forked from openlp/openlp
- improved code readability
- updated docstrings bzr-revno: 1704
This commit is contained in:
Andreas Preikschat
commit
ffbfd1efe9
@ -46,8 +46,6 @@ VERSE = u'The Lord said to {r}Noah{/r}: \n' \
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'r{/pk}{o}e{/o}{pp}n{/pp} of the Lord\n'
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FOOTER = [u'Arky Arky (Unknown)', u'Public Domain', u'CCLI 123456']
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HTML_END = u'</div></body></html>'
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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
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@ -85,7 +83,7 @@ class Renderer(object):
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Updates the render manager's information about the current screen.
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"""
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log.debug(u'Update Display')
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self._calculate_default(self.screens.current[u'size'])
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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, self.imageManager, False)
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@ -163,7 +161,7 @@ class Renderer(object):
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self.theme_data = override_theme
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else:
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self.theme_data = self.themeManager.getThemeData(theme)
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self._calculate_default(self.screens.current[u'size'])
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self._calculate_default()
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self._build_text_rectangle(self.theme_data)
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# if No file do not update cache
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if self.theme_data.background_filename:
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@ -185,7 +183,7 @@ class Renderer(object):
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# save value for use in format_slide
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self.force_page = force_page
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# set the default image size for previews
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self._calculate_default(self.screens.preview[u'size'])
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self._calculate_default()
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# build a service item to generate preview
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serviceItem = ServiceItem()
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serviceItem.theme = theme_data
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@ -203,7 +201,7 @@ class Renderer(object):
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raw_html = serviceItem.get_rendered_frame(0)
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preview = self.display.text(raw_html)
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# Reset the real screen size for subsequent render requests
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self._calculate_default(self.screens.current[u'size'])
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self._calculate_default()
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return preview
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self.force_page = False
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@ -224,7 +222,7 @@ class Renderer(object):
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line_end = u' '
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# Bibles
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if item.is_capable(ItemCapabilities.AllowsWordSplit):
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pages = self._paginate_slide_words(text, line_end)
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pages = self._paginate_slide_words(text.split(u'\n'), line_end)
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else:
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# Clean up line endings.
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lines = self._lines_split(text)
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@ -245,19 +243,16 @@ class Renderer(object):
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new_pages.append(page)
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return new_pages
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def _calculate_default(self, screen):
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def _calculate_default(self):
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"""
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Calculate the default dimentions of the screen.
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``screen``
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The screen to calculate the default of.
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"""
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log.debug(u'_calculate default %s', screen)
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self.width = screen.width()
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self.height = screen.height()
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screen_size = self.screens.current[u'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 = float(self.height) / float(self.width)
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log.debug(u'calculate default %d, %d, %f',
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self.width, self.height, self.screen_ratio)
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log.debug(u'_calculate default %s, %f' % (screen_size,
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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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@ -310,17 +305,28 @@ class Renderer(object):
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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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self.page_shell = u'<!DOCTYPE html><html><head><style>' \
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u'*{margin:0; padding:0; border:0;} '\
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u'#main {position:absolute; top:0px; %s %s}</style></head><body>' \
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u'<div id="main">' % \
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html = u"""<!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(self.theme_data, self.page_width,
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self.page_height), build_lyrics_outline_css(self.theme_data))
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self.web.setHtml(html)
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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
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theme settings.
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**Note:** The smallest possible "unit" of text for a slide is one line.
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If the line is too long it will be cut 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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@ -334,10 +340,8 @@ class Renderer(object):
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previous_raw = u''
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separator = u'<br>'
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html_lines = map(expand_tags, lines)
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html = self.page_shell + separator.join(html_lines) + HTML_END
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self.web.setHtml(html)
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# Text too long so go to next page.
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if self.web_frame.contentsSize().height() > self.page_height:
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if self._text_fits_on_slide(separator.join(html_lines)):
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html_text, previous_raw = self._binary_chop(formatted,
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previous_html, previous_raw, html_lines, lines, separator, u'')
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else:
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@ -347,48 +351,41 @@ class Renderer(object):
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log.debug(u'_paginate_slide - End')
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return formatted
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def _paginate_slide_words(self, text, line_end):
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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
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theme settings. This version is to handle text which needs to be split
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into words to get it to fit.
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theme settings.
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**Note:** The smallest possible "unit" of text for a slide is one word.
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If one line is too long it will be processed word by word. This is
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sometimes need for **bible** verses.
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``text``
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The words to be fitted on the slide split into lines.
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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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This is needed for bibles.
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This is needed for **bibles**.
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"""
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log.debug(u'_paginate_slide_words - Start')
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formatted = []
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previous_html = u''
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previous_raw = u''
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lines = text.split(u'\n')
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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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html = self.page_shell + previous_html + html_line + HTML_END
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self.web.setHtml(html)
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# Text too long so go to next page.
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if self.web_frame.contentsSize().height() > self.page_height:
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if 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
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# it, when it fits on the page.
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if previous_html:
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html = self.page_shell + previous_html + HTML_END
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self.web.setHtml(html)
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if self.web_frame.contentsSize().height() <= \
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self.page_height:
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if not self._text_fits_on_slide(previous_html):
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formatted.append(previous_raw)
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previous_html = u''
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previous_raw = u''
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html = self.page_shell + html_line + HTML_END
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self.web.setHtml(html)
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# Now check if the current verse will fit, if it does
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# not we have to start to process the verse word by
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# word.
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if self.web_frame.contentsSize().height() <= \
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self.page_height:
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if not self._text_fits_on_slide(html_line):
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previous_html = html_line + line_end
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previous_raw = line + line_end
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continue
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@ -445,10 +442,8 @@ class Renderer(object):
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highest_index = len(html_list) - 1
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index = int(highest_index / 2)
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while True:
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html = self.page_shell + previous_html + \
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separator.join(html_list[:index + 1]).strip() + HTML_END
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self.web.setHtml(html)
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if self.web_frame.contentsSize().height() > self.page_height:
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if self._text_fits_on_slide(
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previous_html + separator.join(html_list[:index + 1]).strip()):
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# We know that it does not fit, so change/calculate the
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# new index and highest_index accordingly.
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highest_index = index
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@ -470,10 +465,8 @@ class Renderer(object):
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else:
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continue
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# Check if the remaining elements fit on the slide.
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html = self.page_shell + \
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separator.join(html_list[index + 1:]).strip() + HTML_END
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self.web.setHtml(html)
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if self.web_frame.contentsSize().height() <= self.page_height:
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if not self._text_fits_on_slide(
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separator.join(html_list[index + 1:]).strip()):
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previous_html = separator.join(
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html_list[index + 1:]).strip() + line_end
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previous_raw = separator.join(
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@ -489,6 +482,18 @@ class Renderer(object):
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index = int(highest_index / 2)
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return previous_html, previous_raw
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def _text_fits_on_slide(self, text):
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"""
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Checks if the given ``text`` fits on a slide. If it does ``True`` is
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returned, otherwise ``False``.
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``text``
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The text to check. It can contain HTML tags.
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"""
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self.web_frame.evaluateJavaScript(u'show_text("%s")' %
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text.replace(u'\\', u'\\\\').replace(u'\"', u'\\\"'))
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return self.web_frame.contentsSize().height() > self.page_height
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def _words_split(self, line):
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"""
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Split the slide up by word so can wrap better
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@ -188,7 +188,7 @@ class MainDisplay(QtGui.QGraphicsView):
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while not self.webLoaded:
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Receiver.send_message(u'openlp_process_events')
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self.setGeometry(self.screen[u'size'])
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self.frame.evaluateJavaScript(u'show_text("%s")' % \
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self.frame.evaluateJavaScript(u'show_text("%s")' %
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slide.replace(u'\\', u'\\\\').replace(u'\"', u'\\\"'))
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return self.preview()
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