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# Copyright (C) 2006-2007 Red Hat, Inc.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
import os
import re
import time
import logging
import gobject
import gtk
import hippo
import rsvg
import cairo
from sugar.graphics.style import Color
from sugar.graphics.xocolor import XoColor
from sugar.graphics import style
from sugar.graphics.palette import Palette, CanvasInvoker
_svg_loader = None
def _get_svg_loader():
global _svg_loader
if _svg_loader == None:
_svg_loader = _SVGLoader()
return _svg_loader
class _SVGLoader(object):
def load(self, file_name, entities):
icon_file = open(file_name, 'r')
data = icon_file.read()
icon_file.close()
for entity, value in entities.items():
xml = '<!ENTITY %s "%s">' % (entity, value)
data = re.sub('<!ENTITY %s .*>' % entity, xml, data)
return rsvg.Handle(data=data)
class _IconBuffer(gobject.GObject):
def __init__(self):
gobject.GObject.__init__(self)
self._svg_loader = _get_svg_loader()
self._surface = None
self.icon_name = None
self.file_name = None
self.fill_color = None
self.stroke_color = None
self.width = None
self.height = None
def _load_svg(self, file_name):
entities = {}
if self.fill_color:
entities['fill_color'] = self.fill_color
if self.stroke_color:
entities['stroke_color'] = self.stroke_color
return self._svg_loader.load(file_name, entities)
def _load_pixbuf(self, file_name):
if self.width is None or self.height is None:
pixbuf = gtk.gdk.pixbuf_new_from_file(file_name)
else:
pixbuf = gtk.gdk.pixbuf_new_from_file_at_size(
file_name, self.width, self.height)
return hippo.cairo_surface_from_gdk_pixbuf(pixbuf)
def _get_file_name(self):
file_name = None
if self.file_name:
return self.file_name
if self.icon_name:
theme = gtk.icon_theme_get_default()
size = 0
if self.width != None:
size = self.width
info = theme.lookup_icon(self.icon_name, size, 0)
if info:
return info.get_filename()
return None
def get_surface(self):
if self._surface is not None:
return self._surface
file_name = self._get_file_name()
if file_name is None:
return None
if file_name.endswith('.svg'):
handle = self._load_svg(file_name)
dimensions = handle.get_dimension_data()
icon_width = int(dimensions[0])
icon_height = int(dimensions[1])
if self.width is not None and self.height is not None:
target_width = self.width
target_height = self.height
else:
target_width = icon_width
target_height = icon_height
self._surface = cairo.ImageSurface(cairo.FORMAT_ARGB32,
target_width, target_height)
context = cairo.Context(self._surface)
context.scale(float(target_width) / float(icon_width),
float(target_height) / float(icon_height))
handle.render_cairo(context)
else:
self._surface = self._load_pixbuf(file_name)
return self._surface
def invalidate(self):
self._surface = None
class Icon(gtk.Image):
__gtype_name__ = 'SugarIcon'
__gproperties__ = {
'xo-color' : (object, None, None,
gobject.PARAM_WRITABLE),
'fill-color' : (object, None, None,
gobject.PARAM_READWRITE),
'stroke-color' : (object, None, None,
gobject.PARAM_READWRITE)
}
def __init__(self, **kwargs):
self._buffer = _IconBuffer()
gobject.GObject.__init__(self, **kwargs)
def _sync_image_properties(self):
if self._buffer.icon_name != self.props.icon_name:
self._buffer.icon_name = self.props.icon_name
self._buffer.invalidate()
if self._buffer.file_name != self.props.file:
self._buffer.file_name = self.props.file
self._buffer.invalidate()
width, height = gtk.icon_size_lookup(self.props.icon_size)
if self._buffer.width != width and self._buffer.height != height:
self._buffer.width = width
self._buffer.height = height
self._buffer.invalidate()
def _icon_size_changed_cb(self, image, pspec):
self._buffer.icon_size = self.props.icon_size
self._buffer.invalidate()
def _icon_name_changed_cb(self, image, pspec):
self._buffer.icon_name = self.props.icon_name
self._buffer.invalidate()
def _file_changed_cb(self, image, pspec):
self._buffer.file_name = self.props.file
self._buffer.invalidate()
def _update_buffer_size(self):
width, height = gtk.icon_size_lookup(self.props.icon_size)
self._buffer.width = width
self._buffer.height = height
self._buffer.invalidate()
def do_expose_event(self, event):
self._sync_image_properties()
surface = self._buffer.get_surface()
if surface is not None:
cr = self.window.cairo_create()
x = self.allocation.x
y = self.allocation.y
cr.set_source_surface(surface, x, y)
cr.paint()
def do_set_property(self, pspec, value):
if pspec.name == 'xo-color':
self.props.fill_color = value.get_fill_color()
self.props.stroke_color = value.get_stroke_color()
elif pspec.name == 'fill-color':
self._buffer.fill_color = value
self._buffer.invalidate()
elif pspec.name == 'stroke-color':
self._buffer.fill_color = value
self._buffer.invalidate()
else:
gtk.Image.do_set_property(self, pspec, value)
def do_get_property(self, pspec):
if pspec.name == 'fill-color':
return self._buffer.fill_color
elif pspec.name == 'stroke-color':
return self._buffer.stroke_color
else:
return gtk.Image.do_get_property(self, pspec)
_ICON_REQUEST_SIZE = 50
_BADGE_SIZE = 0.45
class _IconCacheIcon:
def __init__(self, name, fill_color, stroke_color, now):
self.last_used = now
self.usage_count = 1
self.badge_x = 1.0 - _BADGE_SIZE / 2
self.badge_y = 1.0 - _BADGE_SIZE / 2
if name[0:6] == "theme:":
info = gtk.icon_theme_get_default().lookup_icon(
name[6:], _ICON_REQUEST_SIZE, 0)
if not info:
raise ValueError("Icon '" + name + "' not found.")
fname = info.get_filename()
attach_points = info.get_attach_points()
if attach_points is not None:
self.badge_x = float(attach_points[0][0]) / _ICON_REQUEST_SIZE
self.badge_y = float(attach_points[0][1]) / _ICON_REQUEST_SIZE
del info
else:
fname = name
self.handle = self._read_icon_data(fname, fill_color, stroke_color)
def _read_icon_data(self, filename, fill_color, stroke_color):
icon_file = open(filename, 'r')
data = icon_file.read()
icon_file.close()
if fill_color:
entity = '<!ENTITY fill_color "%s">' % fill_color
data = re.sub('<!ENTITY fill_color .*>', entity, data)
if stroke_color:
entity = '<!ENTITY stroke_color "%s">' % stroke_color
data = re.sub('<!ENTITY stroke_color .*>', entity, data)
self.data_size = len(data)
return rsvg.Handle(data=data)
class _IconCache:
_CACHE_MAX = 50000 # in bytes
def __init__(self):
self._icons = {}
self._cache_size = 0
def _cache_cleanup(self, key, now):
while self._cache_size > self._CACHE_MAX:
evict_key = None
oldest_key = None
oldest_time = now
for icon_key, icon in self._icons.items():
# Don't evict the icon we are about to use if it's in the cache
if icon_key == key:
continue
# evict large icons first
if icon.data_size > self._CACHE_MAX:
evict_key = icon_key
break
# evict older icons next; those used over 2 minutes ago
if icon.last_used < now - 120:
evict_key = icon_key
break
# otherwise, evict the oldest
if oldest_time > icon.last_used:
oldest_time = icon.last_used
oldest_key = icon_key
# If there's nothing specific to evict, try evicting
# the oldest thing
if not evict_key:
if not oldest_key:
break
evict_key = oldest_key
self._cache_size -= self._icons[evict_key].data_size
del self._icons[evict_key]
def get_icon(self, name, fill_color, stroke_color):
if not name:
return None
if fill_color or stroke_color:
key = (name, fill_color, stroke_color)
else:
key = name
# If we're over the cache limit, evict something from the cache
now = time.time()
self._cache_cleanup(key, now)
if self._icons.has_key(key):
icon = self._icons[key]
icon.usage_count += 1
icon.last_used = now
else:
icon = _IconCacheIcon(name, fill_color, stroke_color, now)
self._icons[key] = icon
self._cache_size += icon.data_size
return icon
class CanvasIcon(hippo.CanvasBox, hippo.CanvasItem):
__gtype_name__ = 'CanvasIcon'
__gproperties__ = {
'icon-name' : (str, None, None, None,
gobject.PARAM_READWRITE),
'xo-color' : (object, None, None,
gobject.PARAM_WRITABLE),
'fill-color' : (object, None, None,
gobject.PARAM_READWRITE),
'stroke-color' : (object, None, None,
gobject.PARAM_READWRITE),
'size' : (int, None, None, 0, 1024, 0,
gobject.PARAM_READWRITE),
'scale' : (int, None, None, 0, 1024, 0,
gobject.PARAM_READWRITE),
'cache' : (bool, None, None, False,
gobject.PARAM_READWRITE),
'active' : (bool, None, None, True,
gobject.PARAM_READWRITE),
'badge-name' : (str, None, None, None,
gobject.PARAM_READWRITE)
}
_cache = _IconCache()
def __init__(self, **kwargs):
self._buffers = {}
self._cur_buffer = None
self._size = 0
self._scale = 0
self._fill_color = None
self._stroke_color = None
self._icon_name = None
self._cache = False
self._icon = None
self._active = True
self._palette = None
self._badge_name = None
self._badge_icon = None
hippo.CanvasBox.__init__(self, **kwargs)
self.connect_after('motion-notify-event', self._motion_notify_event_cb)
def _clear_buffers(self):
icon_key = self._get_current_buffer_key(self._icon_name)
badge_key = None
if self._badge_name:
badge_key = self._get_current_buffer_key(self._badge_name)
for key in self._buffers.keys():
if key != icon_key:
if not badge_key or (key != badge_key):
del self._buffers[key]
self._buffers = {}
def do_set_property(self, pspec, value):
if pspec.name == 'icon-name':
if self._icon_name != value and not self._cache:
self._clear_buffers()
self._icon_name = value
self._icon = None
self.emit_paint_needed(0, 0, -1, -1)
elif pspec.name == 'xo-color':
self.props.fill_color = style.Color(value.get_fill_color())
self.props.stroke_color = style.Color(value.get_stroke_color())
elif pspec.name == 'fill-color':
if self._fill_color != value:
if not self._cache:
self._clear_buffers()
self._fill_color = value
self._icon = None
self._badge_icon = None
self.emit_paint_needed(0, 0, -1, -1)
elif pspec.name == 'stroke-color':
if self._stroke_color != value:
if not self._cache:
self._clear_buffers()
self._stroke_color = value
self._icon = None
self._badge_icon = None
self.emit_paint_needed(0, 0, -1, -1)
elif pspec.name == 'size':
if self._size != value and not self._cache:
self._clear_buffers()
self._size = value
self.emit_request_changed()
elif pspec.name == 'scale':
if self._scale != value and not self._cache:
self._clear_buffers()
self._scale = value
self.emit_request_changed()
elif pspec.name == 'cache':
self._cache = value
elif pspec.name == 'active':
if self._active != value:
if not self._cache:
self._clear_buffers()
self._active = value
self._icon = None
self.emit_paint_needed(0, 0, -1, -1)
elif pspec.name == 'badge-name':
if self._badge_name != value and not self._cache:
self._clear_buffers()
self._badge_name = value
self._badge_icon = None
self.emit_paint_needed(0, 0, -1, -1)
def _choose_colors(self):
fill_color = None
stroke_color = None
if self._active:
if self._fill_color:
fill_color = self._fill_color.get_svg()
if self._stroke_color:
stroke_color = self._stroke_color.get_svg()
else:
stroke_color = color.ICON_STROKE_INACTIVE.get_svg()
if self._fill_color:
fill_color = self._fill_color.get_svg()
return [fill_color, stroke_color]
def _get_icon_from_cache(self, name, icon):
if not icon:
cache = CanvasIcon._cache
[fill_color, stroke_color] = self._choose_colors()
icon = cache.get_icon(name, fill_color, stroke_color)
return icon
def _get_icon(self):
self._icon = self._get_icon_from_cache(self._icon_name, self._icon)
return self._icon
def _get_badge_icon(self):
self._badge_icon = self._get_icon_from_cache(self._badge_name,
self._badge_icon)
return self._badge_icon
def _get_current_buffer_key(self, name):
[fill_color, stroke_color] = self._choose_colors()
return (name, fill_color, stroke_color, self._size)
def do_get_property(self, pspec):
if pspec.name == 'size':
return self._size
elif pspec.name == 'icon-name':
return self._icon_name
elif pspec.name == 'fill-color':
return self._fill_color
elif pspec.name == 'stroke-color':
return self._stroke_color
elif pspec.name == 'cache':
return self._cache
elif pspec.name == 'active':
return self._active
elif pspec.name == 'badge-name':
return self._badge_name
elif pspec.name == 'scale':
return self._scale
def _get_icon_size(self, icon):
if icon:
dimensions = icon.handle.get_dimension_data()
return int(dimensions[0]), int(dimensions[1])
else:
return [0, 0]
def _get_size(self, icon):
width, height = self._get_icon_size(icon)
if self._scale != 0:
width = int(width * self._scale)
height = int(height * self._scale)
elif self._size != 0:
width = height = self._size
return [width, height]
def _get_buffer(self, cr, name, icon, scale_factor=None):
"""Return a cached cairo surface for the SVG icon, or if none exists,
create a new cairo surface with the right size."""
buf = None
key = self._get_current_buffer_key(name)
if self._buffers.has_key(key):
buf = self._buffers[key]
else:
[icon_w, icon_h] = self._get_icon_size(icon)
[target_w, target_h] = self._get_size(icon)
if scale_factor:
target_w = int(target_w * scale_factor)
target_h = int(target_h * scale_factor)
target = cr.get_target()
buf = target.create_similar(cairo.CONTENT_COLOR_ALPHA,
target_w, target_h)
ctx = cairo.Context(buf)
ctx.scale(float(target_w) / float(icon_w),
float(target_h) / float(icon_h))
icon.handle.render_cairo(ctx)
del ctx
self._buffers[key] = buf
return buf
def do_paint_below_children(self, cr, damaged_box):
icon = self._get_icon()
if icon is None:
return
icon_buf = self._get_buffer(cr, self._icon_name, icon)
[width, height] = self.get_allocation()
icon_x = (width - icon_buf.get_width()) / 2
icon_y = (height - icon_buf.get_height()) / 2
cr.set_source_surface(icon_buf, icon_x, icon_y)
cr.paint()
if self._badge_name:
badge_icon = self._get_badge_icon()
if badge_icon:
badge_buf = self._get_buffer(cr, self._badge_name, badge_icon, _BADGE_SIZE)
badge_x = (icon_x + icon.badge_x * icon_buf.get_width() -
badge_buf.get_width() / 2)
badge_y = (icon_y + icon.badge_y * icon_buf.get_height() -
badge_buf.get_height() / 2)
cr.set_source_surface(badge_buf, badge_x, badge_y)
cr.paint()
def do_get_content_width_request(self):
icon = self._get_icon()
[width, height] = self._get_size(icon)
if self._badge_name is not None:
# If the badge goes outside the bounding box, add space
# on *both* sides (to keep the main icon centered)
if icon.badge_x < 0.0:
width = int(width * 2 * (1.0 - icon.badge_x))
elif icon.badge_x + _BADGE_SIZE > 1.0:
width = int(width * 2 * (icon.badge_x + _BADGE_SIZE - 1.0))
return (width, width)
def do_get_content_height_request(self, for_width):
icon = self._get_icon()
[width, height] = self._get_size(icon)
if self._badge_name is not None:
if icon.badge_y < 0.0:
height = int(height * 2 * (1.0 - icon.badge_y))
elif icon.badge_y + _BADGE_SIZE > 1.0:
height = int(height * 2 * (icon.badge_y + _BADGE_SIZE - 1.0))
return (height, height)
def do_button_press_event(self, event):
self.emit_activated()
return True
def _motion_notify_event_cb(self, button, event):
if event.detail == hippo.MOTION_DETAIL_ENTER:
self.prelight(True)
elif event.detail == hippo.MOTION_DETAIL_LEAVE:
self.prelight(False)
return False
def prelight(self, enter):
"""
Override this method for adding prelighting behavior.
"""
pass
def get_palette(self):
return self._palette
def set_palette(self, palette):
self._palette = palette
if not self._palette.props.invoker:
self._palette.props.invoker = CanvasInvoker(self)
def set_tooltip(self, text):
self.set_palette(Palette(text))
palette = property(get_palette, set_palette)
def get_icon_state(base_name, perc):
step = 5
strength = round(perc / step) * step
icon_theme = gtk.icon_theme_get_default()
while strength <= 100:
icon_name = '%s-%03d' % (base_name, strength)
if icon_theme.has_icon(icon_name):
return 'theme:' + icon_name
strength = strength + step
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