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Only redraw the screen once every 50ms

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This commit is contained in:
Kovid Goyal 2016-10-20 13:00:44 +05:30
parent 275161e0da
commit 050cf22f24
1 changed files with 45 additions and 35 deletions
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80
kitty/term.py
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@ -58,6 +58,11 @@ class TerminalWidget(QWidget):
t.setSingleShot(True)
t.setInterval(50)
t.timeout.connect(self.do_layout)
self.debounce_update_timer = t = QTimer(self)
t.setSingleShot(True)
t.setInterval(50)
t.timeout.connect(self.do_update_screen)
self.pending_update = QRegion()
def apply_opts(self, opts):
self.opts = opts
@ -100,45 +105,50 @@ class TerminalWidget(QWidget):
def update_screen(self, changes):
self.cursor = changes['cursor'] or self.cursor
if changes['screen']:
self.update()
return
cell_positions, line_positions, cell_width, cell_height = self.cell_positions, self.line_positions, self.cell_width, self.cell_height
old_x, old_y = self.last_drew_cursor_at
rects = []
for lnum in changes['lines']:
try:
rects.append(QRect(cell_positions[0], line_positions[lnum], self.line_width, cell_height))
except IndexError:
continue
old_cursor_added = old_y in changes['lines']
cursor_added = self.cursor.y in changes['lines']
for lnum, ranges in changes['cells'].items():
for start, stop in ranges:
self.pending_update += self.rect()
else:
cell_positions, line_positions, cell_width, cell_height = self.cell_positions, self.line_positions, self.cell_width, self.cell_height
old_x, old_y = self.last_drew_cursor_at
rects = []
for lnum in changes['lines']:
try:
rects.append(QRect(cell_positions[start], line_positions[lnum], cell_width * (stop - start + 1), cell_height))
rects.append(QRect(cell_positions[0], line_positions[lnum], self.line_width, cell_height))
except IndexError:
continue
if not old_cursor_added and old_y == lnum and (start <= old_x <= stop):
old_cursor_added = old_y in changes['lines']
cursor_added = self.cursor.y in changes['lines']
for lnum, ranges in changes['cells'].items():
for start, stop in ranges:
try:
rects.append(QRect(cell_positions[start], line_positions[lnum], cell_width * (stop - start + 1), cell_height))
except IndexError:
continue
if not old_cursor_added and old_y == lnum and (start <= old_x <= stop):
old_cursor_added = True
if not cursor_added and self.cursor.y == lnum and (start <= self.cursor.x <= stop):
cursor_added = True
rects.sort(key=lambda r: (r.y(), r.x()))
for r in rects:
self.pending_update += r
if not cursor_added:
try:
self.pending_update += QRect(cell_positions[self.cursor.x], line_positions[self.cursor.y], cell_width, cell_height)
except IndexError:
pass
if self.cursor.y == old_y and self.cursor.x == old_x:
old_cursor_added = True
if not cursor_added and self.cursor.y == lnum and (start <= self.cursor.x <= stop):
cursor_added = True
rects.sort(key=lambda r: (r.y(), r.x()))
reg = QRegion()
for r in rects:
reg += r
if not cursor_added:
try:
reg += QRect(cell_positions[self.cursor.x], line_positions[self.cursor.y], cell_width, cell_height)
except IndexError:
pass
if self.cursor.y == old_y and self.cursor.x == old_x:
old_cursor_added = True
if not old_cursor_added:
try:
reg += QRect(cell_positions[old_x], line_positions[old_y], cell_width, cell_height)
except IndexError:
pass
self.update(reg)
if not old_cursor_added:
try:
self.pending_update += QRect(cell_positions[old_x], line_positions[old_y], cell_width, cell_height)
except IndexError:
pass
if not self.debounce_update_timer.isActive():
self.debounce_update_timer.start()
def do_update_screen(self):
if not self.pending_update.isEmpty():
self.update(self.pending_update)
self.pending_update = QRegion()
def dirty_cells(self, region: QRegion) -> Iterator[Tuple[int]]:
for rect in region.rects():