Implement softwrapping at user specified margin line

ReText/__init__.py

@@ -84,6 +84,7 @@ def getBundledIcon(iconName):
 	'relativeLineNumbers': False,
 	'restDefaultFileExtension': '.rst',
 	'rightMargin': 0,
+	'rightMarginWrap': False,
 	'saveWindowGeometry': False,
 	'spellCheck': False,
 	'spellCheckLocale': '',

ReText/config.py

@@ -60,6 +60,7 @@ def __init__(self, parent):
 		buttonBox.accepted.connect(self.saveSettings)
 		buttonBox.rejected.connect(self.close)
 		self.initWidgets()
+		self.configurators['rightMargin'].valueChanged.connect(self.handleRightMarginSet)
 		self.layout.addWidget(buttonBox, len(self.options), 0, 1, 2)
 
 	def initConfigOptions(self):
@@ -83,6 +84,7 @@ def initConfigOptions(self):
 			(self.tr('Tab key inserts spaces'), 'tabInsertsSpaces'),
 			(self.tr('Tabulation width'), 'tabWidth'),
 			(self.tr('Draw vertical line at column'), 'rightMargin'),
+			(self.tr('Enable soft wrap'), 'rightMarginWrap'),
 			(self.tr('Show document stats'), 'documentStatsEnabled'),
 			(self.tr('Interface'), None),
 			(self.tr('Icon theme name'), 'iconTheme'),
@@ -122,6 +124,8 @@ def initWidgets(self):
 			if isinstance(value, bool):
 				self.configurators[name] = QCheckBox(self)
 				self.configurators[name].setChecked(value)
+				if name == 'rightMarginWrap' and (globalSettings.rightMargin == 0):
+					self.configurators[name].setEnabled(False)
 			elif isinstance(value, int):
 				self.configurators[name] = QSpinBox(self)
 				if name == 'tabWidth':
@@ -137,6 +141,14 @@ def initWidgets(self):
 			self.layout.addWidget(label, index, 0)
 			self.layout.addWidget(self.configurators[name], index, 1, Qt.AlignRight)
 
+	def handleRightMarginSet(self, value):
+		if value > 0:
+			self.configurators['rightMarginWrap'].setEnabled(True)
+			self.configurators['rightMarginWrap'].setChecked(globalSettings.rightMarginWrap)
+		else:
+			self.configurators['rightMarginWrap'].setChecked(False)
+			self.configurators['rightMarginWrap'].setEnabled(False)
+
 	def saveSettings(self):
 		for option in self.options:
 			name = option[1]
@@ -170,5 +182,6 @@ def applySettings(self):
 			print(e, file=sys.stderr)
 		for tab in self.parent.iterateTabs():
 			tab.editBox.updateFont()
+			tab.editBox.setWrapModeAndWidth()
 			tab.editBox.viewport().update()
 		self.parent.updateStyleSheet()

ReText/editor.py

@@ -106,12 +106,20 @@ def __init__(self, parent):
 		self.statistics = (0, 0, 0)
 		self.statsArea = TextInfoArea(self)
 		self.updateFont()
+		self.setWrapModeAndWidth()
 		self.document().blockCountChanged.connect(self.updateLineNumberAreaWidth)
 		self.cursorPositionChanged.connect(self.highlightCurrentLine)
 		self.document().contentsChange.connect(self.contentsChange)
 		if globalSettings.useFakeVim:
 			self.installFakeVimHandler()
 
+	def setWrapModeAndWidth(self):
+		if globalSettings.rightMarginWrap and (self.rect().topRight().x() > self.marginx):
+			self.setLineWrapMode(QTextEdit.FixedPixelWidth)
+			self.setLineWrapColumnOrWidth(self.marginx)
+		else:
+			self.setLineWrapMode(QTextEdit.WidgetWidth)
+
 	def updateFont(self):
 		self.setFont(globalSettings.editorFont)
 		metrics = self.fontMetrics()
@@ -250,6 +258,7 @@ def resizeEvent(self, event):
 			self.lineNumberAreaWidth(), rect.height())
 		self.infoArea.updateTextAndGeometry()
 		self.statsArea.updateTextAndGeometry()
+		self.setWrapModeAndWidth()
 
 	def highlightCurrentLine(self):
 		if globalSettings.relativeLineNumbers:
@@ -495,4 +504,3 @@ def getText(self):
 		                   'count of words, alphanumeric characters, all characters')
 		words, alphaNums, characters = self.editor.statistics
 		return template % (words, alphaNums, characters)
-