Some new files I forgot in the previous commit

1 files changed, 374 insertions, 0 deletions

diff --git a/sugar/chat/richtext.py b/sugar/chat/richtext.py
new file mode 100644
index 0000000..0ac70b1
--- /dev/null
+++ b/sugar/chat/richtext.py
@@ -0,0 +1,374 @@
+#!/usr/bin/env python
+
+import pygtk
+import gobject
+pygtk.require('2.0')
+import gtk
+import pango
+import xml.sax
+
+class RichTextView(gtk.TextView):
+	
+	__gsignals__ = {
+		'link-clicked': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
+					    ([gobject.TYPE_STRING]))
+	}
+
+	def __init__(self):
+		gtk.TextView.__init__(self, RichTextBuffer())
+		self.connect("motion-notify-event", self.__motion_notify_cb)
+		self.connect("button-press-event", self.__button_press_cb)
+		self.__hover_link = False
+
+	def _set_hover_link(self, hover_link):
+		if hover_link != self.__hover_link:
+			self.__hover_link = hover_link
+			display = self.get_toplevel().get_display()
+			child_window = self.get_window(gtk.TEXT_WINDOW_TEXT)
+			
+			if hover_link:
+				cursor = gtk.gdk.Cursor(display, gtk.gdk.HAND2)
+			else:
+				cursor = gtk.gdk.Cursor(display, gtk.gdk.XTERM)
+				
+			child_window.set_cursor(cursor)
+			gtk.gdk.flush()
+	
+	def __iter_is_link(self, it):
+		item = self.get_buffer().get_tag_table().lookup("link")
+		if item:
+			return it.has_tag(item)
+		return False
+
+	def __get_event_iter(self, event):
+		return self.get_iter_at_location(int(event.x), int(event.y))
+
+	def __motion_notify_cb(self, widget, event):
+		if event.is_hint:
+			[x, y, state] = event.window.get_pointer();
+		
+		it = self.__get_event_iter(event)
+		if it:
+			hover_link = self.__iter_is_link(it)
+		else:
+			hover_link = False
+
+		self._set_hover_link(hover_link)
+		
+	def __button_press_cb(self, widget, event):
+		it = self.__get_event_iter(event)
+		if it and self.__iter_is_link(it):
+			buf = self.get_buffer()
+			address_tag = buf.get_tag_table().lookup("link-address")
+
+			address_end = it.copy()
+			address_end.backward_to_tag_toggle(address_tag)
+			
+			address_start = address_end.copy()
+			address_start.backward_to_tag_toggle(address_tag)
+			
+			address = buf.get_text(address_start, address_end)
+			self.emit("link-clicked", address)
+
+class RichTextBuffer(gtk.TextBuffer):
+	def __init__(self):
+		gtk.TextBuffer.__init__(self)
+
+		self.connect_after("insert-text", self.__insert_text_cb)
+		
+		self.__create_tags()
+		self.active_tags = []
+
+	def append_link(self, title, address):
+		it = self.get_iter_at_mark(self.get_insert())
+		self.insert_with_tags_by_name(it, address, "link", "link-address")
+		self.insert_with_tags_by_name(it, title, "link")
+		
+	def apply_tag(self, tag_name):
+		self.active_tags.append(tag_name)
+		
+		bounds = self.get_selection_bounds()
+		if bounds:
+			[start, end] = bounds
+			self.apply_tag_by_name(tag_name, start, end)
+
+	def unapply_tag(self, tag_name):
+		self.active_tags.remove(tag_name)
+
+		bounds = self.get_selection_bounds()
+		if bounds:
+			[start, end] = bounds
+			self.remove_tag_by_name(tag_name, start, end)
+	
+	def __create_tags(self):
+		tag = self.create_tag("link")
+		tag.set_property("underline", pango.UNDERLINE_SINGLE)
+		tag.set_property("foreground", "#0000FF")
+
+		tag = self.create_tag("link-address")
+		tag.set_property("invisible", True)
+
+		tag = self.create_tag("bold")
+		tag.set_property("weight", pango.WEIGHT_BOLD)
+		
+		tag = self.create_tag("italic")
+		tag.set_property("style", pango.STYLE_ITALIC)
+
+		tag = self.create_tag("font-size-xx-small")
+		tag.set_property("scale", pango.SCALE_XX_SMALL)
+
+		tag = self.create_tag("font-size-x-small")
+		tag.set_property("scale", pango.SCALE_X_SMALL)
+
+		tag = self.create_tag("font-size-small")
+		tag.set_property("scale", pango.SCALE_SMALL)
+
+		tag = self.create_tag("font-size-large")
+		tag.set_property("scale", pango.SCALE_LARGE)
+
+		tag = self.create_tag("font-size-x-large")
+		tag.set_property("scale", pango.SCALE_X_LARGE)
+
+		tag = self.create_tag("font-size-xx-large")
+		tag.set_property("scale", pango.SCALE_XX_LARGE)
+	
+	def __insert_text_cb(self, widget, pos, text, length):
+		for tag in self.active_tags:
+				pos_end = pos.copy()
+				pos_end.backward_chars(length)
+				self.apply_tag_by_name(tag, pos, pos_end)
+		
+class RichTextToolbar(gtk.Toolbar):
+	def __init__(self, buf):
+		gtk.Toolbar.__init__(self)
+		
+		self.buf = buf
+		
+		self.set_style(gtk.TOOLBAR_ICONS)
+		
+		self._font_size = "normal"
+		self._font_scales = [ "xx-small", "x-small", "small",	\
+							  "normal",							\
+							  "large", "x-large", "xx-large" ]
+		
+		item = gtk.ToggleToolButton(gtk.STOCK_BOLD)
+		item.connect("toggled", self.__toggle_style_cb, "bold")
+		self.insert(item, -1)
+		item.show()
+
+		item = gtk.ToggleToolButton(gtk.STOCK_ITALIC)
+		item.connect("toggled", self.__toggle_style_cb, "italic")
+		self.insert(item, -1)
+		item.show()
+
+		self._font_size_up = gtk.ToolButton(gtk.STOCK_GO_UP)
+		self._font_size_up.connect("clicked", self.__font_size_up_cb)
+		self.insert(self._font_size_up, -1)
+		self._font_size_up.show()
+
+		self._font_size_down = gtk.ToolButton(gtk.STOCK_GO_DOWN)
+		self._font_size_down.connect("clicked", self.__font_size_down_cb)
+		self.insert(self._font_size_down, -1)
+		self._font_size_down.show()
+	
+	def _get_font_size_index(self):
+		return self._font_scales.index(self._font_size);
+	
+	def __toggle_style_cb(self, toggle, tag_name):
+		if toggle.get_active():
+			self.buf.apply_tag(tag_name)
+		else:
+			self.buf.unapply_tag(tag_name)
+
+	def _set_font_size(self, font_size):
+		if self._font_size != "normal":
+			self.buf.unapply_tag("font-size-" + self._font_size)
+		if font_size != "normal":
+			self.buf.apply_tag("font-size-" + font_size)
+			
+		self._font_size = font_size
+		
+		can_up = self._get_font_size_index() < len(self._font_scales) - 1
+		can_down = self._get_font_size_index() > 0
+		self._font_size_up.set_sensitive(can_up)
+		self._font_size_down.set_sensitive(can_down)
+
+	def __font_size_up_cb(self, button): 
+		index = self._get_font_size_index()
+		if index + 1 < len(self._font_scales):
+			self._set_font_size(self._font_scales[index + 1])
+
+	def __font_size_down_cb(self, button):
+		index = self._get_font_size_index()
+		if index > 0:
+			self._set_font_size(self._font_scales[index - 1])
+			
+class RichTextHandler(xml.sax.handler.ContentHandler):
+	def __init__(self, serializer, buf):
+		self.buf = buf
+		self.serializer = serializer
+		self.tags = []
+
+	def startElement(self, name, attrs):
+		if name != "richtext":
+			tag = self.serializer.deserialize_element(name, attrs)
+			self.tags.append(tag)
+		if name == "link":
+			self.href = attrs['href']
+ 
+	def characters(self, data):
+		start_it = it = self.buf.get_end_iter()
+		mark = self.buf.create_mark(None, start_it, True)
+		self.buf.insert(it, data)
+		start_it = self.buf.get_iter_at_mark(mark)
+
+		for tag in self.tags:
+			self.buf.apply_tag_by_name(tag, start_it, it)
+			if tag == "link":
+				self.buf.insert_with_tags_by_name(start_it, self.href,
+											      "link", "link-address")
+ 
+	def endElement(self, name):
+		if name != "richtext":
+			self.tags.pop()
+
+class RichTextSerializer:
+	def __init__(self):
+		self._open_tags = []
+
+	def deserialize_element(self, el_name, attributes):
+		if el_name == "bold":
+			return "bold"
+		elif el_name == "italic":
+			return "italic"
+		elif el_name == "font":
+			return "font-size-" + attributes["size"]
+		elif el_name == "link":
+			return "link"
+		else:
+			return None
+
+	def serialize_tag_start(self, tag, it):
+		name = tag.get_property("name")
+		if name == "bold":
+			return "<bold>"
+		elif name == "italic":
+			return "<italic>"
+		elif name == "link":
+			address_tag = self.buf.get_tag_table().lookup("link-address")
+			end = it.copy()
+			end.forward_to_tag_toggle(address_tag)
+			address = self.buf.get_text(it, end)
+			return "<link " + "href=\"" + address + "\">"
+		elif name == "link-address":
+			return ""
+		elif name.startswith("font-size-"):
+			tag_name = name.replace("font-size-", "", 1)
+			return "<font size=\"" + tag_name + "\">"
+		else:
+			return "<unknown>"
+
+	def serialize_tag_end(self, tag):
+		name = tag.get_property("name")
+		if name == "bold":
+			return "</bold>"
+		elif name == "italic":
+			return "</italic>"
+		elif name == "link":
+			return "</link>"
+		elif name == "link-address":
+			return ""
+		elif name.startswith("font-size-"):
+			return "</font>"
+		else:
+			return "</unknown>"
+	
+	def serialize(self, buf):
+		self.buf = buf
+		
+		xml = "<richtext>"
+
+		next_it = buf.get_start_iter()
+		while not next_it.is_end():
+			it = next_it.copy()
+			if not next_it.forward_to_tag_toggle(None):
+				next_it = buf.get_end_iter()
+
+			tags_to_reopen = []
+
+			for tag in it.get_toggled_tags(False):
+				while 1:
+					open_tag = self._open_tags.pop()
+					xml += self.serialize_tag_end(tag)
+					if open_tag == tag:
+						break						
+					tags_to_reopen.append(open_tag)
+					
+			for tag in tags_to_reopen:
+				self._open_tags.append(tag)
+				xml += self.serialize_tag_start(tag, it)
+			
+			for tag in it.get_toggled_tags(True):
+				self._open_tags.append(tag)
+				xml += self.serialize_tag_start(tag, it)
+			
+			xml += buf.get_text(it, next_it, False)
+
+		if next_it.is_end():
+			self._open_tags.reverse()
+			for tag in self._open_tags:
+				xml += self.serialize_tag_end(tag)
+		
+		xml += "</richtext>"
+		
+		return xml
+
+	def deserialize(self, xml_string, buf):
+		parser = xml.sax.make_parser()
+		handler = RichTextHandler(self, buf)
+		parser.setContentHandler(handler)
+		parser.feed(xml_string)
+		parser.close()
+
+def test_quit(window, rich_buf):
+	print RichTextSerializer().serialize(rich_buf)
+	gtk.main_quit()
+	
+def link_clicked(view, address):
+	print "Link clicked " + address
+
+if __name__ == "__main__":
+	window = gtk.Window()
+	window.set_default_size(400, 300)
+	
+	vbox = gtk.VBox()
+	
+	view = RichTextView()
+	view.connect("link-clicked", link_clicked)
+	vbox.pack_start(view)
+	view.show()
+
+	rich_buf = view.get_buffer()
+	
+	xml_string = "<richtext>"	
+
+	xml_string += "<bold><italic>Test</italic>one</bold>\n"
+	xml_string += "<bold><italic>Test two</italic></bold>"
+	xml_string += "<font size=\"xx-small\">Test three</font>"
+	xml_string += "<link href=\"http://www.gnome.org\">Test link</link>"
+	xml_string += "</richtext>"
+
+	RichTextSerializer().deserialize(xml_string, rich_buf)
+	
+	toolbar = RichTextToolbar(rich_buf)
+	vbox.pack_start(toolbar, False)
+	toolbar.show()
+	
+	window.add(vbox)
+	vbox.show()
+	
+	window.show()
+	
+	window.connect("destroy", test_quit, rich_buf)
+
+	gtk.main()