Add keyword completion

src/LanguageServer.php

@@ -6,6 +6,7 @@
 use LanguageServer\Protocol\{ServerCapabilities, ClientCapabilities, TextDocumentSyncKind, Message};
 use LanguageServer\Protocol\InitializeResult;
 use AdvancedJsonRpc\{Dispatcher, ResponseError, Response as ResponseBody, Request as RequestBody};
+use LanguageServer\Protocol\CompletionOptions;
 
 class LanguageServer extends \AdvancedJsonRpc\Dispatcher
 {
@@ -76,6 +77,10 @@ public function initialize(string $rootPath, int $processId, ClientCapabilities
         $serverCapabilities->documentSymbolProvider = true;
         // Support "Format Code"
         $serverCapabilities->documentFormattingProvider = true;
+
+        $completionOptions = new CompletionOptions();
+        $completionOptions->resolveProvider = false;
+        $serverCapabilities->completionProvider = $completionOptions;
         return new InitializeResult($serverCapabilities);
     }
 

src/Protocol/CompletionItem.php

@@ -60,14 +60,14 @@ class CompletionItem
      */
     public $insertText;
 
-    /**
-     * An edit which is applied to a document when selecting
-     * this completion. When an edit is provided the value of
-     * insertText is ignored.
-     *
-     * @var TextEdit|null
-     */
-    public $textEdit;
+//     /**
+//      * An edit which is applied to a document when selecting
+//      * this completion. When an edit is provided the value of
+//      * insertText is ignored.
+//      *
+//      * @var TextEdit|null
+//      */
+//     public $textEdit;
 
     /**
      * An data entry field that is preserved on a completion item between

src/Server/Completion/KeywordData.php

@@ -0,0 +1,30 @@
+<?php
+namespace LanguageServer\Server\Completion;
+
+class KeywordData
+{
+
+    private $label;
+
+    private $insertText;
+
+    public function __construct(string $label, string $insertText = null)
+    {
+        $this->label = $label;
+        if ($insertText == null) {
+            $this->insertText = $label;
+        } else {
+            $this->insertText = $insertText;
+        }
+    }
+
+    public function getLabel()
+    {
+        return $this->label;
+    }
+
+    public function getInsertText()
+    {
+        return $this->insertText;
+    }
+}

src/Server/Completion/PHPKeywords.php

@@ -0,0 +1,99 @@
+<?php
+namespace LanguageServer\Server\Completion;
+
+class PHPKeywords
+{
+
+    /**
+     *
+     * @var KeywordData[]
+     */
+    private $keywords;
+
+    public function __construct()
+    {
+        $this->keywords = [
+            new KeywordData("abstract"),
+            new KeywordData("and"),
+            new KeywordData("array"),
+            new KeywordData("as"),
+            new KeywordData("break"),
+            new KeywordData("callable"),
+            new KeywordData("case"),
+            new KeywordData("catch"),
+            new KeywordData("class"),
+            new KeywordData("clone"),
+            new KeywordData("const"),
+            new KeywordData("continue"),
+            new KeywordData("declare"),
+            new KeywordData("default"),
+            new KeywordData("die"),
+            new KeywordData("do"),
+            new KeywordData("echo"),
+            new KeywordData("else"),
+            new KeywordData("elseif"),
+            new KeywordData("empty"),
+            new KeywordData("enddeclare"),
+            new KeywordData("endfor"),
+            new KeywordData("endforeach"),
+            new KeywordData("endif"),
+            new KeywordData("endswitch"),
+            new KeywordData("endwhile"),
+            new KeywordData("eval"),
+            new KeywordData("exit"),
+            new KeywordData("extends"),
+            new KeywordData("false"),
+            new KeywordData("final"),
+            new KeywordData("finally"),
+            new KeywordData("for", "for ()"),
+            new KeywordData("foreach", "foreach ()"),
+            new KeywordData("function"),
+            new KeywordData("global"),
+            new KeywordData("goto"),
+            new KeywordData("if", "if ()"),
+            new KeywordData("implements"),
+            new KeywordData("include"),
+            new KeywordData("include_once"),
+            new KeywordData("instanceof"),
+            new KeywordData("insteadof"),
+            new KeywordData("interface"),
+            new KeywordData("isset"),
+            new KeywordData("list"),
+            new KeywordData("namespace"),
+            new KeywordData("new"),
+            new KeywordData("null"),
+            new KeywordData("or"),
+            new KeywordData("parent"),
+            new KeywordData("print"),
+            new KeywordData("private"),
+            new KeywordData("protected"),
+            new KeywordData("public"),
+            new KeywordData("require"),
+            new KeywordData("require_once"),
+            new KeywordData("return"),
+            new KeywordData("self"),
+            new KeywordData("static"),
+            new KeywordData("switch", "switch ()"),
+            new KeywordData("throw"),
+            new KeywordData("trait"),
+            new KeywordData("true"),
+            new KeywordData("try"),
+            new KeywordData("unset"),
+            new KeywordData("use"),
+            new KeywordData("var"),
+            new KeywordData("while"),
+            new KeywordData("xor"),
+            new KeywordData("yield")
+        ];
+    }
+
+    /**
+     * List of supported PHP keywords
+     *
+     * @return KeywordData[]
+     */
+    public function getKeywords()
+    {
+        return $this->keywords;
+    }
+}

src/Server/TextDocument.php

@@ -15,8 +15,11 @@
     Range,
     Position,
     FormattingOptions,
-    TextEdit
+    TextEdit,
+    CompletionItem,
+    CompletionItemKind
 };
+use LanguageServer\Server\Completion\PHPKeywords;
 
 /**
  * Provides method handlers for all textDocument/* methods
@@ -27,7 +30,7 @@ class TextDocument
      * @var \PhpParser\Parser
      */
     private $parser;
-
+   
     /**
      * A map from file URIs to ASTs
      *
@@ -93,7 +96,7 @@ public function didChange(VersionedTextDocumentIdentifier $textDocument, array $
     {
         $this->updateAst($textDocument->uri, $contentChanges[0]->text);
     }
-
+    
     /**
      * Re-parses a source file, updates the AST and reports parsing errors that may occured as diagnostics
      *
@@ -128,6 +131,19 @@ private function updateAst(string $uri, string $content)
         }
     }
 
+    /**
+     * The document close notification is sent from the client to the server when the document got closed in the client.
+     * The document's truth now exists where the document's uri points to (e.g. if the document's
+     * uri is a file uri the truth now exists on disk).
+     *
+     * @param \LanguageServer\Protocol\TextDocumentIdentifier $textDocument
+     * @return void
+     */
+    public function didClose(TextDocumentIdentifier $textDocument)
+    {
+        unset($this->asts[$textDocument->uri]);
+    }
+
     /**
      * The document formatting request is sent from the server to the client to format a whole document.
      *
@@ -148,4 +164,19 @@ public function formatting(TextDocumentIdentifier $textDocument, FormattingOptio
         return [$edit];
     }
 
+    public function completion(TextDocumentIdentifier $textDocument, Position $position)
+    {
+        $items = [];
+        $keywords = new PHPKeywords();
+        foreach ($keywords->getKeywords() as $keyword){
+            $item = new CompletionItem();
+            $item->label = $keyword->getLabel();
+            $item->kind = CompletionItemKind::KEYWORD;
+            $item->insertText = $keyword->getInsertText();
+            $item->detail = "PHP Language Server";
+            $items[] = $item;
+        }
+        return $items;
+    }
+
 }