Update readme for change from snippets to IntelliSense

README.md

@@ -5,8 +5,8 @@ and developed from Damien122's release.
 
 ## Features
 
-* Show AutoIt Syntax highlighting
-* Snippets for Functions, Packaged UDFs, and Macros
+* AutoIt Syntax highlighting
+* IntelliSense (code hints and completion)
 * Launch, compile and build scripts from VSCode
 * Launch AutoIt Help for highlighted text 
 
@@ -16,4 +16,4 @@ Advanced functions on the full install of [SciTE4AutoIt3](https://www.autoitscri
 ## GitHub
 Check out the code, leave feedback and feature requests now on [GitHub/loganch](https://github.com/loganch/AutoIt-VSCode)
 ### Contributing
-Please fork the repository and contribute back using pull requests.
+Please fork the repository and contribute using pull requests.

out/src/ai_signature.js

@@ -0,0 +1,86 @@
+'use strict'
+
+var { languages, Position, SignatureHelp, SignatureInformation, ParameterInformation } = require('vscode')
+
+
+module.exports = languages.registerSignatureHelpProvider(
+    { language: 'autoit', scheme: 'file' },
+    {
+        provideSignatureHelp(document, position, token) {
+            let theCall = frontOfCall(document, position)
+            if (theCall == null) {
+                return null
+            }
+            let callerPos = this.prevTokenPos(document, theCall.openParen)
+            return definitionLocation(document, callerPos, { language: 'autoit', scheme: 'file' }).then(res => {
+                if (!res) {
+                    // The definition was not found
+                    return null
+                }
+                if (res.line === callerPos.line) {
+                    // This must be a function definition
+                    return null
+                }
+                let result = new SignatureHelp()
+                let declarationText, sig
+                let si
+                declarationText = res.declarationlines[0]
+                let funcNameStart = declarationText.indexOf(res.name + '('); // Find 'functionname(' to remove anything before it
+                if (funcNameStart > 0) {
+                    declarationText = declarationText.substring(funcNameStart)
+                }
+                si = new SignatureInformation(declarationText, res.doc)
+                sig = declarationText.substring(res.name.length)
+
+                si.parameters = parameters(sig).map(paramText =>
+                    new ParameterInformation(paramText)
+                )
+                result.signatures = [si]
+                result.activeSignature = 0;
+                result.activeParameter = Math.min(theCall.commas.length, si.parameters.length - 1)
+                return result
+            })
+        }
+    },
+    ',', '('
+)
+
+var prevTokenPos = function(doc, pos) {
+    while (pos.character > 0) {
+        let word = doc.getWordRangeAtPosition(pos)
+        if (word) {
+            return word.start
+        }
+
+        pos = pos.translate(0, -1)
+    }
+    return null
+}
+
+var frontOfCall = function(doc, pos) {
+    let currentLine = doc.lineAt(pos.line).text.substring(0, pos.character)
+    let parenBalance = 0
+    let commas = []
+
+    for (let char = pos.character; char >= 0; char--) {
+        switch(currentLine[char]) {
+            case '(':
+                parenBalance--
+                if (parenBalance < 0) {
+                    return {
+                        openParen: new Position(pos.line, char),
+                        commas: commas
+                    }
+                }
+                break
+            case ')':
+                parenBalance++
+                break
+            case ',':
+                if (parenBalance === 0) {
+                    commas.push(new Position(pos.line, char))
+                }
+        }
+    }
+    return null
+}

out/src/signatures/functions.json

@@ -0,0 +1,10 @@
+{
+    "ClipGet": {
+        "description": "Retrieves text from the clipboard.",
+        "signature": "( )"
+    },
+    "ClipPut": {
+        "description": "Writes text to the clipboard.",
+        "signature": "( \"value\" )"
+    }
+}