1. IntelliJ IDEA
PLUGIN DEVELOPMENT

2. Plugin Components
Components are the fundamental concept of plugin
integration. There are three kinds of components:
 Application-level
 Project-level
 Module-level

3. Plugin Extensions and Extension Points
The IntelliJ Platform provides the concept of extensions
and extension points that allows a plugin to interact
with other plugins or with the IDE itself.

4. Plugin Services
A service is a plugin component loaded on demand.
IntelliJ Platform ensures that only one instance of a
service is loaded even though the service is called
several times.

5. Plugin Actions
Intellij IDEA provides the concept of actions. An action
is a class, derived from the AnAction class, whose
actionPerformed method is called when the menu item
or toolbar button is selected.

6. Plugin Content
.IntelliJIDEAx0
plugins
sample.jar/
com/foo/.....
...
...
META-INF
plugin.xml

7. Android Styler plugin development

8. layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="@string/stub"
android:textColor="@android:color/black"/>
</LinearLayout>

9. styles.xml
<style name="TextStub">
<item name="android:layout_width">wrap_content</item>
<item name="android:layout_height">wrap_content</item>
<item name="android:layout_gravity">center</item>
<item name="android:textColor">@android:color/black</item>
</style>

10. Default solution

11. Extract style

12. Usage
 copy lines with future style from your layout.xml file
 paste it to styles.xml file with Ctrl+Shift+D
 enter name of new style in the modal window
 your style is prepared!

13. Plan
 Prepare environment
 Create project and implement functionality
 Build jar and upload it into Plugin Repository

14. Preparations
 Install IntellijIDEA Community Edition
 Download sources of IntellijIDEA Community Edition
(optional)

15. Create project

16. plugin.xml
<idea-plugin version="2">
<!-- … -->
<depends>com.intellij.modules.lang</depends>
<!-- … -->
<actions>
<!-- Add your actions here -->
<action id="3421" class="pro.alex_zaitsev.androidstyler.PasteAction" text="Paste Style"
description="Paste Style">
<add-to-group group-id="EditorPopupMenu" anchor="after" relative-to-action="PasteMultiple"/>
<add-to-group group-id="ConsoleView.PopupMenu" anchor="after" relative-to-action="ConsoleView.Copy"/>
<add-to-group group-id="EditorActions" anchor="first"/>
<keyboard-shortcut keymap="$default" first-keystroke="ctrl shift D"/>
</action>
</actions>
</idea-plugin>

17. <depends> tag
<depends>com.intellij.modules.lang</depends>

18. <actions> tag
<actions>
<!-- Add your actions here -->
<action id="3421" class="pro.alex_zaitsev.androidstyler.PasteAction" text="Paste Style"
description="Paste Style">
<add-to-group group-id="EditorPopupMenu" anchor="after" relative-to-action="PasteMultiple"/>
<add-to-group group-id="ConsoleView.PopupMenu" anchor="after" relative-to-action="ConsoleView.Copy"/>
<add-to-group group-id="EditorActions" anchor="first"/>
<keyboard-shortcut keymap="$default" first-keystroke="ctrl shift D"/>
</action>
</actions>

19. PasteAction
public class PasteAction extends EditorAction {
public PasteAction(EditorActionHandler defaultHandler) {
super(defaultHandler);
}
public PasteAction() {
this(new StylePasteHandler());
}
private static class StylePasteHandler extends EditorWriteActionHandler {
private StylePasteHandler() {
}
@Override
public void executeWriteAction(Editor editor, DataContext dataContext) {
// implementation
}
}
}

20. Implementation

21. Get text from buffer using
CopyPasteManager
private String getCopiedText() {
try {
return (String) CopyPasteManager.getInstance().getContents().getTransferData(DataFlavor.stringFlavor);
} catch (NullPointerException | IOException | UnsupportedFlavorException e) {
e.printStackTrace();
}
return null;
}

22. Get new style name
private String getStyleName() {
return (String) JOptionPane.showInputDialog(
new JFrame(), Consts.DIALOG_NAME_CONTENT,
Consts.DIALOG_NAME_TITLE,
JOptionPane.PLAIN_MESSAGE,
null,
null, "");
}

23. Delete selected text
private void deleteSelectedText(Editor editor, Document document) {
SelectionModel selectionModel = editor.getSelectionModel();
document.deleteString(selectionModel.getSelectionStart(), selectionModel.getSelectionEnd());
}

24. Insert result, move caret and scroll
CaretModel caretModel = editor.getCaretModel();
// insert new string into the document
document.insertString(caretModel.getOffset(), output);
// move caret to the end of inserted text
caretModel.moveToOffset(caretModel.getOffset() + output.length());
// scroll to the end of inserted text
editor.getScrollingModel().scrollToCaret(ScrollType.RELATIVE);

25. Publish

26. Build jar

27. Upload to JetBrains Plugin Repository
https://plugins.jetbrains.com/
Wait for approve (up to 3 work days)

28. Share

29. Have a good plugin development!