add initial support of tag suggestion

sources/qml/AWTextEditor.qml

@@ -16,12 +16,60 @@
  ***************************************************************************/
 
 import QtQuick 2.0
-import QtQuick.Controls 1.3 as QtControls
+import QtQuick.Controls 2.0 as QtControls
 
 
-QtControls.TextArea {
+Item {
     width: parent.width
     height: parent.height * 4 / 5
-    textFormat: TextEdit.PlainText
-    text: plasmoid.configuration.text
+
+    property var backend
+    property alias text: textArea.text
+
+    QtControls.TextArea {
+        id: textArea
+        anchors.fill: parent
+        textFormat: TextEdit.PlainText
+
+        QtControls.ToolTip {
+            id: tooltip
+        }
+
+        onTextChanged: {
+            var currentTag = getLastTag()
+            // exit if there are spaces or empty
+            if ((currentTag.indexOf(" ") != -1) || (currentTag.length == 0)) {
+                tooltip.visible = false
+                return
+            }
+            var tags = backend.dictKeys(true, "^" + currentTag).join('\n')
+            // exit if no suggestion found
+            if (tags.length == 0) {
+                tooltip.visible = false
+                return
+            }
+            // update tooltip and show it
+            tooltip.text = tags
+            changeTooltipPosition()
+            tooltip.visible = true
+        }
+    }
+
+    function changeTooltipPosition() {
+        tooltip.x = textArea. cursorRectangle.x
+        tooltip.y = textArea. cursorRectangle.y
+    }
+
+    function getLastTag() {
+        // get substring to analyze
+        var substring = textArea.getText(0, textArea.cursorPosition)
+        // find last position of index in the given substring
+        var signIndex = substring.lastIndexOf('$') + 1
+        if ((signIndex == 0) || (signIndex == textArea.cursorPosition))
+            return ""
+        // get current tag text
+        return substring.substr(signIndex)
+    }
 }
+
+