def __init__(self, buffer_id, url, config_dir, arguments, emacs_var_dict, module_path):
+        BrowserBuffer.__init__(self, buffer_id, url, config_dir, arguments, emacs_var_dict, module_path, False)
+
+        self.load_image(url)
+
+    def load_image(self, url):
+        self.url = url
+        self.parent_dir = os.path.abspath(os.path.join(url, os.pardir))
+        self.image_name = os.path.basename(url)
+        self.buffer_widget.setUrl(QUrl("file://" + self.url))
+
+    def is_image_file(self, f):
+        return Path(f).suffix.lower() in ["jpg", "jpeg", "png", "bmp", "gif", "svg", "webp"]
+
+    def get_same_dir_images(self):
+        files = [f for f in os.listdir(self.parent_dir) if os.path.isfile(os.path.join(self.parent_dir, f))]
+        return list(filter(self.is_image_file, files))
+
+    def load_next_image(self):
+        images = self.get_same_dir_images()
+        if self.image_name in images:
+            image_index = images.index(self.image_name)
+            if image_index == len(images) - 1:
+                image_index = 0
+            else:
+                image_index += 1
+
+            self.load_image(os.path.join(self.parent_dir, images[image_index]))
+
+    def load_prev_image(self):
+        images = self.get_same_dir_images()
+        if self.image_name in images:
+            image_index = images.index(self.image_name)
+            if image_index == 0:
+                image_index = len(images) - 1
+            else:
+                image_index -= 1
+
+            self.load_image(os.path.join(self.parent_dir, images[image_index]))