VirtualKeyboard: hold left/right arrows moves to start/end of line (#7730)

frontend/ui/widget/inputtext.lua

@@ -755,6 +755,18 @@ function InputText:rightChar()
     self.charpos, self.top_line_num = self.text_widget:getCharPos()
 end
 
+function InputText:goToStartOfLine()
+    local new_pos = select(1, self:getStringPos({"\n", "\r"}, {"\n", "\r"}))
+    self.text_widget:moveCursorToCharPos(new_pos)
+    self.charpos, self.top_line_num = self.text_widget:getCharPos()
+end
+
+function InputText:goToEndOfLine()
+    local new_pos = select(2, self:getStringPos({"\n", "\r"}, {"\n", "\r"})) + 1
+    self.text_widget:moveCursorToCharPos(new_pos)
+    self.charpos, self.top_line_num = self.text_widget:getCharPos()
+end
+
 function InputText:goToHome()
     self.text_widget:moveCursorToCharPos(1)
 end

frontend/ui/widget/virtualkeyboard.lua

@@ -113,8 +113,16 @@ function VirtualKey:init()
         --self.skiphold = true
     elseif self.label =="←" then
         self.callback = function() self.keyboard:leftChar() end
+        self.hold_callback = function()
+            self.ignore_key_release = true
+            self.keyboard:goToStartOfLine()
+        end
     elseif self.label == "→" then
         self.callback = function() self.keyboard:rightChar() end
+        self.hold_callback = function()
+            self.ignore_key_release = true
+            self.keyboard:goToEndOfLine()
+        end
     elseif self.label == "↑" then
         self.callback = function() self.keyboard:upLine() end
     elseif self.label == "↓" then
@@ -899,6 +907,14 @@ function VirtualKeyboard:rightChar()
     self.inputbox:rightChar()
 end
 
+function VirtualKeyboard:goToStartOfLine()
+    self.inputbox:goToStartOfLine()
+end
+
+function VirtualKeyboard:goToEndOfLine()
+    self.inputbox:goToEndOfLine()
+end
+
 function VirtualKeyboard:upLine()
     self.inputbox:upLine()
 end