def __init__(self, shortcuts, parent=None, debug_javascript=False):
QWebPage.__init__(self, parent)
self.setObjectName("py_bridge")
self.in_paged_mode = False
# Use this to pass arbitrary JSON encodable objects between python and
# javascript. In python get/set the value as: self.bridge_value. In
# javascript, get/set the value as: py_bridge.value
self.bridge_value = None
self.first_load = True
self.debug_javascript = debug_javascript
self.anchor_positions = {}
self.index_anchors = set()
self.current_language = None
self.loaded_javascript = False
self.js_loader = JavaScriptLoader(
dynamic_coffeescript=self.debug_javascript)
self.in_fullscreen_mode = False
self.setLinkDelegationPolicy(self.DelegateAllLinks)
self.scroll_marks = []
self.shortcuts = shortcuts
pal = self.palette()
pal.setBrush(QPalette.Background, QColor(0xee, 0xee, 0xee))
self.setPalette(pal)
self.page_position = PagePosition(self)
settings = self.settings()
# Fonts
self.all_viewer_plugins = tuple(all_viewer_plugins())
for pl in self.all_viewer_plugins:
pl.load_fonts()
opts = config().parse()
self.set_font_settings(opts)
# Security
settings.setAttribute(QWebSettings.JavaEnabled, False)
settings.setAttribute(QWebSettings.PluginsEnabled, False)
settings.setAttribute(QWebSettings.JavascriptCanOpenWindows, False)
settings.setAttribute(QWebSettings.JavascriptCanAccessClipboard, False)
# Miscellaneous
settings.setAttribute(QWebSettings.LinksIncludedInFocusChain, True)
settings.setAttribute(QWebSettings.DeveloperExtrasEnabled, True)
self.set_user_stylesheet(opts)
self.misc_config(opts)
# Load javascript
self.mainFrame().javaScriptWindowObjectCleared.connect(
self.add_window_objects)
self.turn_off_internal_scrollbars()
def __init__(self, shortcuts, parent=None, debug_javascript=False):
QWebPage.__init__(self, parent)
self.setObjectName("py_bridge")
self.in_paged_mode = False
# Use this to pass arbitrary JSON encodable objects between python and
# javascript. In python get/set the value as: self.bridge_value. In
# javascript, get/set the value as: py_bridge.value
self.bridge_value = None
self.first_load = True
self.debug_javascript = debug_javascript
self.anchor_positions = {}
self.index_anchors = set()
self.current_language = None
self.loaded_javascript = False
self.js_loader = JavaScriptLoader(
dynamic_coffeescript=self.debug_javascript)
self.in_fullscreen_mode = False
self.setLinkDelegationPolicy(self.DelegateAllLinks)
self.scroll_marks = []
self.shortcuts = shortcuts
pal = self.palette()
pal.setBrush(QPalette.Background, QColor(0xee, 0xee, 0xee))
self.setPalette(pal)
self.page_position = PagePosition(self)
settings = self.settings()
# Fonts
load_builtin_fonts()
self.all_viewer_plugins = tuple(all_viewer_plugins())
for pl in self.all_viewer_plugins:
pl.load_fonts()
opts = config().parse()
self.set_font_settings(opts)
# Security
settings.setAttribute(QWebSettings.JavaEnabled, False)
settings.setAttribute(QWebSettings.PluginsEnabled, False)
settings.setAttribute(QWebSettings.JavascriptCanOpenWindows, False)
settings.setAttribute(QWebSettings.JavascriptCanAccessClipboard, False)
# Miscellaneous
settings.setAttribute(QWebSettings.LinksIncludedInFocusChain, True)
settings.setAttribute(QWebSettings.DeveloperExtrasEnabled, True)
self.set_user_stylesheet(opts)
self.misc_config(opts)
# Load javascript
self.mainFrame().javaScriptWindowObjectCleared.connect(
self.add_window_objects)
self.turn_off_internal_scrollbars()
class Document(QWebPage): # {{{
page_turn = pyqtSignal(object)
mark_element = pyqtSignal(QWebElement)
settings_changed = pyqtSignal()
def set_font_settings(self, opts):
settings = self.settings()
apply_settings(settings, opts)
def do_config(self, parent=None):
d = ConfigDialog(self.shortcuts, parent)
if d.exec_() == QDialog.Accepted:
opts = config().parse()
self.apply_settings(opts)
def apply_settings(self, opts):
with self.page_position:
self.set_font_settings(opts)
self.set_user_stylesheet(opts)
self.misc_config(opts)
self.settings_changed.emit()
self.after_load()
def __init__(self, shortcuts, parent=None, debug_javascript=False):
QWebPage.__init__(self, parent)
self.setObjectName("py_bridge")
self.in_paged_mode = False
# Use this to pass arbitrary JSON encodable objects between python and
# javascript. In python get/set the value as: self.bridge_value. In
# javascript, get/set the value as: py_bridge.value
self.bridge_value = None
self.first_load = True
self.debug_javascript = debug_javascript
self.anchor_positions = {}
self.index_anchors = set()
self.current_language = None
self.loaded_javascript = False
self.js_loader = JavaScriptLoader(
dynamic_coffeescript=self.debug_javascript)
self.in_fullscreen_mode = False
self.setLinkDelegationPolicy(self.DelegateAllLinks)
self.scroll_marks = []
self.shortcuts = shortcuts
pal = self.palette()
pal.setBrush(QPalette.Background, QColor(0xee, 0xee, 0xee))
self.setPalette(pal)
self.page_position = PagePosition(self)
settings = self.settings()
# Fonts
self.all_viewer_plugins = tuple(all_viewer_plugins())
for pl in self.all_viewer_plugins:
pl.load_fonts()
opts = config().parse()
self.set_font_settings(opts)
# Security
settings.setAttribute(QWebSettings.JavaEnabled, False)
settings.setAttribute(QWebSettings.PluginsEnabled, False)
settings.setAttribute(QWebSettings.JavascriptCanOpenWindows, False)
settings.setAttribute(QWebSettings.JavascriptCanAccessClipboard, False)
# Miscellaneous
settings.setAttribute(QWebSettings.LinksIncludedInFocusChain, True)
settings.setAttribute(QWebSettings.DeveloperExtrasEnabled, True)
self.set_user_stylesheet(opts)
self.misc_config(opts)
# Load javascript
self.mainFrame().javaScriptWindowObjectCleared.connect(
self.add_window_objects)
self.turn_off_internal_scrollbars()
def turn_off_internal_scrollbars(self):
mf = self.mainFrame()
mf.setScrollBarPolicy(Qt.Vertical, Qt.ScrollBarAlwaysOff)
mf.setScrollBarPolicy(Qt.Horizontal, Qt.ScrollBarAlwaysOff)
def set_user_stylesheet(self, opts):
bg = opts.background_color or 'white'
brules = ['background-color: %s !important'%bg]
prefix = '''
body { %s }
'''%('; '.join(brules))
if opts.text_color:
prefix += '\n\nbody, p, div { color: %s !important }'%opts.text_color
raw = prefix + opts.user_css
raw = '::selection {background:#ffff00; color:#000;}\n'+raw
data = 'data:text/css;charset=utf-8;base64,'
data += b64encode(raw.encode('utf-8'))
self.settings().setUserStyleSheetUrl(QUrl(data))
def findText(self, q, flags):
if self.hyphenatable:
q = unicode(q)
hyphenated_q = self.javascript(
'hyphenate_text(%s, "%s")' % (json.dumps(q, ensure_ascii=False), self.loaded_lang), typ='string')
if QWebPage.findText(self, hyphenated_q, flags):
return True
return QWebPage.findText(self, q, flags)
def misc_config(self, opts):
self.hyphenate = opts.hyphenate
self.hyphenate_default_lang = opts.hyphenate_default_lang
self.do_fit_images = opts.fit_images
self.page_flip_duration = opts.page_flip_duration
self.enable_page_flip = self.page_flip_duration > 0.1
self.font_magnification_step = opts.font_magnification_step
self.wheel_flips_pages = opts.wheel_flips_pages
self.line_scrolling_stops_on_pagebreaks = opts.line_scrolling_stops_on_pagebreaks
screen_width = QApplication.desktop().screenGeometry().width()
# Leave some space for the scrollbar and some border
self.max_fs_width = min(opts.max_fs_width, screen_width-50)
self.fullscreen_clock = opts.fullscreen_clock
self.fullscreen_scrollbar = opts.fullscreen_scrollbar
self.fullscreen_pos = opts.fullscreen_pos
self.start_in_fullscreen = opts.start_in_fullscreen
self.show_fullscreen_help = opts.show_fullscreen_help
self.use_book_margins = opts.use_book_margins
self.cols_per_screen = opts.cols_per_screen
self.side_margin = opts.side_margin
self.top_margin, self.bottom_margin = opts.top_margin, opts.bottom_margin
self.show_controls = opts.show_controls
def fit_images(self):
if self.do_fit_images and not self.in_paged_mode:
self.javascript('setup_image_scaling_handlers()')
def add_window_objects(self):
self.mainFrame().addToJavaScriptWindowObject("py_bridge", self)
self.javascript('''
py_bridge.__defineGetter__('value', function() {
return JSON.parse(this._pass_json_value);
});
py_bridge.__defineSetter__('value', function(val) {
this._pass_json_value = JSON.stringify(val);
});
''')
self.loaded_javascript = False
def load_javascript_libraries(self):
if self.loaded_javascript:
return
self.loaded_javascript = True
evaljs = self.mainFrame().evaluateJavaScript
self.loaded_lang = self.js_loader(evaljs, self.current_language,
self.hyphenate_default_lang)
mjpath = P(u'viewer/mathjax').replace(os.sep, '/')
if iswindows:
mjpath = u'/' + mjpath
self.javascript(u'window.mathjax.base = %s'%(json.dumps(mjpath,
ensure_ascii=False)))
for pl in self.all_viewer_plugins:
pl.load_javascript(evaljs)
evaljs('py_bridge.mark_element.connect(window.calibre_extract.mark)')
@pyqtSignature("")
def animated_scroll_done(self):
self.emit(SIGNAL('animated_scroll_done()'))
@property
def hyphenatable(self):
# Qt fails to render soft hyphens correctly on windows xp
return not isxp and self.hyphenate and getattr(self, 'loaded_lang', '')
@pyqtSignature("")
def init_hyphenate(self):
if self.hyphenatable:
self.javascript('do_hyphenation("%s")'%self.loaded_lang)
@pyqtSlot(int)
def page_turn_requested(self, backwards):
self.page_turn.emit(bool(backwards))
def _pass_json_value_getter(self):
val = json.dumps(self.bridge_value)
return QString(val)
def _pass_json_value_setter(self, value):
self.bridge_value = json.loads(unicode(value))
_pass_json_value = pyqtProperty(QString, fget=_pass_json_value_getter,
fset=_pass_json_value_setter)
def after_load(self, last_loaded_path=None):
self.javascript('window.paged_display.read_document_margins()')
self.set_bottom_padding(0)
self.fit_images()
self.init_hyphenate()
self.javascript('full_screen.save_margins()')
if self.in_fullscreen_mode:
self.switch_to_fullscreen_mode()
if self.in_paged_mode:
self.switch_to_paged_mode(last_loaded_path=last_loaded_path)
self.read_anchor_positions(use_cache=False)
evaljs = self.mainFrame().evaluateJavaScript
for pl in self.all_viewer_plugins:
pl.run_javascript(evaljs)
self.javascript('window.mathjax.check_for_math()')
self.first_load = False
def colors(self):
self.javascript('''
bs = getComputedStyle(document.body);
py_bridge.value = [bs.backgroundColor, bs.color]
''')
ans = self.bridge_value
return (ans if isinstance(ans, list) else ['white', 'black'])
def read_anchor_positions(self, use_cache=True):
self.bridge_value = tuple(self.index_anchors)
self.javascript(u'''
py_bridge.value = book_indexing.anchor_positions(py_bridge.value, %s);
'''%('true' if use_cache else 'false'))
self.anchor_positions = self.bridge_value
if not isinstance(self.anchor_positions, dict):
# Some weird javascript error happened
self.anchor_positions = {}
return {k:tuple(v) for k, v in self.anchor_positions.iteritems()}
def switch_to_paged_mode(self, onresize=False, last_loaded_path=None):
if onresize and not self.loaded_javascript:
return
self.javascript('''
window.paged_display.use_document_margins = %s;
window.paged_display.set_geometry(%d, %d, %d, %d);
'''%(
('true' if self.use_book_margins else 'false'),
self.cols_per_screen, self.top_margin, self.side_margin,
self.bottom_margin
))
force_fullscreen_layout = bool(getattr(last_loaded_path,
'is_single_page', False))
f = 'true' if force_fullscreen_layout else 'false'
side_margin = self.javascript('window.paged_display.layout(%s)'%f, typ=int)
# Setup the contents size to ensure that there is a right most margin.
# Without this WebKit renders the final column with no margin, as the
# columns extend beyond the boundaries (and margin) of body
mf = self.mainFrame()
sz = mf.contentsSize()
scroll_width = self.javascript('document.body.scrollWidth', int)
# At this point sz.width() is not reliable, presumably because Qt
# has not yet been updated
if scroll_width > self.window_width:
sz.setWidth(scroll_width+side_margin)
self.setPreferredContentsSize(sz)
self.javascript('window.paged_display.fit_images()')
@property
def column_boundaries(self):
if not self.loaded_javascript:
return (0, 1)
self.javascript(u'py_bridge.value = paged_display.column_boundaries()')
return tuple(self.bridge_value)
def after_resize(self):
if self.in_paged_mode:
self.setPreferredContentsSize(QSize())
self.switch_to_paged_mode(onresize=True)
self.javascript('window.mathjax.after_resize()')
def switch_to_fullscreen_mode(self):
self.in_fullscreen_mode = True
self.javascript('full_screen.on(%d, %s)'%(self.max_fs_width,
'true' if self.in_paged_mode else 'false'))
def switch_to_window_mode(self):
self.in_fullscreen_mode = False
self.javascript('full_screen.off(%s)'%('true' if self.in_paged_mode
else 'false'))
@pyqtSignature("QString")
def debug(self, msg):
prints(msg)
def reference_mode(self, enable):
self.javascript(('enter' if enable else 'leave')+'_reference_mode()')
def set_reference_prefix(self, prefix):
self.javascript('reference_prefix = "%s"'%prefix)
def goto(self, ref):
self.javascript('goto_reference("%s")'%ref)
def goto_bookmark(self, bm):
if bm['type'] == 'legacy':
bm = bm['pos']
bm = bm.strip()
if bm.startswith('>'):
bm = bm[1:].strip()
self.javascript('scroll_to_bookmark("%s")'%bm)
elif bm['type'] == 'cfi':
self.page_position.to_pos(bm['pos'])
def javascript(self, string, typ=None):
ans = self.mainFrame().evaluateJavaScript(string)
if typ in {'int', int}:
ans = ans.toInt()
if ans[1]:
return ans[0]
return 0
if typ in {'float', float}:
ans = ans.toReal()
return ans[0] if ans[1] else 0.0
if typ == 'string':
return unicode(ans.toString())
return ans
def javaScriptConsoleMessage(self, msg, lineno, msgid):
if self.debug_javascript:
prints(msg)
else:
return QWebPage.javaScriptConsoleMessage(self, msg, lineno, msgid)
def javaScriptAlert(self, frame, msg):
if self.debug_javascript:
prints(msg)
else:
return QWebPage.javaScriptAlert(self, frame, msg)
def scroll_by(self, dx=0, dy=0):
self.mainFrame().scroll(dx, dy)
def scroll_to(self, x=0, y=0):
self.mainFrame().setScrollPosition(QPoint(x, y))
def jump_to_anchor(self, anchor):
if not self.loaded_javascript:
return
self.javascript('window.paged_display.jump_to_anchor("%s")'%anchor)
def element_ypos(self, elem):
ans, ok = elem.evaluateJavaScript('$(this).offset().top').toInt()
if not ok:
raise ValueError('No ypos found')
return ans
def elem_outer_xml(self, elem):
return unicode(elem.toOuterXml())
def bookmark(self):
pos = self.page_position.current_pos
return {'type':'cfi', 'pos':pos}
@property
def at_bottom(self):
return self.height - self.ypos <= self.window_height
@property
def at_top(self):
return self.ypos <=0
def test(self):
pass
@property
def ypos(self):
return self.mainFrame().scrollPosition().y()
@property
def window_height(self):
return self.javascript('window.innerHeight', 'int')
@property
def window_width(self):
return self.javascript('window.innerWidth', 'int')
@property
def xpos(self):
return self.mainFrame().scrollPosition().x()
@dynamic_property
def scroll_fraction(self):
def fget(self):
if self.in_paged_mode:
return self.javascript('''
ans = 0.0;
if (window.paged_display) {
ans = window.paged_display.current_pos();
}
ans;''', typ='float')
else:
try:
return abs(float(self.ypos)/(self.height-self.window_height))
except ZeroDivisionError:
return 0.
def fset(self, val):
if self.in_paged_mode and self.loaded_javascript:
self.javascript('paged_display.scroll_to_pos(%f)'%val)
else:
npos = val * (self.height - self.window_height)
if npos < 0:
npos = 0
self.scroll_to(x=self.xpos, y=npos)
return property(fget=fget, fset=fset)
@property
def hscroll_fraction(self):
try:
return float(self.xpos)/self.width
except ZeroDivisionError:
return 0.
@property
def height(self):
# Note that document.body.offsetHeight does not include top and bottom
# margins on body and in some cases does not include the top margin on
# the first element inside body either. See ticket #8791 for an example
# of the latter.
q = self.mainFrame().contentsSize().height()
if q < 0:
# Don't know if this is still needed, but it can't hurt
j = self.javascript('document.body.offsetHeight', 'int')
if j >= 0:
q = j
return q
@property
def width(self):
return self.mainFrame().contentsSize().width() # offsetWidth gives inaccurate results
def set_bottom_padding(self, amount):
s = QSize(-1, -1) if amount == 0 else QSize(self.viewportSize().width(),
self.height+amount)
self.setPreferredContentsSize(s)
def extract_node(self):
return unicode(self.mainFrame().evaluateJavaScript(
'window.calibre_extract.extract()').toString())
class Document(QWebPage): # {{{
page_turn = pyqtSignal(object)
mark_element = pyqtSignal(QWebElement)
settings_changed = pyqtSignal()
def set_font_settings(self, opts):
settings = self.settings()
apply_settings(settings, opts)
def do_config(self, parent=None):
d = ConfigDialog(self.shortcuts, parent)
if d.exec_() == QDialog.Accepted:
opts = config().parse()
self.apply_settings(opts)
def apply_settings(self, opts):
with self.page_position:
self.set_font_settings(opts)
self.set_user_stylesheet(opts)
self.misc_config(opts)
self.settings_changed.emit()
self.after_load()
def __init__(self, shortcuts, parent=None, debug_javascript=False):
QWebPage.__init__(self, parent)
self.setObjectName("py_bridge")
self.in_paged_mode = False
# Use this to pass arbitrary JSON encodable objects between python and
# javascript. In python get/set the value as: self.bridge_value. In
# javascript, get/set the value as: py_bridge.value
self.bridge_value = None
self.first_load = True
self.debug_javascript = debug_javascript
self.anchor_positions = {}
self.index_anchors = set()
self.current_language = None
self.loaded_javascript = False
self.js_loader = JavaScriptLoader(
dynamic_coffeescript=self.debug_javascript)
self.in_fullscreen_mode = False
self.setLinkDelegationPolicy(self.DelegateAllLinks)
self.scroll_marks = []
self.shortcuts = shortcuts
pal = self.palette()
pal.setBrush(QPalette.Background, QColor(0xee, 0xee, 0xee))
self.setPalette(pal)
self.page_position = PagePosition(self)
settings = self.settings()
# Fonts
self.all_viewer_plugins = tuple(all_viewer_plugins())
for pl in self.all_viewer_plugins:
pl.load_fonts()
opts = config().parse()
self.set_font_settings(opts)
# Security
settings.setAttribute(QWebSettings.JavaEnabled, False)
settings.setAttribute(QWebSettings.PluginsEnabled, False)
settings.setAttribute(QWebSettings.JavascriptCanOpenWindows, False)
settings.setAttribute(QWebSettings.JavascriptCanAccessClipboard, False)
# Miscellaneous
settings.setAttribute(QWebSettings.LinksIncludedInFocusChain, True)
settings.setAttribute(QWebSettings.DeveloperExtrasEnabled, True)
self.set_user_stylesheet(opts)
self.misc_config(opts)
# Load javascript
self.mainFrame().javaScriptWindowObjectCleared.connect(
self.add_window_objects)
self.turn_off_internal_scrollbars()
def turn_off_internal_scrollbars(self):
mf = self.mainFrame()
mf.setScrollBarPolicy(Qt.Vertical, Qt.ScrollBarAlwaysOff)
mf.setScrollBarPolicy(Qt.Horizontal, Qt.ScrollBarAlwaysOff)
def set_user_stylesheet(self, opts):
bg = opts.background_color or 'white'
brules = ['background-color: %s !important'%bg]
prefix = '''
body { %s }
'''%('; '.join(brules))
if opts.text_color:
prefix += '\n\nbody, p, div { color: %s !important }'%opts.text_color
raw = prefix + opts.user_css
raw = '::selection {background:#ffff00; color:#000;}\n'+raw
data = 'data:text/css;charset=utf-8;base64,'
data += b64encode(raw.encode('utf-8'))
self.settings().setUserStyleSheetUrl(QUrl(data))
def findText(self, q, flags):
if self.hyphenatable:
q = unicode(q)
hyphenated_q = self.javascript(
'hyphenate_text(%s, "%s")' % (json.dumps(q, ensure_ascii=False), self.loaded_lang), typ='string')
if QWebPage.findText(self, hyphenated_q, flags):
return True
return QWebPage.findText(self, q, flags)
def misc_config(self, opts):
self.hyphenate = opts.hyphenate
self.hyphenate_default_lang = opts.hyphenate_default_lang
self.do_fit_images = opts.fit_images
self.page_flip_duration = opts.page_flip_duration
self.enable_page_flip = self.page_flip_duration > 0.1
self.font_magnification_step = opts.font_magnification_step
self.wheel_flips_pages = opts.wheel_flips_pages
self.line_scrolling_stops_on_pagebreaks = opts.line_scrolling_stops_on_pagebreaks
screen_width = QApplication.desktop().screenGeometry().width()
# Leave some space for the scrollbar and some border
self.max_fs_width = min(opts.max_fs_width, screen_width-50)
self.fullscreen_clock = opts.fullscreen_clock
self.fullscreen_scrollbar = opts.fullscreen_scrollbar
self.fullscreen_pos = opts.fullscreen_pos
self.start_in_fullscreen = opts.start_in_fullscreen
self.show_fullscreen_help = opts.show_fullscreen_help
self.use_book_margins = opts.use_book_margins
self.cols_per_screen = opts.cols_per_screen
self.side_margin = opts.side_margin
self.top_margin, self.bottom_margin = opts.top_margin, opts.bottom_margin
self.show_controls = opts.show_controls
def fit_images(self):
if self.do_fit_images and not self.in_paged_mode:
self.javascript('setup_image_scaling_handlers()')
def add_window_objects(self):
self.mainFrame().addToJavaScriptWindowObject("py_bridge", self)
self.javascript('''
py_bridge.__defineGetter__('value', function() {
return JSON.parse(this._pass_json_value);
});
py_bridge.__defineSetter__('value', function(val) {
this._pass_json_value = JSON.stringify(val);
});
''')
self.loaded_javascript = False
def load_javascript_libraries(self):
if self.loaded_javascript:
return
self.loaded_javascript = True
evaljs = self.mainFrame().evaluateJavaScript
self.loaded_lang = self.js_loader(evaljs, self.current_language,
self.hyphenate_default_lang)
mjpath = P(u'viewer/mathjax').replace(os.sep, '/')
if iswindows:
mjpath = u'/' + mjpath
self.javascript(u'window.mathjax.base = %s'%(json.dumps(mjpath,
ensure_ascii=False)))
for pl in self.all_viewer_plugins:
pl.load_javascript(evaljs)
evaljs('py_bridge.mark_element.connect(window.calibre_extract.mark)')
@pyqtSignature("")
def animated_scroll_done(self):
self.emit(SIGNAL('animated_scroll_done()'))
@property
def hyphenatable(self):
# Qt fails to render soft hyphens correctly on windows xp
return not isxp and self.hyphenate and getattr(self, 'loaded_lang', '')
@pyqtSignature("")
def init_hyphenate(self):
if self.hyphenatable:
self.javascript('do_hyphenation("%s")'%self.loaded_lang)
@pyqtSlot(int)
def page_turn_requested(self, backwards):
self.page_turn.emit(bool(backwards))
def _pass_json_value_getter(self):
val = json.dumps(self.bridge_value)
return QString(val)
def _pass_json_value_setter(self, value):
self.bridge_value = json.loads(unicode(value))
_pass_json_value = pyqtProperty(QString, fget=_pass_json_value_getter,
fset=_pass_json_value_setter)
def after_load(self, last_loaded_path=None):
self.javascript('window.paged_display.read_document_margins()')
self.set_bottom_padding(0)
self.fit_images()
self.init_hyphenate()
self.javascript('full_screen.save_margins()')
if self.in_fullscreen_mode:
self.switch_to_fullscreen_mode()
if self.in_paged_mode:
self.switch_to_paged_mode(last_loaded_path=last_loaded_path)
self.read_anchor_positions(use_cache=False)
evaljs = self.mainFrame().evaluateJavaScript
for pl in self.all_viewer_plugins:
pl.run_javascript(evaljs)
self.javascript('window.mathjax.check_for_math()')
self.first_load = False
def colors(self):
self.javascript('''
bs = getComputedStyle(document.body);
py_bridge.value = [bs.backgroundColor, bs.color]
''')
ans = self.bridge_value
return (ans if isinstance(ans, list) else ['white', 'black'])
def read_anchor_positions(self, use_cache=True):
self.bridge_value = tuple(self.index_anchors)
self.javascript(u'''
py_bridge.value = book_indexing.anchor_positions(py_bridge.value, %s);
'''%('true' if use_cache else 'false'))
self.anchor_positions = self.bridge_value
if not isinstance(self.anchor_positions, dict):
# Some weird javascript error happened
self.anchor_positions = {}
return {k:tuple(v) for k, v in self.anchor_positions.iteritems()}
def switch_to_paged_mode(self, onresize=False, last_loaded_path=None):
if onresize and not self.loaded_javascript:
return
self.javascript('''
window.paged_display.use_document_margins = %s;
window.paged_display.set_geometry(%d, %d, %d, %d);
'''%(
('true' if self.use_book_margins else 'false'),
self.cols_per_screen, self.top_margin, self.side_margin,
self.bottom_margin
))
force_fullscreen_layout = bool(getattr(last_loaded_path,
'is_single_page', False))
f = 'true' if force_fullscreen_layout else 'false'
side_margin = self.javascript('window.paged_display.layout(%s)'%f, typ=int)
# Setup the contents size to ensure that there is a right most margin.
# Without this WebKit renders the final column with no margin, as the
# columns extend beyond the boundaries (and margin) of body
mf = self.mainFrame()
sz = mf.contentsSize()
scroll_width = self.javascript('document.body.scrollWidth', int)
# At this point sz.width() is not reliable, presumably because Qt
# has not yet been updated
if scroll_width > self.window_width:
sz.setWidth(scroll_width+side_margin)
self.setPreferredContentsSize(sz)
self.javascript('window.paged_display.fit_images()')
@property
def column_boundaries(self):
if not self.loaded_javascript:
return (0, 1)
self.javascript(u'py_bridge.value = paged_display.column_boundaries()')
return tuple(self.bridge_value)
def after_resize(self):
if self.in_paged_mode:
self.setPreferredContentsSize(QSize())
self.switch_to_paged_mode(onresize=True)
self.javascript('window.mathjax.after_resize()')
def switch_to_fullscreen_mode(self):
self.in_fullscreen_mode = True
self.javascript('full_screen.on(%d, %s)'%(self.max_fs_width,
'true' if self.in_paged_mode else 'false'))
def switch_to_window_mode(self):
self.in_fullscreen_mode = False
self.javascript('full_screen.off(%s)'%('true' if self.in_paged_mode
else 'false'))
@pyqtSignature("QString")
def debug(self, msg):
prints(msg)
def reference_mode(self, enable):
self.javascript(('enter' if enable else 'leave')+'_reference_mode()')
def set_reference_prefix(self, prefix):
self.javascript('reference_prefix = "%s"'%prefix)
def goto(self, ref):
self.javascript('goto_reference("%s")'%ref)
def goto_bookmark(self, bm):
if bm['type'] == 'legacy':
bm = bm['pos']
bm = bm.strip()
if bm.startswith('>'):
bm = bm[1:].strip()
self.javascript('scroll_to_bookmark("%s")'%bm)
elif bm['type'] == 'cfi':
self.page_position.to_pos(bm['pos'])
def javascript(self, string, typ=None):
ans = self.mainFrame().evaluateJavaScript(string)
if typ in {'int', int}:
ans = ans.toInt()
if ans[1]:
return ans[0]
return 0
if typ in {'float', float}:
ans = ans.toReal()
return ans[0] if ans[1] else 0.0
if typ == 'string':
return unicode(ans.toString())
return ans
def javaScriptConsoleMessage(self, msg, lineno, msgid):
if self.debug_javascript:
prints(msg)
else:
return QWebPage.javaScriptConsoleMessage(self, msg, lineno, msgid)
def javaScriptAlert(self, frame, msg):
if self.debug_javascript:
prints(msg)
else:
return QWebPage.javaScriptAlert(self, frame, msg)
def scroll_by(self, dx=0, dy=0):
self.mainFrame().scroll(dx, dy)
def scroll_to(self, x=0, y=0):
self.mainFrame().setScrollPosition(QPoint(x, y))
def jump_to_anchor(self, anchor):
if not self.loaded_javascript:
return
self.javascript('window.paged_display.jump_to_anchor("%s")'%anchor)
def element_ypos(self, elem):
ans, ok = elem.evaluateJavaScript('$(this).offset().top').toInt()
if not ok:
raise ValueError('No ypos found')
return ans
def elem_outer_xml(self, elem):
return unicode(elem.toOuterXml())
def bookmark(self):
pos = self.page_position.current_pos
return {'type':'cfi', 'pos':pos}
@property
def at_bottom(self):
return self.height - self.ypos <= self.window_height
@property
def at_top(self):
return self.ypos <=0
def test(self):
pass
@property
def ypos(self):
return self.mainFrame().scrollPosition().y()
@property
def window_height(self):
return self.javascript('window.innerHeight', 'int')
@property
def window_width(self):
return self.javascript('window.innerWidth', 'int')
@property
def xpos(self):
return self.mainFrame().scrollPosition().x()
@dynamic_property
def scroll_fraction(self):
def fget(self):
if self.in_paged_mode:
return self.javascript('''
ans = 0.0;
if (window.paged_display) {
ans = window.paged_display.current_pos();
}
ans;''', typ='float')
else:
try:
return abs(float(self.ypos)/(self.height-self.window_height))
except ZeroDivisionError:
return 0.
def fset(self, val):
if self.in_paged_mode and self.loaded_javascript:
self.javascript('paged_display.scroll_to_pos(%f)'%val)
else:
npos = val * (self.height - self.window_height)
if npos < 0:
npos = 0
self.scroll_to(x=self.xpos, y=npos)
return property(fget=fget, fset=fset)
@property
def hscroll_fraction(self):
try:
return float(self.xpos)/self.width
except ZeroDivisionError:
return 0.
@property
def height(self):
# Note that document.body.offsetHeight does not include top and bottom
# margins on body and in some cases does not include the top margin on
# the first element inside body either. See ticket #8791 for an example
# of the latter.
q = self.mainFrame().contentsSize().height()
if q < 0:
# Don't know if this is still needed, but it can't hurt
j = self.javascript('document.body.offsetHeight', 'int')
if j >= 0:
q = j
return q
@property
def width(self):
return self.mainFrame().contentsSize().width() # offsetWidth gives inaccurate results
def set_bottom_padding(self, amount):
s = QSize(-1, -1) if amount == 0 else QSize(self.viewportSize().width(),
self.height+amount)
self.setPreferredContentsSize(s)
def extract_node(self):
return unicode(self.mainFrame().evaluateJavaScript(
'window.calibre_extract.extract()').toString())
