--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwt/graphics/Path.d	Sat Aug 09 17:00:02 2008 +0200
@@ -0,0 +1,569 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2007 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+module dwt.graphics.Path;
+
+import dwt.dwthelper.utils;
+
+import dwt.DWT;
+import dwt.DWTError;
+import dwt.DWTException;
+import dwt.internal.cocoa.NSAffineTransform;
+import dwt.internal.cocoa.NSBezierPath;
+import dwt.internal.cocoa.NSLayoutManager;
+import dwt.internal.cocoa.NSPoint;
+import dwt.internal.cocoa.NSRange;
+import dwt.internal.cocoa.NSRect;
+import dwt.internal.cocoa.NSSize;
+import dwt.internal.cocoa.NSString;
+import dwt.internal.cocoa.NSTextContainer;
+import dwt.internal.cocoa.NSTextStorage;
+import dwt.internal.cocoa.OS;
+
+/**
+ * Instances of this class represent paths through the two-dimensional
+ * coordinate system. Paths do not have to be continuous, and can be
+ * described using lines, rectangles, arcs, cubic or quadratic bezier curves,
+ * glyphs, or other paths.
+ * <p>
+ * Application code must explicitly invoke the <code>Path.dispose()</code> 
+ * method to release the operating system resources managed by each instance
+ * when those instances are no longer required.
+ * </p>
+ * <p>
+ * This class requires the operating system's advanced graphics subsystem
+ * which may not be available on some platforms.
+ * </p>
+ * 
+ * @since 3.1
+ */
+public class Path extends Resource {
+    
+    /**
+     * the OS resource for the Path
+     * (Warning: This field is platform dependent)
+     * <p>
+     * <b>IMPORTANT:</b> This field is <em>not</em> part of the DWT
+     * public API. It is marked public only so that it can be shared
+     * within the packages provided by DWT. It is not available on all
+     * platforms and should never be accessed from application code.
+     * </p>
+     */
+    public NSBezierPath handle;
+
+/**
+ * Constructs a new empty Path.
+ * <p>
+ * This operation requires the operating system's advanced
+ * graphics subsystem which may not be available on some
+ * platforms.
+ * </p>
+ * 
+ * @param device the device on which to allocate the path
+ * 
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the device is null and there is no current device</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
+ * </ul>
+ * @exception DWTError <ul>
+ *    <li>ERROR_NO_HANDLES if a handle for the path could not be obtained</li>
+ * </ul>
+ * 
+ * @see #dispose()
+ */
+public Path (Device device) {
+    super(device);
+    handle = NSBezierPath.bezierPath();
+    if (handle is null) DWT.error(DWT.ERROR_NO_HANDLES);
+    handle.retain();
+    handle.moveToPoint(new NSPoint());
+    init();
+}
+
+public Path (Device device, Path path, float flatness) {
+    super(device);
+    if (path is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
+    if (path.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT);
+    flatness = Math.max(0, flatness);
+    if (flatness is 0) {
+        handle = new NSBezierPath(path.handle.copy().id);
+    } else {
+        float defaultFlatness = NSBezierPath.defaultFlatness();
+        NSBezierPath.setDefaultFlatness(flatness);
+        handle = path.handle.bezierPathByFlatteningPath();
+        NSBezierPath.setDefaultFlatness(defaultFlatness);       
+    }
+    if (handle is null) DWT.error(DWT.ERROR_NO_HANDLES);
+    init();
+}
+
+public Path (Device device, PathData data) {
+    this(device);
+    if (data is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
+    init(data);
+}
+
+/**
+ * Adds to the receiver a circular or elliptical arc that lies within
+ * the specified rectangular area.
+ * <p>
+ * The resulting arc begins at <code>startAngle</code> and extends  
+ * for <code>arcAngle</code> degrees.
+ * Angles are interpreted such that 0 degrees is at the 3 o'clock
+ * position. A positive value indicates a counter-clockwise rotation
+ * while a negative value indicates a clockwise rotation.
+ * </p><p>
+ * The center of the arc is the center of the rectangle whose origin 
+ * is (<code>x</code>, <code>y</code>) and whose size is specified by the 
+ * <code>width</code> and <code>height</code> arguments. 
+ * </p><p>
+ * The resulting arc covers an area <code>width + 1</code> pixels wide
+ * by <code>height + 1</code> pixels tall.
+ * </p>
+ *
+ * @param x the x coordinate of the upper-left corner of the arc
+ * @param y the y coordinate of the upper-left corner of the arc
+ * @param width the width of the arc
+ * @param height the height of the arc
+ * @param startAngle the beginning angle
+ * @param arcAngle the angular extent of the arc, relative to the start angle
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void addArc(float x, float y, float width, float height, float startAngle, float arcAngle) {
+    if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED);
+    NSAffineTransform transform = NSAffineTransform.transform();
+    transform.translateXBy(x + width / 2f, y + height / 2f);
+    transform.scaleXBy(width / 2f, height / 2f);
+    NSBezierPath path = NSBezierPath.bezierPath();
+    NSPoint center = new NSPoint();
+    float sAngle = -startAngle;
+    float eAngle = -(startAngle + arcAngle);
+    path.appendBezierPathWithArcWithCenter_radius_startAngle_endAngle_clockwise_(center, 1, sAngle,  eAngle, arcAngle>0);
+    path.transformUsingAffineTransform(transform);
+    handle.appendBezierPath(path);
+}
+
+/**
+ * Adds to the receiver the path described by the parameter.
+ *
+ * @param path the path to add to the receiver
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the parameter is null</li>
+ *    <li>ERROR_INVALID_ARGUMENT - if the parameter has been disposed</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void addPath(Path path) {
+    if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED);
+    if (path is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
+    if (path.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT);
+    handle.appendBezierPath(path.handle);
+}
+
+/**
+ * Adds to the receiver the rectangle specified by x, y, width and height.
+ *
+ * @param x the x coordinate of the rectangle to add
+ * @param y the y coordinate of the rectangle to add
+ * @param width the width of the rectangle to add
+ * @param height the height of the rectangle to add
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void addRectangle(float x, float y, float width, float height) {
+    if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED);
+    NSRect rect = new NSRect();
+    rect.x = x;
+    rect.y = y;
+    rect.width = width;
+    rect.height = height;
+    handle.appendBezierPathWithRect(rect);
+}
+
+/**
+ * Adds to the receiver the pattern of glyphs generated by drawing
+ * the given string using the given font starting at the point (x, y).
+ *
+ * @param string the text to use
+ * @param x the x coordinate of the starting point
+ * @param y the y coordinate of the starting point
+ * @param font the font to use
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the font is null</li>
+ *    <li>ERROR_INVALID_ARGUMENT - if the font has been disposed</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void addString(String string, float x, float y, Font font) {
+    if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED);
+    if (font is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
+    if (font.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT);
+    NSString str = NSString.stringWith(string);
+    NSTextStorage textStorage = ((NSTextStorage)new NSTextStorage().alloc());
+    textStorage.initWithString_(str);
+    NSLayoutManager layoutManager = (NSLayoutManager)new NSLayoutManager().alloc().init();
+    NSTextContainer textContainer = (NSTextContainer)new NSTextContainer().alloc();
+    NSSize size = new NSSize();
+    size.width = Float.MAX_VALUE;
+    size.height = Float.MAX_VALUE;
+    textContainer.initWithContainerSize(size);
+    textStorage.addLayoutManager(layoutManager);
+    layoutManager.addTextContainer(textContainer);
+    NSRange range = new NSRange();
+    range.length = str.length();
+    textStorage.beginEditing();
+    textStorage.addAttribute(OS.NSFontAttributeName(), font.handle, range);
+    textStorage.endEditing();
+    range = layoutManager.glyphRangeForTextContainer(textContainer);
+    if (range.length !is 0) {
+        int glyphs = OS.malloc(4 * range.length * 2);
+        layoutManager.getGlyphs(glyphs, range);
+        NSBezierPath path = NSBezierPath.bezierPath();
+        NSPoint point = new NSPoint();
+        point.x = x;
+        point.y = y;
+        path.moveToPoint(point);
+        path.appendBezierPathWithGlyphs(glyphs, range.length, font.handle);
+        NSAffineTransform transform = NSAffineTransform.transform();
+        transform.scaleXBy(1, -1);
+        transform.translateXBy(0, -((2*y) + textStorage.size().height));
+        path.transformUsingAffineTransform(transform);
+        OS.free(glyphs);
+        handle.appendBezierPath(path);
+    }
+    textContainer.release();
+    layoutManager.release();
+    textStorage.release();
+}
+
+/**
+ * Closes the current sub path by adding to the receiver a line
+ * from the current point of the path back to the starting point
+ * of the sub path.
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void close() {
+    if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED);
+    handle.closePath();
+}
+
+/**
+ * Returns <code>true</code> if the specified point is contained by
+ * the receiver and false otherwise.
+ * <p>
+ * If outline is <code>true</code>, the point (x, y) checked for containment in
+ * the receiver's outline. If outline is <code>false</code>, the point is
+ * checked to see if it is contained within the bounds of the (closed) area
+ * covered by the receiver.
+ *
+ * @param x the x coordinate of the point to test for containment
+ * @param y the y coordinate of the point to test for containment
+ * @param gc the GC to use when testing for containment
+ * @param outline controls whether to check the outline or contained area of the path
+ * @return <code>true</code> if the path contains the point and <code>false</code> otherwise
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the gc is null</li>
+ *    <li>ERROR_INVALID_ARGUMENT - if the gc has been disposed</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public bool contains(float x, float y, GC gc, bool outline) {
+    if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED);
+    if (gc is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
+    if (gc.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT);
+//  gc.checkGC(GC.LINE_CAP | GC.LINE_JOIN | GC.LINE_STYLE | GC.LINE_WIDTH);
+    //TODO outline
+    NSPoint point = new NSPoint();
+    point.x = x;
+    point.y = y;
+    return handle.containsPoint(point);
+}
+
+/**
+ * Adds to the receiver a cubic bezier curve based on the parameters.
+ *
+ * @param cx1 the x coordinate of the first control point of the spline
+ * @param cy1 the y coordinate of the first control of the spline
+ * @param cx2 the x coordinate of the second control of the spline
+ * @param cy2 the y coordinate of the second control of the spline
+ * @param x the x coordinate of the end point of the spline
+ * @param y the y coordinate of the end point of the spline
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void cubicTo(float cx1, float cy1, float cx2, float cy2, float x, float y) {
+    if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED);
+    NSPoint pt = new NSPoint();
+    pt.x = x;
+    pt.y = y;
+    NSPoint ct1 = new NSPoint();
+    ct1.x = cx1;
+    ct1.y = cy1;
+    NSPoint ct2 = new NSPoint();
+    ct2.x = cx2;
+    ct2.y = cy2;
+    handle.curveToPoint(pt, ct1, ct2);
+}
+
+void destroy() {
+    handle.release();
+    handle = null;
+}
+
+/**
+ * Replaces the first four elements in the parameter with values that
+ * describe the smallest rectangle that will completely contain the
+ * receiver (i.e. the bounding box).
+ *
+ * @param bounds the array to hold the result
+ * 
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the parameter is null</li>
+ *    <li>ERROR_INVALID_ARGUMENT - if the parameter is too small to hold the bounding box</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void getBounds(float[] bounds) {
+    if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED);
+    if (bounds is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
+    if (bounds.length < 4) DWT.error(DWT.ERROR_INVALID_ARGUMENT);
+    NSRect rect = handle.controlPointBounds();
+    bounds[0] = rect.x;
+    bounds[1] = rect.y;
+    bounds[2] = rect.width;
+    bounds[3] = rect.height;
+}
+
+/**
+ * Replaces the first two elements in the parameter with values that
+ * describe the current point of the path.
+ *
+ * @param point the array to hold the result
+ * 
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the parameter is null</li>
+ *    <li>ERROR_INVALID_ARGUMENT - if the parameter is too small to hold the end point</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void getCurrentPoint(float[] point) {
+    if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED);
+    if (point is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
+    if (point.length < 2) DWT.error(DWT.ERROR_INVALID_ARGUMENT);
+    NSPoint pt = handle.currentPoint();
+    point[0] = pt.x;
+    point[1] = pt.y;
+}
+
+/**
+ * Returns a device independent representation of the receiver.
+ * 
+ * @return the PathData for the receiver
+ * 
+ * @exception DWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ * 
+ * @see PathData
+ */
+public PathData getPathData() {
+    if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED);
+    int count = handle.elementCount();
+    int pointCount = 0, typeCount = 0;
+    byte[] types = new byte[count];
+    float[] pointArray = new float[count * 6];
+    int points = OS.malloc(3 * NSPoint.sizeof);
+    if (points is 0) DWT.error(DWT.ERROR_NO_HANDLES);
+    NSPoint pt = new NSPoint();
+    for (int i = 0; i < count; i++) {
+        int element = handle.elementAtIndex_associatedPoints_(i, points);
+        switch (element) {
+            case OS.NSMoveToBezierPathElement:
+                types[typeCount++] = DWT.PATH_MOVE_TO;
+                OS.memmove(pt, points, NSPoint.sizeof);
+                pointArray[pointCount++] = (int)pt.x;
+                pointArray[pointCount++] = (int)pt.y;
+                break;
+            case OS.NSLineToBezierPathElement:
+                types[typeCount++] = DWT.PATH_LINE_TO;
+                OS.memmove(pt, points, NSPoint.sizeof);
+                pointArray[pointCount++] = (int)pt.x;
+                pointArray[pointCount++] = (int)pt.y;
+                break;
+            case OS.NSCurveToBezierPathElement:
+                types[typeCount++] = DWT.PATH_CUBIC_TO;
+                OS.memmove(pt, points, NSPoint.sizeof);
+                pointArray[pointCount++] = (int)pt.x;
+                pointArray[pointCount++] = (int)pt.y;
+                OS.memmove(pt, points + NSPoint.sizeof, NSPoint.sizeof);
+                pointArray[pointCount++] = (int)pt.x;
+                pointArray[pointCount++] = (int)pt.y;
+                OS.memmove(pt, points + NSPoint.sizeof + NSPoint.sizeof, NSPoint.sizeof);
+                pointArray[pointCount++] = (int)pt.x;
+                pointArray[pointCount++] = (int)pt.y;
+                break;
+            case OS.NSClosePathBezierPathElement:
+                types[typeCount++] = DWT.PATH_CLOSE;
+                break;
+        }
+    }
+    OS.free(points);
+    if (pointCount !is pointArray.length) {
+        float[] temp = new float[pointCount];
+        System.arraycopy(pointArray, 0, temp, 0, pointCount);
+        pointArray = temp;
+    }
+    PathData data = new PathData();
+    data.types = types;
+    data.points = pointArray;
+    return data;
+}
+
+void init(PathData data) {
+    byte[] types = data.types;
+    float[] points = data.points;
+    for (int i = 0, j = 0; i < types.length; i++) {
+        switch (types[i]) {
+            case DWT.PATH_MOVE_TO:
+                moveTo(points[j++], points[j++]);
+                break;
+            case DWT.PATH_LINE_TO:
+                lineTo(points[j++], points[j++]);
+                break;
+            case DWT.PATH_CUBIC_TO:
+                cubicTo(points[j++], points[j++], points[j++], points[j++], points[j++], points[j++]);
+                break;
+            case DWT.PATH_QUAD_TO:
+                quadTo(points[j++], points[j++], points[j++], points[j++]);
+                break;
+            case DWT.PATH_CLOSE:
+                close();
+                break;
+            default:
+                dispose();
+                DWT.error(DWT.ERROR_INVALID_ARGUMENT);
+        }
+    }
+}
+
+/**
+ * Returns <code>true</code> if the Path has been disposed,
+ * and <code>false</code> otherwise.
+ * <p>
+ * This method gets the dispose state for the Path.
+ * When a Path has been disposed, it is an error to
+ * invoke any other method using the Path.
+ *
+ * @return <code>true</code> when the Path is disposed, and <code>false</code> otherwise
+ */
+public bool isDisposed() {
+    return handle is null;
+}
+
+/**
+ * Adds to the receiver a line from the current point to
+ * the point specified by (x, y).
+ *
+ * @param x the x coordinate of the end of the line to add
+ * @param y the y coordinate of the end of the line to add
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void lineTo(float x, float y) {
+    if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED);
+    NSPoint pt = new NSPoint();
+    pt.x = x;
+    pt.y = y;
+    handle.lineToPoint(pt);
+}
+
+/**
+ * Sets the current point of the receiver to the point
+ * specified by (x, y). Note that this starts a new
+ * sub path.
+ *
+ * @param x the x coordinate of the new end point
+ * @param y the y coordinate of the new end point
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void moveTo(float x, float y) {
+    if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED);
+    NSPoint pt = new NSPoint();
+    pt.x = x;
+    pt.y = y;
+    handle.moveToPoint(pt);
+
+}
+
+/**
+ * Adds to the receiver a quadratic curve based on the parameters.
+ *
+ * @param cx the x coordinate of the control point of the spline
+ * @param cy the y coordinate of the control point of the spline
+ * @param x the x coordinate of the end point of the spline
+ * @param y the y coordinate of the end point of the spline
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void quadTo(float cx, float cy, float x, float y) {
+    if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED);
+    NSPoint pt = new NSPoint();
+    pt.x = x;
+    pt.y = y;
+    NSPoint ct = new NSPoint();
+    ct.x = cx;
+    ct.y = cy;
+    handle.curveToPoint(pt, ct, ct);
+}
+
+/**
+ * Returns a string containing a concise, human-readable
+ * description of the receiver.
+ *
+ * @return a string representation of the receiver
+ */
+public String toString () {
+    if (isDisposed()) return "Path {*DISPOSED*}";
+    return "Path {" + handle + "}";
+}
+
+}