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