forked from openlp/openlp
627 lines
28 KiB
Python
627 lines
28 KiB
Python
# -*- coding: utf-8 -*-
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# vim: autoindent shiftwidth=4 expandtab textwidth=120 tabstop=4 softtabstop=4
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###############################################################################
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# OpenLP - Open Source Lyrics Projection #
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# --------------------------------------------------------------------------- #
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# Copyright (c) 2008-2014 Raoul Snyman #
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# Portions copyright (c) 2008-2014 Tim Bentley, Gerald Britton, Jonathan #
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# Corwin, Samuel Findlay, Michael Gorven, Scott Guerrieri, Matthias Hub, #
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# Meinert Jordan, Armin Köhler, Erik Lundin, Edwin Lunando, Brian T. Meyer. #
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# Joshua Miller, Stevan Pettit, Andreas Preikschat, Mattias Põldaru, #
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# Christian Richter, Philip Ridout, Simon Scudder, Jeffrey Smith, #
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# Maikel Stuivenberg, Martin Thompson, Jon Tibble, Dave Warnock, #
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# Frode Woldsund, Martin Zibricky, Patrick Zimmermann #
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# --------------------------------------------------------------------------- #
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# This program is free software; you can redistribute it and/or modify it #
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# under the terms of the GNU General Public License as published by the Free #
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# Software Foundation; version 2 of the License. #
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# #
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# This program is distributed in the hope that it will be useful, but WITHOUT #
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or #
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for #
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# more details. #
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# #
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# You should have received a copy of the GNU General Public License along #
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# with this program; if not, write to the Free Software Foundation, Inc., 59 #
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# Temple Place, Suite 330, Boston, MA 02111-1307 USA #
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###############################################################################
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import logging
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from PyQt4 import QtGui, QtCore, QtWebKit
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from openlp.core.common import Registry, Settings
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from openlp.core.lib import FormattingTags, ImageSource, ItemCapabilities, ScreenList, ServiceItem, expand_tags, \
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build_lyrics_format_css, build_lyrics_outline_css
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from openlp.core.common import ThemeLevel
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from openlp.core.ui import MainDisplay
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log = logging.getLogger(__name__)
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VERSE = 'The Lord said to {r}Noah{/r}: \n' \
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'There\'s gonna be a {su}floody{/su}, {sb}floody{/sb}\n' \
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'The Lord said to {g}Noah{/g}:\n' \
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'There\'s gonna be a {st}floody{/st}, {it}floody{/it}\n' \
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'Get those children out of the muddy, muddy \n' \
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'{r}C{/r}{b}h{/b}{bl}i{/bl}{y}l{/y}{g}d{/g}{pk}' \
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'r{/pk}{o}e{/o}{pp}n{/pp} of the Lord\n'
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VERSE_FOR_LINE_COUNT = '\n'.join(map(str, range(100)))
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FOOTER = ['Arky Arky (Unknown)', 'Public Domain', 'CCLI 123456']
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class Renderer(object):
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"""
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Class to pull all Renderer interactions into one place. The plugins will call helper methods to do the rendering but
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this class will provide display defense code.
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"""
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log.info('Renderer Loaded')
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def __init__(self):
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"""
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Initialise the renderer.
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"""
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log.debug('Initialisation started')
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self.screens = ScreenList()
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Registry().register('renderer', self)
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self.theme_level = ThemeLevel.Global
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self.global_theme_name = ''
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self.service_theme_name = ''
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self.item_theme_name = ''
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self.force_page = False
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self.display = MainDisplay(None, False, self)
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self.display.setup()
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self._theme_dimensions = {}
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self._calculate_default()
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Registry().register_function('theme_update_global', self.set_global_theme)
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self.web = QtWebKit.QWebView()
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self.web.setVisible(False)
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self.web_frame = self.web.page().mainFrame()
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def update_display(self):
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"""
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Updates the renderer's information about the current screen.
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"""
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log.debug('Update Display')
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self._calculate_default()
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if self.display:
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self.display.close()
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self.display = MainDisplay(None, False, self)
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self.display.setup()
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self._theme_dimensions = {}
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def update_theme(self, theme_name, old_theme_name=None, only_delete=False):
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"""
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This method updates the theme in ``_theme_dimensions`` when a theme has been edited or renamed.
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``theme_name``
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The current theme name.
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``old_theme_name``
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The old theme name. Has only to be passed, when the theme has been renamed. Defaults to *None*.
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``only_delete``
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Only remove the given ``theme_name`` from the ``_theme_dimensions`` list. This can be used when a theme is
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permanently deleted.
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"""
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if old_theme_name is not None and old_theme_name in self._theme_dimensions:
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del self._theme_dimensions[old_theme_name]
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if theme_name in self._theme_dimensions:
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del self._theme_dimensions[theme_name]
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if not only_delete and theme_name:
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self._set_theme(theme_name)
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def _set_theme(self, theme_name):
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"""
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Helper method to save theme names and theme data.
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``theme_name``
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The theme name.
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"""
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if theme_name not in self._theme_dimensions:
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theme_data = self.theme_manager.get_theme_data(theme_name)
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main_rect = self.get_main_rectangle(theme_data)
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footer_rect = self.get_footer_rectangle(theme_data)
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self._theme_dimensions[theme_name] = [theme_data, main_rect, footer_rect]
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else:
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theme_data, main_rect, footer_rect = self._theme_dimensions[theme_name]
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# if No file do not update cache
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if theme_data.background_filename:
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self.image_manager.add_image(theme_data.background_filename,
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ImageSource.Theme, QtGui.QColor(theme_data.background_border_color))
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def pre_render(self, override_theme_data=None):
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"""
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Set up the theme to be used before rendering an item.
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``override_theme_data``
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The theme data should be passed, when we want to use our own theme data, regardless of the theme level. This
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should for example be used in the theme manager. **Note**, this is **not** to be mixed up with the
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``set_item_theme`` method.
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"""
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# Just assume we use the global theme.
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theme_to_use = self.global_theme_name
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# The theme level is either set to Service or Item. Use the service theme if one is set. We also have to use the
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# service theme, even when the theme level is set to Item, because the item does not necessarily have to have a
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# theme.
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if self.theme_level != ThemeLevel.Global:
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# When the theme level is at Service and we actually have a service theme then use it.
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if self.service_theme_name:
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theme_to_use = self.service_theme_name
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# If we have Item level and have an item theme then use it.
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if self.theme_level == ThemeLevel.Song and self.item_theme_name:
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theme_to_use = self.item_theme_name
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if override_theme_data is None:
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if theme_to_use not in self._theme_dimensions:
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self._set_theme(theme_to_use)
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theme_data, main_rect, footer_rect = self._theme_dimensions[theme_to_use]
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else:
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# Ignore everything and use own theme data.
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theme_data = override_theme_data
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main_rect = self.get_main_rectangle(override_theme_data)
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footer_rect = self.get_footer_rectangle(override_theme_data)
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self._set_text_rectangle(theme_data, main_rect, footer_rect)
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return theme_data, self._rect, self._rect_footer
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def set_theme_level(self, theme_level):
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"""
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Sets the theme level.
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``theme_level``
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The theme level to be used.
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"""
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self.theme_level = theme_level
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def set_global_theme(self):
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"""
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Set the global-level theme name.
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``global_theme_name``
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The global-level theme's name.
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"""
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global_theme_name = Settings().value('themes/global theme')
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self._set_theme(global_theme_name)
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self.global_theme_name = global_theme_name
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def set_service_theme(self, service_theme_name):
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"""
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Set the service-level theme.
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``service_theme_name``
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The service level theme's name.
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"""
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self._set_theme(service_theme_name)
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self.service_theme_name = service_theme_name
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def set_item_theme(self, item_theme_name):
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"""
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Set the item-level theme. **Note**, this has to be done for each item we are rendering.
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``item_theme_name``
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The item theme's name.
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"""
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self._set_theme(item_theme_name)
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self.item_theme_name = item_theme_name
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def generate_preview(self, theme_data, force_page=False):
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"""
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Generate a preview of a theme.
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``theme_data``
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The theme to generated a preview for.
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``force_page``
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Flag to tell message lines per page need to be generated.
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"""
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log.debug('generate preview')
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# save value for use in format_slide
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self.force_page = force_page
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# build a service item to generate preview
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service_item = ServiceItem()
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if self.force_page:
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# make big page for theme edit dialog to get line count
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service_item.add_from_text(VERSE_FOR_LINE_COUNT)
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else:
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service_item.add_from_text(VERSE)
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service_item.raw_footer = FOOTER
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# if No file do not update cache
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if theme_data.background_filename:
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self.image_manager.add_image(
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theme_data.background_filename, ImageSource.Theme, QtGui.QColor(theme_data.background_border_color))
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theme_data, main, footer = self.pre_render(theme_data)
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service_item.theme_data = theme_data
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service_item.main = main
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service_item.footer = footer
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service_item.render(True)
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if not self.force_page:
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self.display.build_html(service_item)
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raw_html = service_item.get_rendered_frame(0)
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self.display.text(raw_html, False)
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preview = self.display.preview()
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return preview
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self.force_page = False
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def format_slide(self, text, item):
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"""
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Calculate how much text can fit on a slide.
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``text``
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The words to go on the slides.
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``item``
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The :class:`~openlp.core.lib.serviceitem.ServiceItem` item object.
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"""
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log.debug('format slide')
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# Add line endings after each line of text used for bibles.
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line_end = '<br>'
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if item.is_capable(ItemCapabilities.NoLineBreaks):
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line_end = ' '
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# Bibles
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if item.is_capable(ItemCapabilities.CanWordSplit):
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pages = self._paginate_slide_words(text.split('\n'), line_end)
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# Songs and Custom
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elif item.is_capable(ItemCapabilities.CanSoftBreak):
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pages = []
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if '[---]' in text:
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while True:
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slides = text.split('\n[---]\n', 2)
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# If there are (at least) two occurrences of [---] we use the first two slides (and neglect the last
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# for now).
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if len(slides) == 3:
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html_text = expand_tags('\n'.join(slides[:2]))
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# We check both slides to determine if the optional split is needed (there is only one optional
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# split).
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else:
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html_text = expand_tags('\n'.join(slides))
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html_text = html_text.replace('\n', '<br>')
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if self._text_fits_on_slide(html_text):
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# The first two optional slides fit (as a whole) on one slide. Replace the first occurrence
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# of [---].
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text = text.replace('\n[---]', '', 1)
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else:
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# The first optional slide fits, which means we have to render the first optional slide.
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text_contains_split = '[---]' in text
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if text_contains_split:
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try:
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text_to_render, text = text.split('\n[---]\n', 1)
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except ValueError:
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text_to_render = text.split('\n[---]\n')[0]
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text = ''
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text_to_render, raw_tags, html_tags = self._get_start_tags(text_to_render)
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if text:
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text = raw_tags + text
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else:
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text_to_render = text
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text = ''
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lines = text_to_render.strip('\n').split('\n')
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slides = self._paginate_slide(lines, line_end)
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if len(slides) > 1 and text:
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# Add all slides apart from the last one the list.
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pages.extend(slides[:-1])
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if text_contains_split:
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text = slides[-1] + '\n[---]\n' + text
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else:
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text = slides[-1] + '\n' + text
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text = text.replace('<br>', '\n')
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else:
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pages.extend(slides)
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if '[---]' not in text:
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lines = text.strip('\n').split('\n')
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pages.extend(self._paginate_slide(lines, line_end))
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break
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else:
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# Clean up line endings.
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pages = self._paginate_slide(text.split('\n'), line_end)
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else:
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pages = self._paginate_slide(text.split('\n'), line_end)
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new_pages = []
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for page in pages:
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while page.endswith('<br>'):
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page = page[:-4]
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new_pages.append(page)
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return new_pages
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def _calculate_default(self):
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"""
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Calculate the default dimensions of the screen.
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"""
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screen_size = self.screens.current['size']
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self.width = screen_size.width()
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self.height = screen_size.height()
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self.screen_ratio = self.height / self.width
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log.debug('_calculate default %s, %f' % (screen_size, self.screen_ratio))
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# 90% is start of footer
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self.footer_start = int(self.height * 0.90)
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def get_main_rectangle(self, theme_data):
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"""
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Calculates the placement and size of the main rectangle.
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``theme_data``
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The theme information
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"""
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if not theme_data.font_main_override:
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return QtCore.QRect(10, 0, self.width - 20, self.footer_start)
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else:
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return QtCore.QRect(theme_data.font_main_x, theme_data.font_main_y,
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theme_data.font_main_width - 1, theme_data.font_main_height - 1)
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def get_footer_rectangle(self, theme_data):
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"""
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Calculates the placement and size of the footer rectangle.
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``theme_data``
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The theme data.
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"""
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if not theme_data.font_footer_override:
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return QtCore.QRect(10, self.footer_start, self.width - 20, self.height - self.footer_start)
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else:
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return QtCore.QRect(theme_data.font_footer_x,
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theme_data.font_footer_y, theme_data.font_footer_width - 1,
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theme_data.font_footer_height - 1)
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def _set_text_rectangle(self, theme_data, rect_main, rect_footer):
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"""
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Sets the rectangle within which text should be rendered.
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``theme_data``
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The theme data.
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``rect_main``
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The main text block.
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``rect_footer``
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The footer text block.
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"""
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log.debug('_set_text_rectangle %s , %s' % (rect_main, rect_footer))
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self._rect = rect_main
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self._rect_footer = rect_footer
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self.page_width = self._rect.width()
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self.page_height = self._rect.height()
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if theme_data.font_main_shadow:
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self.page_width -= int(theme_data.font_main_shadow_size)
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self.page_height -= int(theme_data.font_main_shadow_size)
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# For the life of my I don't know why we have to completely kill the QWebView in order for the display to work
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# properly, but we do. See bug #1041366 for an example of what happens if we take this out.
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self.web = None
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self.web = QtWebKit.QWebView()
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self.web.setVisible(False)
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self.web.resize(self.page_width, self.page_height)
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self.web_frame = self.web.page().mainFrame()
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# Adjust width and height to account for shadow. outline done in css.
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html = """<!DOCTYPE html><html><head><script>
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function show_text(newtext) {
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var main = document.getElementById('main');
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main.innerHTML = newtext;
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// We need to be sure that the page is loaded, that is why we
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// return the element's height (even though we do not use the
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// returned value).
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return main.offsetHeight;
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}
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</script><style>*{margin: 0; padding: 0; border: 0;}
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#main {position: absolute; top: 0px; %s %s}</style></head><body>
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<div id="main"></div></body></html>""" % \
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(build_lyrics_format_css(theme_data, self.page_width, self.page_height),
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build_lyrics_outline_css(theme_data))
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self.web.setHtml(html)
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self.empty_height = self.web_frame.contentsSize().height()
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def _paginate_slide(self, lines, line_end):
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"""
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Figure out how much text can appear on a slide, using the current theme settings.
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**Note:** The smallest possible "unit" of text for a slide is one line. If the line is too long it will be cut
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off when displayed.
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``lines``
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The text to be fitted on the slide split into lines.
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``line_end``
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The text added after each line. Either ``u' '`` or ``u'<br>``.
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"""
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log.debug('_paginate_slide - Start')
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formatted = []
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previous_html = ''
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previous_raw = ''
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separator = '<br>'
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html_lines = list(map(expand_tags, lines))
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# Text too long so go to next page.
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if not self._text_fits_on_slide(separator.join(html_lines)):
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html_text, previous_raw = self._binary_chop(
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formatted, previous_html, previous_raw, html_lines, lines, separator, '')
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else:
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previous_raw = separator.join(lines)
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formatted.append(previous_raw)
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log.debug('_paginate_slide - End')
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return formatted
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def _paginate_slide_words(self, lines, line_end):
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"""
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Figure out how much text can appear on a slide, using the current theme settings.
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**Note:** The smallest possible "unit" of text for a slide is one word. If one line is too long it will be
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processed word by word. This is sometimes need for **bible** verses.
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``lines``
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The text to be fitted on the slide split into lines.
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``line_end``
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The text added after each line. Either ``u' '`` or ``u'<br>``. This is needed for **bibles**.
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"""
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log.debug('_paginate_slide_words - Start')
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formatted = []
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previous_html = ''
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previous_raw = ''
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for line in lines:
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line = line.strip()
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html_line = expand_tags(line)
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# Text too long so go to next page.
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if not self._text_fits_on_slide(previous_html + html_line):
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# Check if there was a verse before the current one and append it, when it fits on the page.
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if previous_html:
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if self._text_fits_on_slide(previous_html):
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formatted.append(previous_raw)
|
|
previous_html = ''
|
|
previous_raw = ''
|
|
# Now check if the current verse will fit, if it does not we have to start to process the verse
|
|
# word by word.
|
|
if self._text_fits_on_slide(html_line):
|
|
previous_html = html_line + line_end
|
|
previous_raw = line + line_end
|
|
continue
|
|
# Figure out how many words of the line will fit on screen as the line will not fit as a whole.
|
|
raw_words = self._words_split(line)
|
|
html_words = list(map(expand_tags, raw_words))
|
|
previous_html, previous_raw = \
|
|
self._binary_chop(formatted, previous_html, previous_raw, html_words, raw_words, ' ', line_end)
|
|
else:
|
|
previous_html += html_line + line_end
|
|
previous_raw += line + line_end
|
|
formatted.append(previous_raw)
|
|
log.debug('_paginate_slide_words - End')
|
|
return formatted
|
|
|
|
def _get_start_tags(self, raw_text):
|
|
"""
|
|
Tests the given text for not closed formatting tags and returns a tuple consisting of three unicode strings::
|
|
|
|
(u'{st}{r}Text text text{/r}{/st}', u'{st}{r}', u'<strong><span style="-webkit-text-fill-color:red">')
|
|
|
|
The first unicode string is the text, with correct closing tags. The second unicode string are OpenLP's opening
|
|
formatting tags and the third unicode string the html opening formatting tags.
|
|
|
|
``raw_text``
|
|
The text to test. The text must **not** contain html tags, only OpenLP formatting tags are allowed::
|
|
|
|
{st}{r}Text text text
|
|
"""
|
|
raw_tags = []
|
|
html_tags = []
|
|
for tag in FormattingTags.get_html_tags():
|
|
if tag['start tag'] == '{br}':
|
|
continue
|
|
if raw_text.count(tag['start tag']) != raw_text.count(tag['end tag']):
|
|
raw_tags.append((raw_text.find(tag['start tag']), tag['start tag'], tag['end tag']))
|
|
html_tags.append((raw_text.find(tag['start tag']), tag['start html']))
|
|
# Sort the lists, so that the tags which were opened first on the first slide (the text we are checking) will be
|
|
# opened first on the next slide as well.
|
|
raw_tags.sort(key=lambda tag: tag[0])
|
|
html_tags.sort(key=lambda tag: tag[0])
|
|
# Create a list with closing tags for the raw_text.
|
|
end_tags = []
|
|
start_tags = []
|
|
for tag in raw_tags:
|
|
start_tags.append(tag[1])
|
|
end_tags.append(tag[2])
|
|
end_tags.reverse()
|
|
# Remove the indexes.
|
|
html_tags = [tag[1] for tag in html_tags]
|
|
return raw_text + ''.join(end_tags), ''.join(start_tags), ''.join(html_tags)
|
|
|
|
def _binary_chop(self, formatted, previous_html, previous_raw, html_list, raw_list, separator, line_end):
|
|
"""
|
|
This implements the binary chop algorithm for faster rendering. This algorithm works line based (line by line)
|
|
and word based (word by word). It is assumed that this method is **only** called, when the lines/words to be
|
|
rendered do **not** fit as a whole.
|
|
|
|
``formatted``
|
|
The list to append any slides.
|
|
|
|
``previous_html``
|
|
The html text which is know to fit on a slide, but is not yet added to the list of slides. (unicode string)
|
|
|
|
``previous_raw``
|
|
The raw text (with formatting tags) which is know to fit on a slide, but is not yet added to the list of
|
|
slides. (unicode string)
|
|
|
|
``html_list``
|
|
The elements which do not fit on a slide and needs to be processed using the binary chop. The text contains
|
|
html.
|
|
|
|
``raw_list``
|
|
The elements which do not fit on a slide and needs to be processed using the binary chop. The elements can
|
|
contain formatting tags.
|
|
|
|
``separator``
|
|
The separator for the elements. For lines this is ``u'<br>'`` and for words this is ``u' '``.
|
|
|
|
``line_end``
|
|
The text added after each "element line". Either ``u' '`` or ``u'<br>``. This is needed for bibles.
|
|
"""
|
|
smallest_index = 0
|
|
highest_index = len(html_list) - 1
|
|
index = highest_index // 2
|
|
while True:
|
|
if not self._text_fits_on_slide(previous_html + separator.join(html_list[:index + 1]).strip()):
|
|
# We know that it does not fit, so change/calculate the new index and highest_index accordingly.
|
|
highest_index = index
|
|
index = index - (index - smallest_index) // 2
|
|
else:
|
|
smallest_index = index
|
|
index = index + (highest_index - index) // 2
|
|
# We found the number of words which will fit.
|
|
if smallest_index == index or highest_index == index:
|
|
index = smallest_index
|
|
text = previous_raw.rstrip('<br>') + separator.join(raw_list[:index + 1])
|
|
text, raw_tags, html_tags = self._get_start_tags(text)
|
|
formatted.append(text)
|
|
previous_html = ''
|
|
previous_raw = ''
|
|
# Stop here as the theme line count was requested.
|
|
if self.force_page:
|
|
Registry().execute('theme_line_count', index + 1)
|
|
break
|
|
else:
|
|
continue
|
|
# Check if the remaining elements fit on the slide.
|
|
if self._text_fits_on_slide(html_tags + separator.join(html_list[index + 1:]).strip()):
|
|
previous_html = html_tags + separator.join(html_list[index + 1:]).strip() + line_end
|
|
previous_raw = raw_tags + separator.join(raw_list[index + 1:]).strip() + line_end
|
|
break
|
|
else:
|
|
# The remaining elements do not fit, thus reset the indexes, create a new list and continue.
|
|
raw_list = raw_list[index + 1:]
|
|
raw_list[0] = raw_tags + raw_list[0]
|
|
html_list = html_list[index + 1:]
|
|
html_list[0] = html_tags + html_list[0]
|
|
smallest_index = 0
|
|
highest_index = len(html_list) - 1
|
|
index = highest_index // 2
|
|
return previous_html, previous_raw
|
|
|
|
def _text_fits_on_slide(self, text):
|
|
"""
|
|
Checks if the given ``text`` fits on a slide. If it does ``True`` is returned, otherwise ``False``.
|
|
|
|
``text``
|
|
The text to check. It may contain HTML tags.
|
|
"""
|
|
self.web_frame.evaluateJavaScript('show_text("%s")' % text.replace('\\', '\\\\').replace('\"', '\\\"'))
|
|
return self.web_frame.contentsSize().height() <= self.empty_height
|
|
|
|
def _words_split(self, line):
|
|
"""
|
|
Split the slide up by word so can wrap better
|
|
"""
|
|
# this parse we are to be wordy
|
|
line = line.replace('\n', ' ')
|
|
return line.split(' ')
|
|
|
|
def _get_image_manager(self):
|
|
"""
|
|
Adds the image manager to the class dynamically
|
|
"""
|
|
if not hasattr(self, '_image_manager'):
|
|
self._image_manager = Registry().get('image_manager')
|
|
return self._image_manager
|
|
|
|
image_manager = property(_get_image_manager)
|
|
|
|
def _get_theme_manager(self):
|
|
"""
|
|
Adds the theme manager to the class dynamically
|
|
"""
|
|
if not hasattr(self, '_theme_manager'):
|
|
self._theme_manager = Registry().get('theme_manager')
|
|
return self._theme_manager
|
|
|
|
theme_manager = property(_get_theme_manager)
|