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# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
from typing import List
from PySide6.QtCore import (QByteArray, QEvent, QObject, QPoint, Qt, QTimer,
QXmlStreamReader, Slot)
from PySide6.QtGui import QPalette
from PySide6.QtNetwork import (QNetworkAccessManager, QNetworkReply,
QNetworkRequest)
from PySide6.QtWidgets import QFrame, QTreeWidget, QTreeWidgetItem
class GSuggestCompletion(QObject):
def __init__(self, parent=None):
super().__init__(parent)
self.editor = parent
self.popup = QTreeWidget()
self.popup.setWindowFlags(Qt.Popup)
self.popup.setFocusPolicy(Qt.NoFocus)
self.popup.setFocusProxy(parent)
self.popup.setMouseTracking(True)
self.popup.setColumnCount(1)
self.popup.setUniformRowHeights(True)
self.popup.setRootIsDecorated(False)
self.popup.setEditTriggers(QTreeWidget.NoEditTriggers)
self.popup.setSelectionBehavior(QTreeWidget.SelectRows)
self.popup.setFrameStyle(QFrame.Box | QFrame.Plain)
self.popup.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.popup.header().hide()
self.popup.installEventFilter(self)
self.popup.itemClicked.connect(self.done_completion)
self.timer = QTimer()
self.timer.setSingleShot(True)
self.timer.setInterval(500)
self.timer.timeout.connect(self.auto_suggest)
self.editor.textEdited.connect(self.timer.start)
self.network_manager = QNetworkAccessManager()
self.network_manager.finished.connect(self.handle_network_data)
def eventFilter(self, obj: QObject, ev: QEvent):
if obj is not self.popup:
return False
if ev.type() == QEvent.MouseButtonPress:
self.popup.hide()
self.editor.setFocus()
return True
if ev.type() == QEvent.KeyPress:
consumed = False
key = ev.key()
if key in (Qt.Key_Enter, Qt.Key_Return):
self.done_completion()
consumed = True
elif key == Qt.Key_Escape:
self.editor.setFocus()
self.popup.hide()
consumed = True
elif key in (
Qt.Key_Up,
Qt.Key_Down,
Qt.Key_Home,
Qt.Key_End,
Qt.Key_PageUp,
Qt.Key_PageDown,
):
pass
else:
self.editor.setFocus()
self.editor.event(ev)
self.popup.hide()
return consumed
return False
def show_completion(self, choices: List[str]):
if not choices:
return
pal = self.editor.palette()
color = pal.color(QPalette.Disabled, QPalette.WindowText)
self.popup.setUpdatesEnabled(False)
self.popup.clear()
for choice in choices:
item = QTreeWidgetItem(self.popup)
item.setText(0, choice)
item.setForeground(0, color)
self.popup.setCurrentItem(self.popup.topLevelItem(0))
self.popup.resizeColumnToContents(0)
self.popup.setUpdatesEnabled(True)
self.popup.move(self.editor.mapToGlobal(QPoint(0, self.editor.height())))
self.popup.setFocus()
self.popup.show()
@Slot()
def done_completion(self):
self.timer.stop()
self.popup.hide()
self.editor.setFocus()
item = self.popup.currentItem()
if item:
self.editor.setText(item.text(0))
self.editor.returnPressed.emit()
@Slot()
def auto_suggest(self):
s = self.editor.text()
url = f"https://google.com/complete/search?output=toolbar&q={s}"
self.network_manager.get(QNetworkRequest(url))
def prevent_suggest(self):
self.timer.stop()
@Slot()
def handle_network_data(self, network_reply: QNetworkReply):
url = network_reply.url()
if network_reply.error() == QNetworkReply.NoError:
choices: List[str] = []
response: QByteArray = network_reply.readAll()
xml = QXmlStreamReader(response)
while not xml.atEnd():
xml.readNext()
if xml.tokenType() == QXmlStreamReader.StartElement:
if xml.name() == "suggestion":
s = xml.attributes().value("data")
choices.append(s)
self.show_completion(choices)
network_reply.deleteLater()
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