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import os
import logging
import gtk
import pango
import gobject
from sugar.graphics import style
PAGE_SIZE = 38
class TextViewer(gobject.GObject):
__gsignals__ = {
'zoom-changed': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
([int])),
'page-changed': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
([int, int])),
'selection-changed': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
([])),
}
def setup(self, activity):
activity._scrolled = gtk.ScrolledWindow()
activity._scrolled.set_policy(gtk.POLICY_NEVER, gtk.POLICY_AUTOMATIC)
activity._scrolled.props.shadow_type = gtk.SHADOW_NONE
self._scrolled = activity._scrolled
self.textview = gtk.TextView()
self.textview.set_editable(False)
self.textview.set_cursor_visible(False)
self.textview.set_left_margin(50)
self.textview.set_right_margin(50)
self.textview.set_wrap_mode(gtk.WRAP_WORD)
activity._scrolled.add(self.textview)
self.textview.show()
activity._scrolled.show()
activity._hbox.pack_start(activity._scrolled, expand=True, fill=True)
self._font_size = style.zoom(10)
self.font_desc = pango.FontDescription("sans %d" % self._font_size)
self.textview.modify_font(self.font_desc)
self._zoom = 100
self.font_zoom_relation = self._zoom / self._font_size
self._current_page = 0
def load_document(self, file_path):
self._etext_file = open(file_path.replace('file://', ''), 'r')
self.page_index = [0]
pagecount = 0
linecount = 0
while self._etext_file:
line = self._etext_file.readline()
if not line:
break
line_increment = (len(line) / 80) + 1
linecount = linecount + line_increment
if linecount >= PAGE_SIZE:
position = self._etext_file.tell()
self.page_index.append(position)
linecount = 0
pagecount = pagecount + 1
self._pagecount = pagecount + 1
self.set_current_page(0)
def _show_page(self, page_number):
position = self.page_index[page_number]
self._etext_file.seek(position)
linecount = 0
label_text = '\n\n\n'
while linecount < PAGE_SIZE:
line = self._etext_file.readline()
if not line:
break
else:
label_text = label_text + unicode(line, "iso-8859-1")
line_increment = (len(line) / 80) + 1
linecount = linecount + line_increment
textbuffer = self.textview.get_buffer()
label_text = label_text + '\n\n\n'
textbuffer.set_text(label_text)
def connect_page_changed_handler(self, handler):
self.connect('page-changed', handler)
def load_metadata(self, activity):
pass
def set_current_page(self, page):
old_page = self._current_page
self._current_page = page
self._show_page(self._current_page)
self.emit('page-changed', old_page, self._current_page)
def scroll(self, direction, horizontal):
v_adjustment = self._scrolled.get_vadjustment()
if direction == gtk.SCROLL_PAGE_BACKWARD:
if v_adjustment.value == v_adjustment.lower:
self.previous_page()
return
if v_adjustment.value > v_adjustment.lower:
new_value = v_adjustment.value - v_adjustment.step_increment
if new_value < v_adjustment.lower:
new_value = v_adjustment.lower
v_adjustment.value = new_value
else:
if v_adjustment.value == \
v_adjustment.upper - v_adjustment.page_size:
self.next_page()
return
if v_adjustment.value < \
v_adjustment.upper - v_adjustment.page_size:
new_value = v_adjustment.value + v_adjustment.step_increment
if new_value > v_adjustment.upper - v_adjustment.page_size:
new_value = v_adjustment.upper - v_adjustment.page_size
v_adjustment.value = new_value
def previous_page(self):
v_adjustment = self._scrolled.get_vadjustment()
v_adjustment.value = v_adjustment.upper - v_adjustment.page_size
self.set_current_page(self.get_current_page() - 1)
def next_page(self):
v_adjustment = self._scrolled.get_vadjustment()
v_adjustment.value = v_adjustment.lower
self.set_current_page(self.get_current_page() + 1)
def get_current_page(self):
return self._current_page
def get_pagecount(self):
return self._pagecount
def update_toc(self, activity):
pass
def handle_link(self, link):
pass
def get_current_file(self):
pass
def update_metadata(self):
pass
def copy(self):
pass
def update_view_size(self, _scrolled):
pass
def find_set_highlight_search(self, True):
pass
def setup_find_job(self, text, _find_updated_cb):
pass
def find_next(self):
pass
def find_previous(self):
pass
def find_changed(self, job, page):
pass
def get_zoom(self):
return self.font_zoom_relation * self._font_size
def connect_zoom_handler(self, handler):
self._view_notify_zoom_handler = \
self.connect('zoom-changed', handler)
return self._view_notify_zoom_handler
def set_zoom(self, value):
self._zoom = value
self._font_size = int(self._zoom / self.font_zoom_relation)
self.font_desc.set_size(self._font_size * 1024)
self.textview.modify_font(self.font_desc)
def zoom_in(self):
self._set_font_size(self._font_size + 1)
def zoom_out(self):
self._set_font_size(self._font_size - 1)
def _set_font_size(self, size):
self._font_size = size
self.font_desc.set_size(self._font_size * 1024)
self.textview.modify_font(self.font_desc)
self._zoom = self.font_zoom_relation * self._font_size
self.emit('zoom-changed', self._zoom)
def zoom_to_width(self):
pass
def can_zoom_in(self):
return True
def can_zoom_out(self):
return self._font_size > 1
def can_zoom_to_width(self):
return False
def zoom_to_best_fit(self):
return False
def zoom_to_actual_size(self):
return False
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