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1
19
20 package org.netbeans.modules.editor.completion;
21
22 import java.awt.*;
23 import java.awt.event.MouseListener  ;
24 import java.util.Collections ;
25 import java.util.List ;
26 import javax.swing.*;
27
28 import org.netbeans.editor.LocaleSupport;
29 import org.netbeans.spi.editor.completion.CompletionItem;
30
31
35
36 public class CompletionJList extends JList {
37
38 private static final int DARKER_COLOR_COMPONENT = 5;
39
40 private final RenderComponent renderComponent;
41
42 private Graphics cellPreferredSizeGraphics;
43
44 private int fixedItemHeight;
45 private int maxVisibleRowCount;
46 private int smartIndex;
47
48 public CompletionJList(int maxVisibleRowCount, MouseListener mouseListener) {
49 this.maxVisibleRowCount = maxVisibleRowCount;
50 addMouseListener(mouseListener);
51 setLayoutOrientation(JList.VERTICAL);
52 setFixedCellHeight(fixedItemHeight = Math.max(CompletionLayout.COMPLETION_ITEM_HEIGHT, getFontMetrics(getFont()).getHeight()));
53 setModel(new Model(Collections.EMPTY_LIST));
54 setFocusable(false);
55
56 renderComponent = new RenderComponent();
57 setSelectionMode(javax.swing.ListSelectionModel.SINGLE_SELECTION);
58 setCellRenderer(new ListCellRenderer() {
59 private ListCellRenderer defaultRenderer = new DefaultListCellRenderer();
60
61 public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
62 if( value instanceof CompletionItem ) {
63 CompletionItem item = (CompletionItem)value;
64 renderComponent.setItem(item);
65 renderComponent.setSelected(isSelected);
66 renderComponent.setSeparator(smartIndex > 0 && smartIndex == index);
67 Color bgColor;
68 Color fgColor;
69 if (isSelected) {
70 bgColor = list.getSelectionBackground();
71 fgColor = list.getSelectionForeground();
72 } else { bgColor = list.getBackground();
74 if ((index % 2) == 0) { bgColor = new Color(
76 Math.abs(bgColor.getRed() - DARKER_COLOR_COMPONENT),
77 Math.abs(bgColor.getGreen() - DARKER_COLOR_COMPONENT),
78 Math.abs(bgColor.getBlue() - DARKER_COLOR_COMPONENT)
79 );
80 }
81 fgColor = list.getForeground();
82 }
83 if (renderComponent.getBackground() != bgColor) {
85 renderComponent.setBackground(bgColor);
86 }
87 if (renderComponent.getForeground() != fgColor) {
88 renderComponent.setForeground(fgColor);
89 }
90 return renderComponent;
91
92 } else {
93 return defaultRenderer.getListCellRendererComponent( list, value, index, isSelected, cellHasFocus);
94 }
95 }
96 });
97 getAccessibleContext().setAccessibleName(LocaleSupport.getString("ACSN_CompletionView"));
98 getAccessibleContext().setAccessibleDescription(LocaleSupport.getString("ACSD_CompletionView"));
99 }
100
101 void setData(List data) {
102 smartIndex = -1;
103 if (data != null) {
104 int itemCount = data.size();
105 ListModel lm = LazyListModel.create( new Model(data), CompletionImpl.filter, 1.0d, LocaleSupport.getString("completion-please-wait") ); ListCellRenderer renderer = getCellRenderer();
107 int lmSize = lm.getSize();
108 int width = 0;
109 int maxWidth = getParent().getParent().getMaximumSize().width;
110 boolean stop = false;
111 for(int index = 0; index < lmSize; index++) {
112 Object value = lm.getElementAt(index);
113 Component c = renderer.getListCellRendererComponent(this, value, index, false, false);
114 Dimension cellSize = c.getPreferredSize();
115 if (cellSize.width > width) {
116 width = cellSize.width;
117 if (width >= maxWidth)
118 stop = true;
119 }
120 if (smartIndex < 0 && value instanceof CompletionItem && ((CompletionItem)value).getSortPriority() >= 0)
121 smartIndex = index;
122 if (stop && smartIndex >= 0)
123 break;
124 }
125 setFixedCellWidth(width);
126 setModel(lm);
127
128 if (itemCount > 0) {
129 setSelectedIndex(0);
130 }
131 int visibleRowCount = Math.min(itemCount, maxVisibleRowCount);
132 setVisibleRowCount(visibleRowCount);
133 }
134 }
135
136 public void up() {
137 int size = getModel().getSize();
138 if (size > 0) {
139 int idx = (getSelectedIndex() - 1 + size) % size;
140 while(idx > 0 && getModel().getElementAt(idx) == null)
141 idx--;
142 setSelectedIndex(idx);
143 ensureIndexIsVisible(idx);
144 }
145 }
146
147 public void down() {
148 int size = getModel().getSize();
149 if (size > 0) {
150 int idx = (getSelectedIndex() + 1) % size;
151 while(idx < size && getModel().getElementAt(idx) == null)
152 idx++;
153 if (idx == size)
154 idx = 0;
155 setSelectedIndex(idx);
156 ensureIndexIsVisible(idx);
157 }
158 }
159
160 public void pageUp() {
161 if (getModel().getSize() > 0) {
162 int pageSize = Math.max(getLastVisibleIndex() - getFirstVisibleIndex(), 0);
163 int idx = Math.max(getSelectedIndex() - pageSize, 0);
164 while(idx > 0 && getModel().getElementAt(idx) == null)
165 idx--;
166 setSelectedIndex(idx);
167 ensureIndexIsVisible(idx);
168 }
169 }
170
171 public void pageDown() {
172 int size = getModel().getSize();
173 if (size > 0) {
174 int pageSize = Math.max(getLastVisibleIndex() - getFirstVisibleIndex(), 0);
175 int idx = Math.min(getSelectedIndex() + pageSize, size - 1);
176 while(idx < size && getModel().getElementAt(idx) == null)
177 idx++;
178 if (idx == size) {
179 idx = Math.min(getSelectedIndex() + pageSize, size - 1);
180 while(idx > 0 && getModel().getElementAt(idx) == null)
181 idx--;
182 }
183 setSelectedIndex(idx);
184 ensureIndexIsVisible(idx);
185 }
186 }
187
188 public void begin() {
189 if (getModel().getSize() > 0) {
190 setSelectedIndex(0);
191 ensureIndexIsVisible(0);
192 }
193 }
194
195 public void end() {
196 int size = getModel().getSize();
197 if (size > 0) {
198 int idx = size - 1;
199 while(idx > 0 && getModel().getElementAt(idx) == null)
200 idx--;
201 setSelectedIndex(idx);
202 ensureIndexIsVisible(idx);
203 }
204 }
205
206 private final class Model extends AbstractListModel {
207
208 List data;
209
210 public Model(List data) {
211 this.data = data;
212 }
213
214 public int getSize() {
215 return data.size();
216 }
217
218 public Object getElementAt(int index) {
219 return (index >= 0 && index < data.size()) ? data.get(index) : null;
220 }
221 }
222
223 private final class RenderComponent extends JComponent {
224
225 private CompletionItem item;
226
227 private boolean selected;
228 private boolean separator;
229
230 void setItem(CompletionItem item) {
231 this.item = item;
232 }
233
234 void setSelected(boolean selected) {
235 this.selected = selected;
236 }
237
238 void setSeparator(boolean separator) {
239 this.separator = separator;
240 }
241
242 public void paintComponent(Graphics g) {
243 int itemRenderWidth = ((JViewport)CompletionJList.this.getParent()).getWidth();
250 Color bgColor = getBackground();
251 Color fgColor = getForeground();
252 int height = getHeight();
253
254 g.setColor(bgColor);
256 g.fillRect(0, 0, itemRenderWidth, height);
257 g.setColor(fgColor);
258
259 item.render(g, CompletionJList.this.getFont(), getForeground(), bgColor,
261 itemRenderWidth, getHeight(), selected);
262
263 if (separator) {
264 g.setColor(Color.gray);
265 g.drawLine(0, 0, itemRenderWidth, 0);
266 g.setColor(fgColor);
267 }
268 }
269
270 public Dimension getPreferredSize() {
271 if (cellPreferredSizeGraphics == null) {
272 cellPreferredSizeGraphics = java.awt.GraphicsEnvironment.
274 getLocalGraphicsEnvironment().getDefaultScreenDevice().
275 getDefaultConfiguration().createCompatibleImage(1, 1).getGraphics();
276 assert (cellPreferredSizeGraphics != null);
277 }
278 return new Dimension(item.getPreferredWidth(cellPreferredSizeGraphics, CompletionJList.this.getFont()),
279 fixedItemHeight);
280 }
281
282 }
283
284 }
285 |
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