got basic- very basic- indenting working

Author: kazimuth

release/PythonMode.zip

@@ -22,6 +22,12 @@
 public class PythonKeyListener extends processing.mode.java.PdeKeyListener {
 	PythonEditor peditor;
 	JEditTextArea ptextarea;
+
+	
+	//ctrl-alt on windows & linux, cmd-alt on os x
+	private static int CTRL_ALT = ActionEvent.ALT_MASK
+			| Toolkit.getDefaultToolkit().getMenuShortcutKeyMask(); 
+	
 
 	public PythonKeyListener(Editor editor, JEditTextArea textarea) {
 		super(editor, textarea);
@@ -33,16 +39,87 @@ public PythonKeyListener(Editor editor, JEditTextArea textarea) {
 	/*
 	 * Handles special stuff for Java brace indenting & outdenting, etc.
 	 * Overriding it 'cause we do things different here in python-land
+	 * 
+	 * TODO use actual parser; handle spaces
+	 * 
+	 * @return true if we've handled things correctly
 	 */
-	/*@Override
+	@Override
 	public boolean keyPressed(KeyEvent event){
 		char c = event.getKeyChar();
 		int code = event.getKeyCode();
 
 		Sketch sketch = peditor.getSketch();
 
+		// things that change the content of the text area
+		if ((code == KeyEvent.VK_BACK_SPACE) || (code == KeyEvent.VK_TAB)
+				|| (code == KeyEvent.VK_ENTER) || ((c >= 32) && (c < 128))) {
+			sketch.setModified(true);
+		}
+		
+		// ctrl-alt-[arrow] switches sketch tab
+		if ((event.getModifiers() & CTRL_ALT) == CTRL_ALT) {
+			if (code == KeyEvent.VK_LEFT) {
+				sketch.handlePrevCode();
+				return true;
+			} else if (code == KeyEvent.VK_RIGHT) {
+				sketch.handleNextCode();
+				return true;
+			}
+		}
+		
+		//TODO handle ctrl-[up|down]; should move cursor to next empty line in that direction
+		
+		// handle specific keypresses
+		switch (c) {
+
+		case 9: //tab; may do something here later. NOT overriding with spaces- this is python!
+			ptextarea.setSelectedText("\t");
+			break;
+
+		case 10: //return
+		case 13: //also return
+			char[] text = ptextarea.getText().toCharArray();	//text
+			int cursorLocation = ptextarea.getCaretPosition();	//location of element to be placed; may be out of bounds
+			
+			int tabs = getTabCount(cursorLocation, text);
+						
+			String insert = "\n";
+			for(int i=0; i<tabs; i++){
+				insert += "\t";
+			}
+			
+			ptextarea.setSelectedText(insert);
+			break;
+		}
+		
 
 
 		return false;
-	}*/
+	}
+	
+	//given an index and a block of text, find the number of tabs in the line containing the index
+	//TODO dirty hack
+	int getTabCount(int index, char[] text){
+		int prev = index-1; //the start of the line
+		
+		
+		//walk till we find the beginning of the line (or text)
+		while(prev >= 0 && text[prev] != '\n'){
+			prev--;
+		}
+		//prev is now at the previous newline
+		prev++;
+		
+		//prev is now at the beginning of the line
+		//walk forward, counting tabs
+		int tabCount = 0;
+		while(prev < text.length && text[prev] == '\t'){
+			tabCount++;
+			prev++;
+		}
+		
+		return tabCount;
+	}
+	
 }