- trying to improve the performance of View CNC Code command by using QPlainTextEdit; made the mods for it

- when using the Find function in the TextEditor and the result reach the bottom of the document, the next find will be the first in the document (before it defaulted to the beginning of the document)

flatcamGUI/GUIElements.py

@@ -884,6 +884,178 @@ class FCTextAreaExtended(QtWidgets.QTextEdit):
         self.setTextCursor(cursor)
 
 
+class FCPlainTextAreaExtended(QtWidgets.QPlainTextEdit):
+    def __init__(self, parent=None):
+        super().__init__(parent)
+
+        self.completer = MyCompleter()
+
+        self.model = QtCore.QStringListModel()
+        self.completer.setModel(self.model)
+        self.set_model_data(keyword_list=[])
+        self.completer.insertText.connect(self.insertCompletion)
+
+        self.completer_enable = False
+
+    def append(self, text):
+        """
+        Added this to make this subclass compatible with FCTextAreaExtended
+        :param text: string
+        :return:
+        """
+        self.appendPlainText(text)
+
+    def set_model_data(self, keyword_list):
+        self.model.setStringList(keyword_list)
+
+    def insertCompletion(self, completion):
+        tc = self.textCursor()
+        extra = (len(completion) - len(self.completer.completionPrefix()))
+
+        # don't insert if the word is finished but add a space instead
+        if extra == 0:
+            tc.insertText(' ')
+            self.completer.popup().hide()
+            return
+
+        tc.movePosition(QTextCursor.Left)
+        tc.movePosition(QTextCursor.EndOfWord)
+        tc.insertText(completion[-extra:])
+        # add a space after inserting the word
+        tc.insertText(' ')
+        self.setTextCursor(tc)
+        self.completer.popup().hide()
+
+    def focusInEvent(self, event):
+        if self.completer:
+            self.completer.setWidget(self)
+        QtWidgets.QPlainTextEdit.focusInEvent(self, event)
+
+    def set_value(self, val):
+        self.setPlainText(val)
+
+    def get_value(self):
+        self.toPlainText()
+
+    def insertFromMimeData(self, data):
+        """
+        Reimplemented such that when SHIFT is pressed and doing click Paste in the contextual menu, the '\' symbol
+        is replaced with the '/' symbol. That's because of the difference in path separators in Windows and TCL
+        :param data:
+        :return:
+        """
+        modifier = QtWidgets.QApplication.keyboardModifiers()
+        if modifier == Qt.ShiftModifier:
+            text = data.text()
+            text = text.replace('\\', '/')
+            self.insertPlainText(text)
+        else:
+            self.insertPlainText(data.text())
+
+    def keyPressEvent(self, event):
+        """
+        Reimplemented so the CTRL + SHIFT + V shortcut key combo will paste the text but replacing '\' with '/'
+        :param event:
+        :return:
+        """
+        key = event.key()
+        modifier = QtWidgets.QApplication.keyboardModifiers()
+
+        if modifier & Qt.ControlModifier and modifier & Qt.ShiftModifier:
+            if key == QtCore.Qt.Key_V:
+                clipboard = QtWidgets.QApplication.clipboard()
+                clip_text = clipboard.text()
+                clip_text = clip_text.replace('\\', '/')
+                self.insertPlainText(clip_text)
+
+        if modifier & Qt.ControlModifier and key == Qt.Key_Slash:
+            self.comment()
+
+        tc = self.textCursor()
+        if (key == Qt.Key_Tab or key == Qt.Key_Enter or key == Qt.Key_Return) and self.completer.popup().isVisible():
+            self.completer.insertText.emit(self.completer.getSelected())
+            self.completer.setCompletionMode(QCompleter.PopupCompletion)
+            return
+        elif key == Qt.Key_BraceLeft:
+            tc.insertText('{}')
+            self.moveCursor(QtGui.QTextCursor.Left)
+        elif key == Qt.Key_BracketLeft:
+            tc.insertText('[]')
+            self.moveCursor(QtGui.QTextCursor.Left)
+        elif key == Qt.Key_ParenLeft:
+            tc.insertText('()')
+            self.moveCursor(QtGui.QTextCursor.Left)
+
+        elif key == Qt.Key_BraceRight:
+            tc.select(QtGui.QTextCursor.WordUnderCursor)
+            if tc.selectedText() == '}':
+                tc.movePosition(QTextCursor.Right)
+                self.setTextCursor(tc)
+            else:
+                tc.clearSelection()
+                self.textCursor().insertText('}')
+        elif key == Qt.Key_BracketRight:
+            tc.select(QtGui.QTextCursor.WordUnderCursor)
+            if tc.selectedText() == ']':
+                tc.movePosition(QTextCursor.Right)
+                self.setTextCursor(tc)
+            else:
+                tc.clearSelection()
+                self.textCursor().insertText(']')
+        elif key == Qt.Key_ParenRight:
+            tc.select(QtGui.QTextCursor.WordUnderCursor)
+            if tc.selectedText() == ')':
+                tc.movePosition(QTextCursor.Right)
+                self.setTextCursor(tc)
+            else:
+                tc.clearSelection()
+                self.textCursor().insertText(')')
+        else:
+            super(FCPlainTextAreaExtended, self).keyPressEvent(event)
+
+        if self.completer_enable:
+            tc.select(QTextCursor.WordUnderCursor)
+            cr = self.cursorRect()
+
+            if len(tc.selectedText()) > 0:
+                self.completer.setCompletionPrefix(tc.selectedText())
+                popup = self.completer.popup()
+                popup.setCurrentIndex(self.completer.completionModel().index(0, 0))
+
+                cr.setWidth(self.completer.popup().sizeHintForColumn(0)
+                            + self.completer.popup().verticalScrollBar().sizeHint().width())
+                self.completer.complete(cr)
+            else:
+                self.completer.popup().hide()
+
+    def comment(self):
+        """
+        Got it from here:
+        https://stackoverflow.com/questions/49898820/how-to-get-text-next-to-cursor-in-qtextedit-in-pyqt4
+        :return:
+        """
+        pos = self.textCursor().position()
+        self.moveCursor(QtGui.QTextCursor.StartOfLine)
+        line_text = self.textCursor().block().text()
+        if self.textCursor().block().text().startswith(" "):
+            # skip the white space
+            self.moveCursor(QtGui.QTextCursor.NextWord)
+        self.moveCursor(QtGui.QTextCursor.NextCharacter, QtGui.QTextCursor.KeepAnchor)
+        character = self.textCursor().selectedText()
+        if character == "#":
+            # delete #
+            self.textCursor().deletePreviousChar()
+            # delete white space
+            self.moveCursor(QtGui.QTextCursor.NextWord, QtGui.QTextCursor.KeepAnchor)
+            self.textCursor().removeSelectedText()
+        else:
+            self.moveCursor(QtGui.QTextCursor.PreviousCharacter, QtGui.QTextCursor.KeepAnchor)
+            self.textCursor().insertText("# ")
+        cursor = QtGui.QTextCursor(self.textCursor())
+        cursor.setPosition(pos)
+        self.setTextCursor(cursor)
+
+
 class FCComboBox(QtWidgets.QComboBox):
 
     def __init__(self, parent=None, callback=None):