Python QEventLoop.exec_方法代码示例

# 需要导入模块: from PyQt4.Qt import QEventLoop [as 别名]
# 或者: from PyQt4.Qt.QEventLoop import exec_ [as 别名]
def render_html(path_to_html, width=590, height=750, as_xhtml=True):
    from PyQt4.QtWebKit import QWebPage
    from PyQt4.Qt import QEventLoop, QPalette, Qt, QUrl, QSize
    from calibre.gui2 import is_ok_to_use_qt
    if not is_ok_to_use_qt(): return None
    path_to_html = os.path.abspath(path_to_html)
    with CurrentDir(os.path.dirname(path_to_html)):
        page = QWebPage()
        pal = page.palette()
        pal.setBrush(QPalette.Background, Qt.white)
        page.setPalette(pal)
        page.setViewportSize(QSize(width, height))
        page.mainFrame().setScrollBarPolicy(Qt.Vertical, Qt.ScrollBarAlwaysOff)
        page.mainFrame().setScrollBarPolicy(Qt.Horizontal, Qt.ScrollBarAlwaysOff)
        loop = QEventLoop()
        renderer = HTMLRenderer(page, loop)
        page.loadFinished.connect(renderer, type=Qt.QueuedConnection)
        if as_xhtml:
            page.mainFrame().setContent(open(path_to_html, 'rb').read(),
                    'application/xhtml+xml', QUrl.fromLocalFile(path_to_html))
        else:
            page.mainFrame().load(QUrl.fromLocalFile(path_to_html))
        loop.exec_()
    renderer.loop = renderer.page = None
    page.loadFinished.disconnect()
    del page
    del loop
    if isinstance(renderer.exception, ParserError) and as_xhtml:
        return render_html(path_to_html, width=width, height=height,
                as_xhtml=False)
    return renderer

# 需要导入模块: from PyQt4.Qt import QEventLoop [as 别名]
# 或者: from PyQt4.Qt.QEventLoop import exec_ [as 别名]
class PDFWriter(QObject):  # {{{
    def __init__(self, opts, log, cover_data=None, toc=None):
        from calibre.gui2 import is_ok_to_use_qt
        from calibre.utils.podofo import get_podofo

        if not is_ok_to_use_qt():
            raise Exception("Not OK to use Qt")
        QObject.__init__(self)

        self.logger = self.log = log
        self.podofo = get_podofo()
        self.doc = self.podofo.PDFDoc()

        self.loop = QEventLoop()
        self.view = QWebView()
        self.page = Page(opts, self.log)
        self.view.setPage(self.page)
        self.view.setRenderHints(QPainter.Antialiasing | QPainter.TextAntialiasing | QPainter.SmoothPixmapTransform)
        self.view.loadFinished.connect(self._render_html, type=Qt.QueuedConnection)
        for x in (Qt.Horizontal, Qt.Vertical):
            self.view.page().mainFrame().setScrollBarPolicy(x, Qt.ScrollBarAlwaysOff)
        self.render_queue = []
        self.combine_queue = []
        self.tmp_path = PersistentTemporaryDirectory(u"_pdf_output_parts")

        self.opts = opts
        self.cover_data = cover_data
        self.paged_js = None
        self.toc = toc

    def dump(self, items, out_stream, pdf_metadata):
        self.metadata = pdf_metadata
        self._delete_tmpdir()
        self.outline = Outline(self.toc, items)

        self.render_queue = items
        self.combine_queue = []
        self.out_stream = out_stream
        self.insert_cover()

        self.render_succeeded = False
        self.current_page_num = self.doc.page_count()
        self.combine_queue.append(os.path.join(self.tmp_path, "qprinter_out.pdf"))
        self.first_page = True
        self.setup_printer(self.combine_queue[-1])
        QTimer.singleShot(0, self._render_book)
        self.loop.exec_()
        if self.painter is not None:
            self.painter.end()
        if self.printer is not None:
            self.printer.abort()

        if not self.render_succeeded:
            raise Exception("Rendering HTML to PDF failed")

    def _render_book(self):
        try:
            if len(self.render_queue) == 0:
                self._write()
            else:
                self._render_next()
        except:
            self.logger.exception("Rendering failed")
            self.loop.exit(1)

    def _render_next(self):
        item = unicode(self.render_queue.pop(0))

        self.logger.debug("Processing %s..." % item)
        self.current_item = item
        load_html(item, self.view)

    def _render_html(self, ok):
        if ok:
            self.do_paged_render()
        else:
            # The document is so corrupt that we can't render the page.
            self.logger.error("Document cannot be rendered.")
            self.loop.exit(0)
            return
        self._render_book()

    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 setup_printer(self, outpath):
        self.printer = self.painter = None
        printer = get_pdf_printer(self.opts, output_file_name=outpath)
        painter = QPainter(printer)
        zoomx = printer.logicalDpiX() / self.view.logicalDpiX()
        zoomy = printer.logicalDpiY() / self.view.logicalDpiY()
        painter.scale(zoomx, zoomy)
        pr = printer.pageRect()
        self.printer, self.painter = printer, painter
#.........这里部分代码省略.........

# 需要导入模块: from PyQt4.Qt import QEventLoop [as 别名]
# 或者: from PyQt4.Qt.QEventLoop import exec_ [as 别名]
class StatsCollector(object):

    def __init__(self, container, do_embed=False):
        self.container = container
        self.log = self.logger = container.log
        self.do_embed = do_embed
        must_use_qt()
        self.parser = CSSParser(loglevel=logging.CRITICAL, log=logging.getLogger('calibre.css'))

        self.loop = QEventLoop()
        self.view = QWebView()
        self.page = Page(self.log)
        self.view.setPage(self.page)
        self.page.setViewportSize(QSize(1200, 1600))

        self.view.loadFinished.connect(self.collect,
                type=Qt.QueuedConnection)

        self.render_queue = list(container.spine_items)
        self.font_stats = {}
        self.font_usage_map = {}
        self.font_spec_map = {}
        self.font_rule_map = {}
        self.all_font_rules = {}

        QTimer.singleShot(0, self.render_book)

        if self.loop.exec_() == 1:
            raise Exception('Failed to gather statistics from book, see log for details')

    def render_book(self):
        try:
            if not self.render_queue:
                self.loop.exit()
            else:
                self.render_next()
        except:
            self.logger.exception('Rendering failed')
            self.loop.exit(1)

    def render_next(self):
        item = unicode(self.render_queue.pop(0))
        self.current_item = item
        load_html(item, self.view)

    def collect(self, ok):
        if not ok:
            self.log.error('Failed to render document: %s'%self.container.relpath(self.current_item))
            self.loop.exit(1)
            return
        try:
            self.page.load_js()
            self.collect_font_stats()
        except:
            self.log.exception('Failed to collect font stats from: %s'%self.container.relpath(self.current_item))
            self.loop.exit(1)
            return

        self.render_book()

    def href_to_name(self, href, warn_name):
        if not href.startswith('file://'):
            self.log.warn('Non-local URI in', warn_name, ':', href, 'ignoring')
            return None
        src = href[len('file://'):]
        if iswindows and len(src) > 2 and (src[0], src[2]) == ('/', ':'):
            src = src[1:]
        src = src.replace('/', os.sep)
        src = unquote(src)
        name = self.container.abspath_to_name(src)
        if not self.container.has_name(name):
            self.log.warn('Missing resource', href, 'in', warn_name,
                          'ignoring')
            return None
        return name

    def collect_font_stats(self):
        self.page.evaljs('window.font_stats.get_font_face_rules()')
        font_face_rules = self.page.bridge_value
        if not isinstance(font_face_rules, list):
            raise Exception('Unknown error occurred while reading font-face rules')

        # Weed out invalid font-face rules
        rules = []
        for rule in font_face_rules:
            ff = rule.get('font-family', None)
            if not ff:
                continue
            style = self.parser.parseStyle('font-family:%s'%ff, validate=False)
            ff = [x.value for x in
                  style.getProperty('font-family').propertyValue]
            if not ff or ff[0] == 'inherit':
                continue
            rule['font-family'] = frozenset(icu_lower(f) for f in ff)
            src = rule.get('src', None)
            if not src:
                continue
            if src.startswith('url(') and src.endswith(')') and src[4] not in {'"', "'"}:
                # Quote the url otherwise cssutils fails to parse it if it has
                # ' or " in it
#.........这里部分代码省略.........

# 需要导入模块: from PyQt4.Qt import QEventLoop [as 别名]
# 或者: from PyQt4.Qt.QEventLoop import exec_ [as 别名]
class StatsCollector(object):
    def __init__(self, container, do_embed=False):
        self.container = container
        self.log = self.logger = container.log
        self.do_embed = do_embed
        must_use_qt()
        self.parser = CSSParser(loglevel=logging.CRITICAL, log=logging.getLogger("calibre.css"))

        self.loop = QEventLoop()
        self.view = QWebView()
        self.page = Page(self.log)
        self.view.setPage(self.page)
        self.page.setViewportSize(QSize(1200, 1600))

        self.view.loadFinished.connect(self.collect, type=Qt.QueuedConnection)

        self.render_queue = list(container.spine_items)
        self.font_stats = {}
        self.font_usage_map = {}
        self.font_spec_map = {}
        self.font_rule_map = {}
        self.all_font_rules = {}

        QTimer.singleShot(0, self.render_book)

        if self.loop.exec_() == 1:
            raise Exception("Failed to gather statistics from book, see log for details")

    def render_book(self):
        try:
            if not self.render_queue:
                self.loop.exit()
            else:
                self.render_next()
        except:
            self.logger.exception("Rendering failed")
            self.loop.exit(1)

    def render_next(self):
        item = unicode(self.render_queue.pop(0))
        self.current_item = item
        load_html(item, self.view)

    def collect(self, ok):
        if not ok:
            self.log.error("Failed to render document: %s" % self.container.relpath(self.current_item))
            self.loop.exit(1)
            return
        try:
            self.page.load_js()
            self.collect_font_stats()
        except:
            self.log.exception("Failed to collect font stats from: %s" % self.container.relpath(self.current_item))
            self.loop.exit(1)
            return

        self.render_book()

    def href_to_name(self, href, warn_name):
        if not href.startswith("file://"):
            self.log.warn("Non-local URI in", warn_name, ":", href, "ignoring")
            return None
        src = href[len("file://") :]
        if iswindows and len(src) > 2 and (src[0], src[2]) == ("/", ":"):
            src = src[1:]
        src = src.replace("/", os.sep)
        src = unquote(src)
        name = self.container.abspath_to_name(src)
        if not self.container.has_name(name):
            self.log.warn("Missing resource", href, "in", warn_name, "ignoring")
            return None
        return name

    def collect_font_stats(self):
        self.page.evaljs("window.font_stats.get_font_face_rules()")
        font_face_rules = self.page.bridge_value
        if not isinstance(font_face_rules, list):
            raise Exception("Unknown error occurred while reading font-face rules")

        # Weed out invalid font-face rules
        rules = []
        for rule in font_face_rules:
            ff = rule.get("font-family", None)
            if not ff:
                continue
            style = self.parser.parseStyle("font-family:%s" % ff, validate=False)
            ff = [x.value for x in style.getProperty("font-family").propertyValue]
            if not ff or ff[0] == "inherit":
                continue
            rule["font-family"] = frozenset(icu_lower(f) for f in ff)
            src = rule.get("src", None)
            if not src:
                continue
            style = self.parser.parseStyle("background-image:%s" % src, validate=False)
            src = style.getProperty("background-image").propertyValue[0].uri
            name = self.href_to_name(src, "@font-face rule")
            if name is None:
                continue
            rule["src"] = name
            normalize_font_properties(rule)
#.........这里部分代码省略.........

# 需要导入模块: from PyQt4.Qt import QEventLoop [as 别名]
# 或者: from PyQt4.Qt.QEventLoop import exec_ [as 别名]

#.........这里部分代码省略.........
            opts.margin_bottom = min_margin
        if self.header and opts.margin_top < min_margin:
            self.log.warn('Top margin is too small for header, increasing it.')
            opts.margin_top = min_margin

        self.page.setViewportSize(QSize(self.doc.width(), self.doc.height()))
        self.render_queue = items
        self.total_items = len(items)

        mt, mb = map(self.doc.to_px, (opts.margin_top, opts.margin_bottom))
        self.margin_top, self.margin_bottom = map(lambda x:int(floor(x)), (mt, mb))

        self.painter = QPainter(self.doc)
        self.doc.set_metadata(title=pdf_metadata.title,
                              author=pdf_metadata.author,
                              tags=pdf_metadata.tags)
        self.doc_title = pdf_metadata.title
        self.doc_author = pdf_metadata.author
        self.painter.save()
        try:
            if self.cover_data is not None:
                p = QPixmap()
                p.loadFromData(self.cover_data)
                if not p.isNull():
                    self.doc.init_page()
                    draw_image_page(QRect(*self.doc.full_page_rect),
                            self.painter, p,
                            preserve_aspect_ratio=self.opts.preserve_cover_aspect_ratio)
                    self.doc.end_page()
        finally:
            self.painter.restore()

        QTimer.singleShot(0, self.render_book)
        if self.loop.exec_() == 1:
            raise Exception('PDF Output failed, see log for details')

        if self.toc is not None and len(self.toc) > 0:
            self.doc.add_outline(self.toc)

        self.painter.end()

        if self.doc.errors_occurred:
            raise Exception('PDF Output failed, see log for details')

    def render_book(self):
        if self.doc.errors_occurred:
            return self.loop.exit(1)
        try:
            if not self.render_queue:
                self.loop.exit()
            else:
                self.render_next()
        except:
            self.logger.exception('Rendering failed')
            self.loop.exit(1)

    def render_next(self):
        item = unicode(self.render_queue.pop(0))

        self.logger.debug('Processing %s...' % item)
        self.current_item = item
        load_html(item, self.view)

    def render_html(self, ok):
        if ok:
            try:

# 需要导入模块: from PyQt4.Qt import QEventLoop [as 别名]
# 或者: from PyQt4.Qt.QEventLoop import exec_ [as 别名]
class PDFWriter(QObject): # {{{

    def __init__(self, opts, log, cover_data=None):
        from calibre.gui2 import is_ok_to_use_qt
        if not is_ok_to_use_qt():
            raise Exception('Not OK to use Qt')
        QObject.__init__(self)

        self.logger = log

        self.loop = QEventLoop()
        self.view = QWebView()
        self.view.setRenderHints(QPainter.Antialiasing|QPainter.TextAntialiasing|QPainter.SmoothPixmapTransform)
        self.view.loadFinished.connect(self._render_html,
                type=Qt.QueuedConnection)
        for x in (Qt.Horizontal, Qt.Vertical):
            self.view.page().mainFrame().setScrollBarPolicy(x,
                    Qt.ScrollBarAlwaysOff)
        self.render_queue = []
        self.combine_queue = []
        self.tmp_path = PersistentTemporaryDirectory(u'_pdf_output_parts')

        self.opts = opts
        self.cover_data = cover_data
        self.paged_js = None

    def dump(self, items, out_stream, pdf_metadata):
        self.metadata = pdf_metadata
        self._delete_tmpdir()

        self.render_queue = items
        self.combine_queue = []
        self.out_stream = out_stream

        QMetaObject.invokeMethod(self, "_render_book", Qt.QueuedConnection)
        self.loop.exec_()


    @QtCore.pyqtSignature('_render_book()')
    def _render_book(self):
        if len(self.render_queue) == 0:
            self._write()
        else:
            self._render_next()

    def _render_next(self):
        item = unicode(self.render_queue.pop(0))
        self.combine_queue.append(os.path.join(self.tmp_path, '%i.pdf' % (len(self.combine_queue) + 1)))

        self.logger.debug('Processing %s...' % item)
        load_html(item, self.view)

    def _render_html(self, ok):
        if ok:
            item_path = os.path.join(self.tmp_path, '%i.pdf' % len(self.combine_queue))
            self.logger.debug('\tRendering item %s as %i.pdf' % (os.path.basename(str(self.view.url().toLocalFile())), len(self.combine_queue)))
            self.do_paged_render(item_path)
        else:
            # The document is so corrupt that we can't render the page.
            self.loop.exit(0)
            raise Exception('Document cannot be rendered.')
        self._render_book()

    def do_paged_render(self, outpath):
        from PyQt4.Qt import QSize, QPainter
        if self.paged_js is None:
            from calibre.utils.resources import compiled_coffeescript
            self.paged_js = compiled_coffeescript('ebooks.oeb.display.utils')
            self.paged_js += compiled_coffeescript('ebooks.oeb.display.paged')
        printer = get_pdf_printer(self.opts, output_file_name=outpath)
        painter = QPainter(printer)
        zoomx = printer.logicalDpiX()/self.view.logicalDpiX()
        zoomy = printer.logicalDpiY()/self.view.logicalDpiY()
        painter.scale(zoomx, zoomy)

        pr = printer.pageRect()
        evaljs = self.view.page().mainFrame().evaluateJavaScript
        evaljs(self.paged_js)
        self.view.page().setViewportSize(QSize(pr.width()/zoomx,
            pr.height()/zoomy))
        evaljs('''
        document.body.style.backgroundColor = "white";
        paged_display.set_geometry(1, 0, 0, 0);
        paged_display.layout();
        paged_display.fit_images();
        ''')
        mf = self.view.page().mainFrame()
        while True:
            mf.render(painter)
            nsl = evaljs('paged_display.next_screen_location()').toInt()
            if not nsl[1] or nsl[0] <= 0: break
            evaljs('window.scrollTo(%d, 0)'%nsl[0])
            printer.newPage()

        painter.end()
        printer.abort()

    def _delete_tmpdir(self):
        if os.path.exists(self.tmp_path):
            shutil.rmtree(self.tmp_path, True)
#.........这里部分代码省略.........

# 需要导入模块: from PyQt4.Qt import QEventLoop [as 别名]
# 或者: from PyQt4.Qt.QEventLoop import exec_ [as 别名]
class StatsCollector(object):

    def __init__(self, container):
        self.container = container
        self.log = self.logger = container.log
        must_use_qt()

        self.loop = QEventLoop()
        self.view = QWebView()
        self.page = Page(self.log)
        self.view.setPage(self.page)
        self.page.setViewportSize(QSize(1200, 1600))

        self.view.loadFinished.connect(self.collect,
                type=Qt.QueuedConnection)

        self.render_queue = list(container.spine_items)
        self.font_stats = {}

        QTimer.singleShot(0, self.render_book)

        if self.loop.exec_() == 1:
            raise Exception('Failed to gather statistics from book, see log for details')

    def render_book(self):
        try:
            if not self.render_queue:
                self.loop.exit()
            else:
                self.render_next()
        except:
            self.logger.exception('Rendering failed')
            self.loop.exit(1)

    def render_next(self):
        item = unicode(self.render_queue.pop(0))
        self.current_item = item
        load_html(item, self.view)

    def collect(self, ok):
        if not ok:
            self.log.error('Failed to render document: %s'%self.container.relpath(self.current_item))
            self.loop.exit(1)
            return
        try:
            self.page.load_js()
            self.collect_font_stats()
        except:
            self.log.exception('Failed to collect font stats from: %s'%self.container.relpath(self.current_item))
            self.loop.exit(1)
            return

        self.render_book()

    def collect_font_stats(self):
        self.page.evaljs('window.font_stats.get_font_face_rules()')
        font_face_rules = self.page.bridge_value
        if not isinstance(font_face_rules, list):
            raise Exception('Unknown error occurred while reading font-face rules')

        # Weed out invalid font-face rules
        rules = []
        for rule in font_face_rules:
            ff = rule.get('font-family', None)
            if not ff: continue
            style = parseStyle('font-family:%s'%ff, validate=False)
            ff = [x.value for x in
                  style.getProperty('font-family').propertyValue]
            if not ff or ff[0] == 'inherit':
                continue
            rule['font-family'] = frozenset(icu_lower(f) for f in ff)
            src = rule.get('src', None)
            if not src: continue
            style = parseStyle('background-image:%s'%src, validate=False)
            src = style.getProperty('background-image').propertyValue[0].uri
            if not src.startswith('file://'):
                self.log.warn('Unknown URI in @font-face: %r'%src)
                continue
            src = src[len('file://'):]
            if iswindows and src.startswith('/'):
                src = src[1:]
            src = src.replace('/', os.sep)
            src = unquote(src)
            name = self.container.abspath_to_name(src)
            if not self.container.has_name(name):
                self.log.warn('Font %r referenced in @font-face rule not found'
                              %name)
                continue
            rule['src'] = name
            normalize_font_properties(rule)
            rule['width'] = widths[rule['font-stretch']]
            rule['weight'] = int(rule['font-weight'])
            rules.append(rule)

        if not rules:
            return

        for rule in rules:
            if rule['src'] not in self.font_stats:
                self.font_stats[rule['src']] = set()
#.........这里部分代码省略.........