MinifyXML Minify support

Fixes redhat-developer#609

Signed-off-by: azerr <azerr@redhat.com>

Author: angelozerr

docs/Commands.md

@@ -29,3 +29,17 @@ When the [Server Cache Path](Preferences.md#server-cache-path) is activated, the
 ## Restart XML Language Server
 
 This command restarts the XML language server.
+
+## Minify XML Document
+
+This command minifies the current XML document by removing unnecessary whitespace while preserving the document's structure and content.
+
+The minification process:
+- Removes all indentation and line breaks between elements
+- Removes whitespace between the XML declaration and the root element
+- Normalizes whitespace sequences inside text content to a single space
+- Preserves whitespace in elements with `xml:space="preserve"` attribute
+- Preserves content in CDATA sections
+- Reduces multiple spaces between attributes to a single space
+
+This is useful for reducing file size before transmitting or storing XML documents.

package-lock.json

@@ -841,6 +841,11 @@
         "command": "xml.refactor.surround.with.cdata",
         "title": "Surround with CDATA",
         "category": "XML"
+      },
+      {
+        "command": "xml.minify",
+        "title": "Minify XML Document",
+        "category": "XML"
       }
     ],
     "menus": {
@@ -872,6 +877,10 @@
         {
           "command": "xml.refactor.surround.with.cdata",
           "when": "editorLangId in xml.supportedLanguageIds && XMLLSReady"
+        },
+        {
+          "command": "xml.minify",
+          "when": "editorLangId in xml.supportedLanguageIds && XMLLSReady"
         }
       ],
       "editor/context": [

package.json

@@ -74,4 +74,9 @@ export const EXECUTE_WORKSPACE_COMMAND = 'xml.workspace.executeCommand';
 
  export const REFACTOR_SURROUND_WITH_COMMENTS = 'xml.refactor.surround.with.comments';
 
- export const REFACTOR_SURROUND_WITH_CDATA = 'xml.refactor.surround.with.cdata';
+ export const REFACTOR_SURROUND_WITH_CDATA = 'xml.refactor.surround.with.cdata';
+
+/**
+ * Command to minify XML document.
+ */
+ export const MINIFY_DOCUMENT = 'xml.minify';

src/commands/clientCommandConstants.ts

@@ -32,6 +32,7 @@ export async function registerClientServerCommands(context: ExtensionContext, la
   registerCodeLensReferencesCommands(context, languageClient);
   registerValidationCommands(context);
   registerRefactorCommands(context, languageClient);
+  registerMinifyCommand(context, languageClient);
   registerAssociationCommands(context, languageClient);
   registerRestartLanguageServerCommand(context, languageClient);
   registerConfigurationUpdateCommand();
@@ -467,3 +468,43 @@ async function surroundWith(surroundWithType: SurroundWithKind, languageClient:
   }
 
 }
+
+/**
+ * Register command to minify XML document
+ *
+ * @param context the extension context
+ * @param languageClient the language client
+ */
+function registerMinifyCommand(context: ExtensionContext, languageClient: LanguageClient) {
+  context.subscriptions.push(commands.registerCommand(ClientCommandConstants.MINIFY_DOCUMENT, async () => {
+    const activeEditor = window.activeTextEditor;
+    if (!activeEditor || activeEditor.document.languageId !== 'xml') {
+      return;
+    }
+
+    const uri = activeEditor.document.uri;
+    const identifier = TextDocumentIdentifier.create(uri.toString());
+
+    try {
+      // Call the server command to get the minified text edits
+      const edits: TextEdit[] = await commands.executeCommand(
+        ClientCommandConstants.EXECUTE_WORKSPACE_COMMAND,
+        ServerCommandConstants.MINIFY_DOCUMENT,
+        identifier
+      );
+
+      if (!edits || edits.length === 0) {
+        return;
+      }
+
+      // Apply the text edits
+      const workEdits = new WorkspaceEdit();
+      for (const edit of edits) {
+        workEdits.replace(uri, languageClient.protocol2CodeConverter.asRange(edit.range), edit.newText);
+      }
+      await workspace.applyEdit(workEdits);
+    } catch (error) {
+      window.showErrorMessage('Error during XML minification: ' + error.message);
+    }
+  }));
+}

src/commands/registerCommands.ts

@@ -34,4 +34,9 @@ export const CHECK_FILE_PATTERN = "xml.check.file.pattern";
 /**
  * Command to surround with tags, comments, cdata
  */
- export const REFACTOR_SURROUND_WITH = "xml.refactor.surround.with";
+ export const REFACTOR_SURROUND_WITH = "xml.refactor.surround.with";
+
+/**
+ * Command to minify XML document
+ */
+ export const MINIFY_DOCUMENT = "xml.minify.document";