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view.py
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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Copyright (C) 2018 Andy Stewart
#
# Author: Andy Stewart <lazycat.manatee@gmail.com>
# Maintainer: Andy Stewart <lazycat.manatee@gmail.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from PyQt6.QtCore import Qt, QEvent, QPoint
from PyQt6.QtGui import QPainter, QWindow, QBrush
from PyQt6.QtWidgets import QWidget, QVBoxLayout, QGraphicsView, QFrame
from core.utils import eval_in_emacs, focus_emacs_buffer, get_emacs_func_cache_result, hyprland_window_move, current_desktop
class View(QWidget):
def __init__(self, buffer, view_info):
super(View, self).__init__()
self.buffer = buffer
# Init widget attributes.
if get_emacs_func_cache_result("eaf-emacs-running-in-wayland-native", []):
self.setWindowFlags(Qt.WindowType.FramelessWindowHint | Qt.WindowType.WindowStaysOnTopHint | Qt.WindowType.WindowOverridesSystemGestures | Qt.WindowType.BypassWindowManagerHint)
elif get_emacs_func_cache_result("eaf-emacs-not-use-reparent-technology", []):
self.setWindowFlags(Qt.WindowType.FramelessWindowHint | Qt.WindowType.WindowStaysOnTopHint | Qt.WindowType.NoDropShadowWindowHint)
else:
self.setWindowFlags(Qt.WindowType.FramelessWindowHint)
self.setAttribute(Qt.WidgetAttribute.WA_X11DoNotAcceptFocus, True)
self.setContentsMargins(0, 0, 0, 0)
self.installEventFilter(self)
# Init attributes.
self.view_info = view_info
(self.buffer_id, self.emacs_xid, self.x, self.y, self.width, self.height) = view_info.split(":")
self.x: int = int(self.x)
self.y: int = int(self.y)
self.width: int = int(self.width)
self.height: int = int(self.height)
# Build QGraphicsView.
self.layout: QVBoxLayout = QVBoxLayout(self)
self.layout.setSpacing(0)
self.layout.setContentsMargins(0, 0, 0, 0)
self.graphics_view = QGraphicsView(buffer, self)
# Remove border from QGraphicsView.
self.graphics_view.setHorizontalScrollBarPolicy(Qt.ScrollBarPolicy.ScrollBarAlwaysOff)
self.graphics_view.setVerticalScrollBarPolicy(Qt.ScrollBarPolicy.ScrollBarAlwaysOff)
self.graphics_view.setRenderHints(QPainter.RenderHint.Antialiasing | QPainter.RenderHint.SmoothPixmapTransform | QPainter.RenderHint.TextAntialiasing)
self.graphics_view.setFrameStyle(QFrame.Shape.NoFrame)
# Fill background color.
self.graphics_view.setBackgroundBrush(QBrush(buffer.background_color))
# Add graphics view.
self.layout.addWidget(self.graphics_view)
# NOTE: show function must start before resize to trigger *first* resizeEvent after show.
self.show()
# Resize after show to trigger fit view operation.
self.resize(self.width, self.height)
self.buffer.aspect_ratio_change.connect(self.adjust_aspect_ratio)
def resizeEvent(self, event):
# Fit content to view rect just when buffer fit_to_view option is enable.
if self.buffer.fit_to_view:
if event.oldSize().isValid():
self.graphics_view.fitInView(self.graphics_view.scene().sceneRect(), Qt.AspectRatioMode.KeepAspectRatio)
QWidget.resizeEvent(self, event)
def adjust_aspect_ratio(self):
widget_width = self.width
widget_height = self.height
if self.buffer.aspect_ratio == 0:
self.buffer.buffer_widget.resize(self.width, self.height)
self.layout.setContentsMargins(0, 0, 0, 0)
else:
view_height = widget_height * (1 - 2 * self.buffer.vertical_padding_ratio)
view_width = view_height * self.buffer.aspect_ratio
horizontal_padding = (widget_width - view_width) / 2
vertical_padding = self.buffer.vertical_padding_ratio * widget_height
self.buffer.buffer_widget.resize(int(view_width), int(view_height))
self.layout.setContentsMargins(int(horizontal_padding), int(vertical_padding), int(horizontal_padding), int(vertical_padding))
def eventFilter(self, obj, event):
# import time
# print(time.time(), event.type())
import platform
if current_desktop == "Hyprland" and event.type() in [QEvent.Type.Enter]:
hyprland_window_move(self.x, self.y)
if event.type() in [QEvent.Type.ShortcutOverride]:
eval_in_emacs('eaf-activate-emacs-window', [self.buffer_id])
# Focus emacs buffer when user click view.
event_type = [QEvent.Type.MouseButtonPress, QEvent.Type.MouseButtonRelease, QEvent.Type.MouseButtonDblClick]
if platform.system() != "Darwin":
event_type += [QEvent.Type.Wheel]
if event.type() in event_type:
focus_emacs_buffer(self.buffer_id)
# Stop mouse event.
return True
return False
def showEvent(self, event):
# NOTE: we must reparent after widget show, otherwise reparent operation maybe failed.
import platform
self.reparent()
if platform.system() in ["Windows", "Darwin"]:
eval_in_emacs('eaf-activate-emacs-window', [])
# Make graphics view at left-top corner after show.
self.graphics_view.verticalScrollBar().setValue(0)
self.graphics_view.horizontalScrollBar().setValue(0)
def reparent(self):
# print("Reparent: ", self.buffer.url)
qwindow = self.windowHandle()
if not get_emacs_func_cache_result("eaf-emacs-not-use-reparent-technology", []):
qwindow.setParent(QWindow.fromWinId(int(self.emacs_xid))) # type: ignore
qwindow.setPosition(QPoint(self.x, self.y))
def try_show_top_view(self):
if get_emacs_func_cache_result("eaf-emacs-not-use-reparent-technology", []):
self.setWindowFlag(Qt.WindowType.WindowStaysOnTopHint, True)
self.show()
def try_hide_top_view(self):
if get_emacs_func_cache_result("eaf-emacs-not-use-reparent-technology", []):
self.setWindowFlag(Qt.WindowType.WindowStaysOnTopHint, False)
self.hide()
def destroy_view(self):
# print("Destroy: ", self.buffer.url)
self.destroy()
def screen_shot(self):
return self.grab()