david_williams | cfdb2cd | 2004-11-11 08:37:49 +0000 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * Copyright (c) 2001, 2004 IBM Corporation and others. |
| 3 | * All rights reserved. This program and the accompanying materials |
| 4 | * are made available under the terms of the Eclipse Public License v1.0 |
| 5 | * which accompanies this distribution, and is available at |
| 6 | * http://www.eclipse.org/legal/epl-v10.html |
| 7 | * |
| 8 | * Contributors: |
| 9 | * IBM Corporation - initial API and implementation |
| 10 | * Jens Lukowski/Innoopract - initial renaming/restructuring |
| 11 | * |
| 12 | *******************************************************************************/ |
david_williams | f3680f0 | 2005-04-13 22:43:54 +0000 | [diff] [blame] | 13 | package org.eclipse.wst.sse.ui.internal; |
david_williams | cfdb2cd | 2004-11-11 08:37:49 +0000 | [diff] [blame] | 14 | |
david_williams | 76ae86b | 2005-04-20 00:29:00 +0000 | [diff] [blame] | 15 | import org.eclipse.jface.text.BadLocationException; |
| 16 | import org.eclipse.jface.text.IRegion; |
david_williams | cfdb2cd | 2004-11-11 08:37:49 +0000 | [diff] [blame] | 17 | import org.eclipse.jface.text.ITextViewer; |
| 18 | import org.eclipse.swt.custom.ST; |
| 19 | import org.eclipse.swt.custom.StyledText; |
| 20 | import org.eclipse.swt.dnd.DND; |
| 21 | import org.eclipse.swt.dnd.DropTargetAdapter; |
| 22 | import org.eclipse.swt.dnd.DropTargetEvent; |
| 23 | import org.eclipse.swt.dnd.FileTransfer; |
| 24 | import org.eclipse.swt.dnd.Transfer; |
| 25 | import org.eclipse.swt.dnd.TransferData; |
| 26 | import org.eclipse.swt.graphics.Color; |
| 27 | import org.eclipse.swt.graphics.GC; |
| 28 | import org.eclipse.swt.graphics.Point; |
| 29 | import org.eclipse.swt.graphics.Rectangle; |
| 30 | import org.eclipse.swt.widgets.Caret; |
nitind | 5089700 | 2005-06-03 20:33:54 +0000 | [diff] [blame] | 31 | import org.eclipse.ui.IEditorPart; |
nitind | 503fc09 | 2005-11-01 20:17:10 +0000 | [diff] [blame] | 32 | import org.eclipse.wst.sse.ui.internal.TransferBuilder.TransferProxyForDelayLoading; |
david_williams | cfdb2cd | 2004-11-11 08:37:49 +0000 | [diff] [blame] | 33 | |
| 34 | /** |
| 35 | * ExtendedEditorDropTargetAdapter |
| 36 | */ |
| 37 | public class ExtendedEditorDropTargetAdapter extends DropTargetAdapter { |
| 38 | |
| 39 | private Point caret = null; |
| 40 | private String[] editorIds; |
| 41 | private int orgOffset = 0; |
nitind | 5089700 | 2005-06-03 20:33:54 +0000 | [diff] [blame] | 42 | private IEditorPart targetEditor = null; |
david_williams | cfdb2cd | 2004-11-11 08:37:49 +0000 | [diff] [blame] | 43 | private ITextViewer textViewer = null; |
| 44 | |
| 45 | private Transfer[] transfers = null; |
| 46 | |
nitind | 503fc09 | 2005-11-01 20:17:10 +0000 | [diff] [blame] | 47 | private boolean useProxy; |
| 48 | |
| 49 | /** |
| 50 | * @deprecated use ExtendedEditorDropTargetAdapter(boolean useProxy) for |
| 51 | * the performance |
| 52 | */ |
david_williams | cfdb2cd | 2004-11-11 08:37:49 +0000 | [diff] [blame] | 53 | public ExtendedEditorDropTargetAdapter() { |
nitind | 503fc09 | 2005-11-01 20:17:10 +0000 | [diff] [blame] | 54 | this(false); |
| 55 | } |
| 56 | |
| 57 | public ExtendedEditorDropTargetAdapter(boolean useProxy) { |
david_williams | cfdb2cd | 2004-11-11 08:37:49 +0000 | [diff] [blame] | 58 | super(); |
nitind | 503fc09 | 2005-11-01 20:17:10 +0000 | [diff] [blame] | 59 | this.useProxy = useProxy; |
david_williams | cfdb2cd | 2004-11-11 08:37:49 +0000 | [diff] [blame] | 60 | } |
| 61 | |
| 62 | protected boolean doDrop(Transfer transfer, DropTargetEvent event) { |
nitind | 503fc09 | 2005-11-01 20:17:10 +0000 | [diff] [blame] | 63 | TransferBuilder tb = new TransferBuilder(useProxy); |
david_williams | cfdb2cd | 2004-11-11 08:37:49 +0000 | [diff] [blame] | 64 | |
| 65 | IDropAction[] as = null; |
| 66 | if (editorIds != null && editorIds.length > 0) |
nitind | 503fc09 | 2005-11-01 20:17:10 +0000 | [diff] [blame] | 67 | as = tb.getDropActions(editorIds, transfer); |
david_williams | cfdb2cd | 2004-11-11 08:37:49 +0000 | [diff] [blame] | 68 | else |
nitind | 503fc09 | 2005-11-01 20:17:10 +0000 | [diff] [blame] | 69 | as = tb.getDropActions(getTargetEditor().getClass().getName(), transfer); |
david_williams | cfdb2cd | 2004-11-11 08:37:49 +0000 | [diff] [blame] | 70 | |
| 71 | for (int i = 0; i < as.length; ++i) { |
| 72 | IDropAction da = as[i]; |
nitind | 503fc09 | 2005-11-01 20:17:10 +0000 | [diff] [blame] | 73 | Transfer actualTransfer; |
| 74 | if (transfer instanceof TransferProxyForDelayLoading) { |
| 75 | actualTransfer = ((TransferProxyForDelayLoading) transfer).getTransferClass(); |
| 76 | } |
| 77 | else { |
| 78 | actualTransfer = transfer; |
| 79 | } |
| 80 | if (actualTransfer instanceof FileTransfer) { |
david_williams | cfdb2cd | 2004-11-11 08:37:49 +0000 | [diff] [blame] | 81 | if (event.data == null) { |
| 82 | Logger.log(Logger.ERROR, "No data in DropTargetEvent from " + event.widget); //$NON-NLS-1$ |
| 83 | return false; |
| 84 | } |
| 85 | String[] strs = (String[]) event.data; |
| 86 | boolean[] bs = new boolean[strs.length]; |
| 87 | int c = 0; |
| 88 | for (int j = 0; j < strs.length; ++j) { |
| 89 | bs[j] = false; |
| 90 | if (da.isSupportedData(strs[j])) { |
| 91 | event.data = new String[]{strs[j]}; |
| 92 | if (!da.run(event, targetEditor)) { |
| 93 | bs[j] = true; |
| 94 | c++; |
| 95 | } |
| 96 | } else { |
| 97 | bs[j] = true; |
| 98 | c++; |
| 99 | } |
| 100 | } |
| 101 | if (c == 0) { |
| 102 | return true; |
| 103 | } |
| 104 | |
| 105 | int k = 0; |
| 106 | String[] rests = new String[c]; |
| 107 | for (int j = 0; j < strs.length; ++j) { |
| 108 | if (bs[j]) |
| 109 | rests[k++] = strs[j]; |
| 110 | } |
| 111 | event.data = rests; |
| 112 | } else if (da.isSupportedData(event.data)) { |
| 113 | if (da.run(event, targetEditor)) { |
| 114 | return true; |
| 115 | } |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | return false; |
| 120 | } |
| 121 | |
| 122 | /** |
| 123 | */ |
| 124 | public void dragEnter(DropTargetEvent event) { |
| 125 | caret = null; |
| 126 | TransferData data = null; |
| 127 | Transfer[] ts = getTransfers(); |
| 128 | for (int i = 0; i < ts.length; i++) { |
| 129 | for (int j = 0; j < event.dataTypes.length; j++) { |
| 130 | if (ts[i].isSupportedType(event.dataTypes[j])) { |
| 131 | data = event.dataTypes[j]; |
| 132 | break; |
| 133 | } |
| 134 | } |
| 135 | if (data != null) { |
| 136 | event.currentDataType = data; |
| 137 | break; |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | if (textViewer != null) { |
| 142 | orgOffset = textViewer.getTextWidget().getCaretOffset(); |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | public void dragLeave(DropTargetEvent event) { |
| 147 | if (textViewer != null) { |
| 148 | StyledText st = textViewer.getTextWidget(); |
| 149 | st.setCaretOffset(orgOffset); |
| 150 | st.redraw(); |
| 151 | st.update(); |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | /** |
| 156 | */ |
| 157 | public void dragOver(DropTargetEvent event) { |
| 158 | event.operations &= ~DND.DROP_MOVE; |
| 159 | event.detail = DND.DROP_COPY; |
| 160 | |
| 161 | if (textViewer != null) { |
| 162 | Point pt = toControl(new Point(event.x, event.y)); |
| 163 | StyledText st = textViewer.getTextWidget(); |
| 164 | |
| 165 | // auto scroll |
| 166 | Rectangle ca = st.getClientArea(); |
| 167 | int margin = st.getLineHeight(); |
| 168 | |
| 169 | if (pt.y < margin) { // up |
| 170 | st.invokeAction(ST.LINE_UP); |
| 171 | } else if (pt.y > ca.height - margin) { // down |
| 172 | st.invokeAction(ST.LINE_DOWN); |
| 173 | } |
| 174 | |
| 175 | // draw insertion point |
| 176 | int offset = getDropOffset(st, pt); |
| 177 | if (offset != st.getCaretOffset()) { |
| 178 | st.setCaretOffset(offset); |
| 179 | st.setSelection(offset); |
| 180 | } |
| 181 | |
| 182 | Point newCaret = st.getLocationAtOffset(offset); |
| 183 | if (newCaret.equals(caret)) |
| 184 | return; |
| 185 | |
| 186 | Caret ct = st.getCaret(); |
| 187 | Point size = ct.getSize(); |
| 188 | |
| 189 | GC gc = new GC(st); |
david_williams | cfdb2cd | 2004-11-11 08:37:49 +0000 | [diff] [blame] | 190 | gc.setLineWidth(size.x); |
| 191 | |
| 192 | // erase old caret |
| 193 | if (caret != null) { |
| 194 | Color originalForeground = gc.getForeground(); |
| 195 | gc.setForeground(st.getBackground()); |
nitind | 503fc09 | 2005-11-01 20:17:10 +0000 | [diff] [blame] | 196 | gc.drawRectangle(caret.x, caret.y, size.x, size.y); |
david_williams | cfdb2cd | 2004-11-11 08:37:49 +0000 | [diff] [blame] | 197 | gc.setForeground(originalForeground); |
| 198 | } |
| 199 | |
| 200 | st.redraw(); |
| 201 | st.update(); |
| 202 | |
| 203 | // draw new caret |
| 204 | caret = newCaret; |
| 205 | if (ct.getImage() != null) |
| 206 | gc.drawImage(ct.getImage(), caret.x, caret.y); |
nitind | 503fc09 | 2005-11-01 20:17:10 +0000 | [diff] [blame] | 207 | else { |
david_williams | cfdb2cd | 2004-11-11 08:37:49 +0000 | [diff] [blame] | 208 | gc.drawLine(caret.x, caret.y, caret.x, caret.y + size.y); |
nitind | 503fc09 | 2005-11-01 20:17:10 +0000 | [diff] [blame] | 209 | } |
david_williams | cfdb2cd | 2004-11-11 08:37:49 +0000 | [diff] [blame] | 210 | |
| 211 | gc.dispose(); |
| 212 | } |
| 213 | } |
| 214 | |
| 215 | /** |
| 216 | */ |
| 217 | public void drop(DropTargetEvent event) { |
| 218 | if (event.operations == DND.DROP_NONE) |
| 219 | return; |
| 220 | |
| 221 | if (textViewer != null) { |
| 222 | Point pt = toControl(new Point(event.x, event.y)); |
| 223 | StyledText st = textViewer.getTextWidget(); |
| 224 | |
| 225 | int offset = getDropOffset(st, pt); |
| 226 | if (offset != st.getCaretOffset()) { |
| 227 | st.setCaretOffset(offset); |
| 228 | } |
| 229 | |
david_williams | 76ae86b | 2005-04-20 00:29:00 +0000 | [diff] [blame] | 230 | // ISelectionProvider sp = textViewer.getSelectionProvider(); |
| 231 | // ISelection sel = new TextSelection(offset, 0); |
| 232 | // sp.setSelection(sel); |
david_williams | cfdb2cd | 2004-11-11 08:37:49 +0000 | [diff] [blame] | 233 | textViewer.setSelectedRange(offset, 0); |
| 234 | } |
| 235 | |
| 236 | Transfer[] ts = getTransfers(); |
| 237 | for (int i = 0; i < ts.length; i++) { |
| 238 | if (ts[i].isSupportedType(event.currentDataType)) { |
| 239 | if (doDrop(ts[i], event)) { |
| 240 | break; |
| 241 | } |
| 242 | } |
| 243 | } |
| 244 | } |
| 245 | |
| 246 | protected int getDropOffset(DropTargetEvent event) { |
| 247 | Point pt = getTextViewer().getTextWidget().toControl(new Point(event.x, event.y)); |
| 248 | StyledText st = textViewer.getTextWidget(); |
| 249 | return getDropOffset(st, pt); |
| 250 | } |
| 251 | |
| 252 | private int getDropOffset(StyledText st, Point pt) { |
| 253 | int offset = st.getCaretOffset(); |
| 254 | try { |
| 255 | offset = st.getOffsetAtLocation(pt); |
| 256 | } catch (IllegalArgumentException e) { |
| 257 | // This is normal case if mouse cursor is on outside of valid |
| 258 | // text. |
| 259 | boolean found = false; |
| 260 | Point p = new Point((pt.x > 0 ? pt.x : 0), pt.y); |
| 261 | // search nearest character |
| 262 | for (; p.x > -1; p.x--) { |
| 263 | try { |
david_williams | 76ae86b | 2005-04-20 00:29:00 +0000 | [diff] [blame] | 264 | offset = st.getOffsetAtLocation(p); |
| 265 | |
| 266 | /* |
| 267 | * Now that a valid offset has been found, try to place at |
| 268 | * the end of the line |
| 269 | */ |
| 270 | if (textViewer != null && textViewer.getDocument() != null) { |
| 271 | IRegion lineInfo = null; |
| 272 | try { |
| 273 | lineInfo = textViewer.getDocument().getLineInformationOfOffset(offset); |
| 274 | } catch (BadLocationException e1) { |
| 275 | } |
| 276 | if (lineInfo != null) |
| 277 | offset = lineInfo.getOffset() + lineInfo.getLength(); |
| 278 | } |
| 279 | |
david_williams | cfdb2cd | 2004-11-11 08:37:49 +0000 | [diff] [blame] | 280 | found = true; |
| 281 | break; |
| 282 | } catch (IllegalArgumentException ex) { |
| 283 | } |
| 284 | } |
| 285 | |
| 286 | if (!found) { |
| 287 | offset = st.getCharCount(); |
| 288 | } |
| 289 | } |
| 290 | return offset; |
| 291 | } |
| 292 | |
nitind | 5089700 | 2005-06-03 20:33:54 +0000 | [diff] [blame] | 293 | public IEditorPart getTargetEditor() { |
david_williams | cfdb2cd | 2004-11-11 08:37:49 +0000 | [diff] [blame] | 294 | return targetEditor; |
| 295 | } |
| 296 | |
| 297 | public ITextViewer getTextViewer() { |
| 298 | return textViewer; |
| 299 | } |
| 300 | |
| 301 | /** |
| 302 | * @return org.eclipse.swt.dnd.Transfer[] |
| 303 | */ |
| 304 | public Transfer[] getTransfers() { |
| 305 | if (transfers == null) { |
nitind | 503fc09 | 2005-11-01 20:17:10 +0000 | [diff] [blame] | 306 | TransferBuilder tb = new TransferBuilder(useProxy); |
david_williams | cfdb2cd | 2004-11-11 08:37:49 +0000 | [diff] [blame] | 307 | if (editorIds == null || editorIds.length == 0) |
| 308 | transfers = tb.getDropTargetTransfers(getTargetEditor().getClass().getName()); |
| 309 | else |
| 310 | transfers = tb.getDropTargetTransfers(editorIds); |
| 311 | } |
| 312 | return transfers; |
| 313 | } |
| 314 | |
| 315 | /** |
| 316 | */ |
nitind | 5089700 | 2005-06-03 20:33:54 +0000 | [diff] [blame] | 317 | public void setTargetEditor(IEditorPart targetEditor) { |
david_williams | cfdb2cd | 2004-11-11 08:37:49 +0000 | [diff] [blame] | 318 | this.targetEditor = targetEditor; |
| 319 | } |
| 320 | |
| 321 | public void setTargetIDs(String[] ids) { |
| 322 | editorIds = ids; |
| 323 | } |
| 324 | |
| 325 | public void setTextViewer(ITextViewer textViewer) { |
| 326 | this.textViewer = textViewer; |
| 327 | } |
| 328 | |
| 329 | private Point toControl(Point point) { |
| 330 | return (textViewer != null ? textViewer.getTextWidget().toControl(point) : point); |
| 331 | } |
| 332 | } |