1 // Copyright 2003 Adam Megacz, see the COPYING file for licensing [GPL]
4 import org.bouncycastle.util.encoders.Base64;
10 * A Surface, as described in the XWT Reference.
12 * Platform subclasses should include an inner class subclass of
13 * Surface to return from the Platform._createSurface() method
15 * Note that the members in the section 'state variables' are either
16 * in real-time (the actual size/position/state), or in
17 * MessageQueue-time (the size/position/state at the time that the
18 * now-executing message was enqueued). This distinction is important.
20 public abstract class Surface extends PixelBuffer {
22 public int getWidth() { return root == null ? 0 : root.width; }
23 public int getHeight() { return root == null ? 0 : root.height; }
25 // Static Data ////////////////////////////////////////////////////////////////////////////////
27 /**< the most recently enqueued Move message; used to throttle the message rate */
28 private static Message lastMoveMessage = null;
30 /** all instances of Surface which need to be refreshed by the MessageQueue */
31 public static Vec allSurfaces = new Vec();
33 /** When set to true, render() should abort as soon as possible and restart the rendering process */
34 static volatile boolean abort = false;
36 /** the scar image drawn on the bottom right hand corner */
37 static Box scarBox = null;
39 public static boolean alt = false; ///< true iff the alt button is pressed down, in real time
40 public static boolean control = false; ///< true iff the control button is pressed down, in real time
41 public static boolean shift = false; ///< true iff the shift button is pressed down, in real time
42 public static boolean button1 = false; ///< true iff button 1 is depressed, in MessageQueue-time
43 public static boolean button2 = false; ///< true iff button 2 is depressed, in MessageQueue-time
44 public static boolean button3 = false; ///< true iff button 3 is depressed, in MessageQueue-time
48 // Instance Data ///////////////////////////////////////////////////////////////////////
50 public Box root; /**< The Box at the root of this surface */
51 public String cursor = "default";
53 public int mousex; ///< the x position of the mouse, relative to this Surface, in MessageQueue-time
54 public int mousey; ///< the y position of the mouse, relative to this Surface, in MessageQueue-time
55 public boolean minimized = false; ///< True iff this surface is minimized, in real time
56 public boolean maximized = false; ///< True iff this surface is maximized, in real time
58 /** Dirty regions on the backbuffer which need to be rebuilt using Box.render() */
59 private DirtyList dirtyRegions = new DirtyList();
62 // Used For Simulating Clicks and DoubleClicks /////////////////////////////////////////////////
64 int last_press_x = Integer.MAX_VALUE; ///< the x-position of the mouse the last time a Press message was enqueued
65 int last_press_y = Integer.MAX_VALUE; ///< the y-position of the mouse the last time a Press message was enqueued
66 static int lastClickButton = 0; ///< the last button to recieve a Click message; used for simulating DoubleClick's
67 static long lastClickTime = 0; ///< the last time a Click message was processed; used for simulating DoubleClick's
70 // Methods to be overridden by subclasses ///////////////////////////////////////////////////////
72 public abstract void toBack(); ///< when invoked, the surface should push itself to the back of the stacking order
73 public abstract void toFront(); ///< when invoked, the surface should pull itself to the front of the stacking order
74 public abstract void syncCursor(); ///< the <i>actual</i> cursor for this surface to the cursor referenced by <tt>cursor</tt>
75 public abstract void setInvisible(boolean b); ///< If <tt>b</tt>, make window invisible; otherwise, make it non-invisible.
76 protected abstract void _setMaximized(boolean b); ///< If <tt>b</tt>, maximize the surface; otherwise, un-maximize it.
77 protected abstract void _setMinimized(boolean b); ///< If <tt>b</tt>, minimize the surface; otherwise, un-minimize it.
78 protected abstract void setSize(int width, int height); ///< Sets the surface's width and height.
79 public abstract void setLocation(); ///< Set the surface's x/y position to that of the root box
80 public abstract void setTitleBarText(String s); ///< Sets the surface's title bar text, if applicable
81 public abstract void setIcon(Picture i); ///< Sets the surface's title bar text, if applicable
82 public abstract void _dispose(); ///< Destroy the surface
83 public void setLimits(int min_width, int min_height, int max_width, int max_height) { }
86 // Helper methods for subclasses ////////////////////////////////////////////////////////////
88 protected final void Press(final int button) {
89 last_press_x = mousex;
90 last_press_y = mousey;
92 if (button == 1) button1 = true;
93 else if (button == 2) button2 = true;
94 else if (button == 3) button3 = true;
96 if (button == 1) new SimpleMessage("Press1", Boolean.TRUE, Box.whoIs(root, mousex, mousey));
97 else if (button == 2) new SimpleMessage("Press2", Boolean.TRUE, Box.whoIs(root, mousex, mousey));
98 else if (button == 3) {
99 final Box who = Box.whoIs(root, mousex, mousey);
100 Message.Q.add(new Message() { public void perform() {
101 Platform.clipboardReadEnabled = true;
102 root.put("Press3", Boolean.TRUE);
103 Platform.clipboardReadEnabled = false;
108 protected final void Release(int button) {
109 if (button == 1) button1 = false;
110 else if (button == 2) button2 = false;
111 else if (button == 3) button3 = false;
113 if (button == 1) new SimpleMessage("Release1", Boolean.TRUE, Box.whoIs(root, mousex, mousey));
114 else if (button == 2) new SimpleMessage("Release2", Boolean.TRUE, Box.whoIs(root, mousex, mousey));
115 else if (button == 3) new SimpleMessage("Release3", Boolean.TRUE, Box.whoIs(root, mousex, mousey));
117 if (Platform.needsAutoClick() && Math.abs(last_press_x - mousex) < 5 && Math.abs(last_press_y - mousey) < 5) Click(button);
118 last_press_x = Integer.MAX_VALUE;
119 last_press_y = Integer.MAX_VALUE;
122 protected final void Click(int button) {
123 if (button == 1) new SimpleMessage("Click1", Boolean.TRUE, Box.whoIs(root, mousex, mousey));
124 else if (button == 2) new SimpleMessage("Click2", Boolean.TRUE, Box.whoIs(root, mousex, mousey));
125 else if (button == 3) new SimpleMessage("Click3", Boolean.TRUE, Box.whoIs(root, mousex, mousey));
126 if (Platform.needsAutoDoubleClick()) {
127 long now = System.currentTimeMillis();
128 if (lastClickButton == button && now - lastClickTime < 350) DoubleClick(button);
129 lastClickButton = button;
134 protected final void DoubleClick(int button) {
135 if (button == 1) new SimpleMessage("DoubleClick1", Boolean.TRUE, Box.whoIs(root, mousex, mousey));
136 else if (button == 2) new SimpleMessage("DoubleClick2", Boolean.TRUE, Box.whoIs(root, mousex, mousey));
137 else if (button == 3) new SimpleMessage("DoubleClick3", Boolean.TRUE, Box.whoIs(root, mousex, mousey));
140 /** sends a KeyPressed message; subclasses should not add the C- or A- prefixes, nor should they capitalize alphabet characters */
141 protected final void KeyPressed(String key) {
142 if (key == null) return;
144 if (key.toLowerCase().endsWith("shift")) shift = true;
145 else if (shift) key = key.toUpperCase();
147 if (key.toLowerCase().equals("alt")) alt = true;
148 else if (alt) key = "A-" + key;
150 if (key.toLowerCase().endsWith("control")) control = true;
151 else if (control) key = "C-" + key;
153 final String fkey = key;
154 Message.Q.add(new KMessage(key));
157 // This is implemented as a private static class instead of an anonymous class to work around a GCJ bug
158 private class KMessage implements Message {
160 public KMessage(String k) { key = k; }
161 public void perform() {
162 if (key.equals("C-v") || key.equals("A-v")) Platform.clipboardReadEnabled = true;
164 outer: for(int i=0; i<keywatchers.size(); i++) {
165 Box b = (Box)keywatchers.elementAt(i);
166 for(Box cur = b; cur != null; cur = cur.getParent())
167 if ((cur.flags & cur.INVISIBLE_FLAG) != 0) continue outer;
168 b.put("KeyPressed", key);
171 Platform.clipboardReadEnabled = false;
175 /** sends a KeyReleased message; subclasses should not add the C- or A- prefixes, nor should they capitalize alphabet characters */
176 protected final void KeyReleased(final String key) {
177 if (key == null) return;
178 if (key.toLowerCase().equals("alt")) alt = false;
179 else if (key.toLowerCase().equals("control")) control = false;
180 else if (key.toLowerCase().equals("shift")) shift = false;
181 Message.Q.add(new Message() { public void perform() {
183 outer: for(int i=0; i<keywatchers.size(); i++) {
184 Box b = (Box)keywatchers.elementAt(i);
185 for(Box cur = b; cur != null; cur = cur.getParent())
186 if ((cur.flags & cur.INVISIBLE_FLAG) != 0) continue outer;
187 b.put("KeyReleased", key);
194 * Notify XWT that the mouse has moved. If the mouse leaves the
195 * surface, but the host windowing system does not provide its new
196 * position (for example, a Java MouseListener.mouseExited()
197 * message), the subclass should use (-1,-1).
199 protected final void Move(final int newmousex, final int newmousey) {
200 Message.Q.add(lastMoveMessage = new Message() { public void perform() {
201 synchronized(Surface.this) {
203 // if move messages are arriving faster than we can process them, we just start ignoring them
204 if (lastMoveMessage != this) return;
206 int oldmousex = mousex;
207 int oldmousey = mousey;
211 String oldcursor = cursor;
214 // Root gets motion events outside itself (if trapped, of course)
215 if (!root.inside(oldmousex, oldmousey) && !root.inside(mousex, mousey) && (button1 || button2 || button3))
216 root.put("Move", Boolean.TRUE);
218 root.Move(oldmousex, oldmousey, mousex, mousey);
219 if (!cursor.equals(oldcursor)) syncCursor();
224 protected final void SizeChange(final int width, final int height) {
225 Message.Q.add(new Message() { public void perform() {
226 if (width == root.width && height == root.height) return;
228 root.height = height;
229 root.needs_reflow = true;
234 protected final void PosChange(final int x, final int y) {
235 Message.Q.add(new Message() { public void perform() {
236 root.put("x", new Integer(x));
237 root.put("y", new Integer(y));
241 protected final void Close() { new SimpleMessage("Close", Boolean.TRUE, root); }
242 protected final void Minimized(boolean b) { minimized = b; new SimpleMessage("Minimized", b ? Boolean.TRUE : Boolean.FALSE, root); }
243 protected final void Maximized(boolean b) { maximized = b; new SimpleMessage("Maximized", b ? Boolean.TRUE : Boolean.FALSE, root); }
244 protected final void Focused(boolean b) { new SimpleMessage("Focused", b ? Boolean.TRUE : Boolean.FALSE, root); }
245 public static void Refresh() { Message.Q.refresh(); }
247 public final void setMaximized(boolean b) { if (b != maximized) _setMaximized(maximized = b); }
248 public final void setMinimized(boolean b) { if (b != minimized) _setMinimized(minimized = b); }
251 // Other Methods ///////////////////////////////////////////////////////////////////////////////
253 /** wrapper for setSize() which makes sure to dirty the place where the scar used to be */
256 root.width = Math.max(root.width, scarBox.minwidth);
257 root.height = Math.max(root.height, scarBox.minheight);
258 setSize(root.width, root.height);
260 scarBox.y = root.height - scarBox.minheight;
263 /** Indicates that the Surface is no longer needed */
264 public final void dispose(boolean quitIfAllSurfacesGone) {
265 if (Log.on) Log.log(this, "disposing " + this);
266 allSurfaces.removeElement(this);
268 if (allSurfaces.size() == 0) {
269 if (Log.on) Log.log(this, "exiting because last surface was destroyed");
274 public void dirty(int x, int y, int w, int h) {
275 dirtyRegions.dirty(x, y, w, h);
279 public Surface(Box root) {
283 scarBox.put("image", ((Res)Main.builtin.get("org/xwt/builtin/scar.png")).getInputStream());
284 } catch (Exception e) {
287 scarBox.surface = this;
288 if (root.surface != null && root.surface.root == root) root.surface.dispose(false);
292 // make sure the root is properly sized
293 do { abort = false; root.reflow(); } while(abort);
299 public void paintRegion(int x, int y, int w, int h) {
300 root.render(0, 0, x, y, w, h, this);
301 scarBox.render(0, 0, x, y, w, h, this);
304 /** runs the prerender() and render() pipelines in the root Box to regenerate the backbuffer, then blits it to the screen */
305 public synchronized void render() {
307 // make sure the root is properly sized
311 // update mouseinside and trigger Enter/Leave as a result of box size/position changes
312 String oldcursor = cursor;
314 root.Move(mousex, mousey, mousex, mousey);
315 if (!cursor.equals(oldcursor)) syncCursor();
318 Box.sizePosChangesSinceLastRender = 0;
319 int[][] dirt = dirtyRegions.flush();
320 for(int i = 0; dirt != null && i < dirt.length; i++) {
321 if (dirt[i] == null) continue;
322 int x = dirt[i][0], y = dirt[i][1], w = dirt[i][2], h = dirt[i][3];
325 if (x+w > root.width) w = root.width - x;
326 if (y+h > root.height) h = root.height - y;
327 if (w <= 0 || h <= 0) continue;
329 paintRegion(x, y, w, h);
333 // x,y,w,h is only partially reconstructed, so we must be careful not to re-blit it
334 dirtyRegions.dirty(x, y, w, h);
336 // put back all the dirty regions we haven't yet processed (including the current one)
337 for(int j=i; j<dirt.length; j++)
339 dirtyRegions.dirty(dirt[j][0], dirt[j][1], dirt[j][2], dirt[j][3]);
349 // FEATURE: reinstate recycler
350 public class SimpleMessage implements Message {
352 private Box boxContainingMouse;
353 private Object value;
356 SimpleMessage(String name, Object value, Box boxContainingMouse) {
357 this.boxContainingMouse = boxContainingMouse;
363 public void perform() { boxContainingMouse.put(name, value); }
364 public String toString() { return "SimpleMessage [name=" + name + ", value=" + value + "]"; }
369 // Default PixelBuffer implementation /////////////////////////////////////////////////////////
371 public static abstract class DoubleBufferedSurface extends Surface {
373 public DoubleBufferedSurface(Box root) {
376 // this is a bit dangerous since we're passing ourselves to another method before subclasses' ctors have run...
377 backbuffer = Platform.createPixelBuffer(Platform.getScreenWidth(), Platform.getScreenHeight(), this);
380 /** The automatic double buffer for the root box */
381 PixelBuffer backbuffer = null;
383 /** Dirty regions on the screen which need to be rebuilt using Surface.blit() */
384 DirtyList screenDirtyRegions = new DirtyList();
386 public void drawPicture(Picture source, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2) {
387 backbuffer.drawPicture(source, dx1, dy1, dx2, dy2, sx1, sy1, sx2, sy2); }
389 public void fillRect(int x1, int y1, int x2, int y2, int color) {
390 backbuffer.fillRect(x1, y1, x2, y2, color); }
392 public void paintRegion(int x, int y, int w, int h) {
393 super.paintRegion(x, y, w, h);
394 screenDirtyRegions.dirty(x, y, w, h);
397 public void render() {
399 int[][] dirt = screenDirtyRegions.flush();
400 for(int i = 0; dirt != null && i < dirt.length; i++) {
401 if (dirt[i] == null) continue;
408 if (x+w > root.width) w = root.width - x;
409 if (y+h > root.height) h = root.height - y;
410 if (w <= 0 || h <= 0) continue;
411 blit(backbuffer, x, y, x, y, w + x, h + y);
415 /** This is how subclasses signal a 'shallow dirty', indicating that although the backbuffer is valid, the screen is not */
416 public final void Dirty(int x, int y, int w, int h) {
417 screenDirtyRegions.dirty(x, y, w, h);
421 /** copies a region from the doublebuffer to this surface */
422 public abstract void blit(PixelBuffer source, int sx, int sy, int dx, int dy, int dx2, int dy2);