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Live CSS: Prevent unnecessary refreshes when simply moving the cursor around in the same tag

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Kovid Goyal 2014-05-22 21:36:11 +05:30
parent 5c7ff48e9f
commit 1038c66066
1 changed files with 5 additions and 1 deletions
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4
src/calibre/gui2/tweak_book/live_css.py
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@ -298,6 +298,7 @@ class LiveCSS(QWidget):
QWidget.__init__(self, parent) QWidget.__init__(self, parent)
self.preview = preview self.preview = preview
self.preview_is_refreshing = False self.preview_is_refreshing = False
self.refresh_needed = False
preview.refresh_starting.connect(self.preview_refresh_starting) preview.refresh_starting.connect(self.preview_refresh_starting)
preview.refreshed.connect(self.preview_refreshed) preview.refreshed.connect(self.preview_refreshed)
self.apply_theme() self.apply_theme()
@ -333,6 +334,7 @@ class LiveCSS(QWidget):
self.preview_is_refreshing = False self.preview_is_refreshing = False
# We must let the event loop run otherwise the webview will return # We must let the event loop run otherwise the webview will return
# stale data in read_data() # stale data in read_data()
self.refresh_needed = True
self.start_update_timer() self.start_update_timer()
def apply_theme(self): def apply_theme(self):
@ -382,6 +384,7 @@ class LiveCSS(QWidget):
self.now_showing = (editor_name, sourceline, tags) self.now_showing = (editor_name, sourceline, tags)
data['html_name'] = editor_name data['html_name'] = editor_name
self.box.show_data(data) self.box.show_data(data)
self.refresh_needed = False
self.stack.setCurrentIndex(1) self.stack.setCurrentIndex(1)
def read_data(self, sourceline, tags): def read_data(self, sourceline, tags):
@ -428,6 +431,7 @@ class LiveCSS(QWidget):
return QTimer.singleShot(100, self.update_data) return QTimer.singleShot(100, self.update_data)
if ed is not None: if ed is not None:
sourceline, tags = ed.current_tag() sourceline, tags = ed.current_tag()
if self.refresh_needed or self.now_showing != (editor_name, sourceline, tags):
self.show_data(editor_name, sourceline, tags) self.show_data(editor_name, sourceline, tags)
def start_update_timer(self): def start_update_timer(self):