1
2 /*
3 ****************************************************************************** *
4 *
5 * Copyright (C) 1999-2007, International Business Machines
6 * Corporation and others. All Rights Reserved.
7 *
8 ****************************************************************************** *
9 * file name: gnomelayout.cpp
10 *
11 * created on: 09/04/2001
12 * created by: Eric R. Mader
13 */
14
15 #include <gnome.h>
16 #include <ft2build.h>
17 #include FT_FREETYPE_H
18
19 #include "unicode/ustring.h"
20 #include "unicode/uscript.h"
21
22 #include "GnomeFontInstance.h"
23
24 #include "paragraph.h"
25
26 #include "GnomeGUISupport.h"
27 #include "GnomeFontMap.h"
28 #include "UnicodeReader.h"
29 #include "ScriptCompositeFontInstance.h"
30
31 #define ARRAY_LENGTH(array) (sizeof array / sizeof array[0])
32
33 struct Context
34 {
35 long width;
36 long height;
37 Paragraph *paragraph;
38 };
39
40 static FT_Library engine;
41 static GnomeGUISupport *guiSupport;
42 static GnomeFontMap *fontMap;
43 static ScriptCompositeFontInstance *font;
44
45 static GSList *appList = NULL;
46
47 GtkWidget *newSample(const gchar *fileName);
48 void closeSample(GtkWidget *sample);
49
showabout(GtkWidget *,gpointer)50 void showabout(GtkWidget */*widget*/, gpointer /*data*/)
51 {
52 GtkWidget *aboutBox;
53 const gchar *documentedBy[] = {NULL};
54 const gchar *writtenBy[] = {
55 "Eric Mader",
56 NULL
57 };
58
59 aboutBox = gnome_about_new("Gnome Layout Sample",
60 "0.1",
61 "Copyright (C) 1998-2006 By International Business Machines Corporation and others. All Rights Reserved.",
62 "A simple demo of the ICU LayoutEngine.",
63 writtenBy,
64 documentedBy,
65 "",
66 NULL);
67
68 gtk_widget_show(aboutBox);
69 }
70
notimpl(GtkObject *,gpointer)71 void notimpl(GtkObject */*object*/, gpointer /*data*/)
72 {
73 gnome_ok_dialog("Not implemented...");
74 }
75
prettyTitle(const gchar * path)76 gchar *prettyTitle(const gchar *path)
77 {
78 const gchar *name = g_basename(path);
79 gchar *title = g_strconcat("Gnome Layout Sample - ", name, NULL);
80
81 return title;
82 }
83
openOK(GtkObject *,gpointer data)84 void openOK(GtkObject */*object*/, gpointer data)
85 {
86 GtkFileSelection *fileselection = GTK_FILE_SELECTION(data);
87 GtkWidget *app = GTK_WIDGET(gtk_object_get_data(GTK_OBJECT(fileselection), "app"));
88 Context *context = (Context *) gtk_object_get_data(GTK_OBJECT(app), "context");
89 gchar *fileName = g_strdup(gtk_file_selection_get_filename(fileselection));
90 Paragraph *newPara;
91
92 gtk_widget_destroy(GTK_WIDGET(fileselection));
93
94 newPara = Paragraph::paragraphFactory(fileName, font, guiSupport);
95
96 if (newPara != NULL) {
97 gchar *title = prettyTitle(fileName);
98 GtkWidget *area = GTK_WIDGET(gtk_object_get_data(GTK_OBJECT(app), "area"));
99
100 if (context->paragraph != NULL) {
101 delete context->paragraph;
102 }
103
104 context->paragraph = newPara;
105 gtk_window_set_title(GTK_WINDOW(app), title);
106
107 gtk_widget_hide(area);
108 context->paragraph->breakLines(context->width, context->height);
109 gtk_widget_show_all(area);
110
111 g_free(title);
112 }
113
114 g_free(fileName);
115 }
116
openfile(GtkObject *,gpointer data)117 void openfile(GtkObject */*object*/, gpointer data)
118 {
119 GtkWidget *app = GTK_WIDGET(data);
120 GtkWidget *fileselection;
121 GtkWidget *okButton;
122 GtkWidget *cancelButton;
123
124 fileselection =
125 gtk_file_selection_new("Open File");
126
127 gtk_object_set_data(GTK_OBJECT(fileselection), "app", app);
128
129 okButton =
130 GTK_FILE_SELECTION(fileselection)->ok_button;
131
132 cancelButton =
133 GTK_FILE_SELECTION(fileselection)->cancel_button;
134
135 gtk_signal_connect(GTK_OBJECT(fileselection), "destroy",
136 GTK_SIGNAL_FUNC(gtk_main_quit), NULL);
137
138 gtk_signal_connect(GTK_OBJECT(okButton), "clicked",
139 GTK_SIGNAL_FUNC(openOK), fileselection);
140
141 gtk_signal_connect_object(GTK_OBJECT(cancelButton), "clicked",
142 GTK_SIGNAL_FUNC(gtk_widget_destroy), GTK_OBJECT(fileselection));
143
144 gtk_window_set_modal(GTK_WINDOW(fileselection), TRUE);
145 gtk_widget_show(fileselection);
146 gtk_main();
147 }
148
newapp(GtkObject *,gpointer)149 void newapp(GtkObject */*object*/, gpointer /*data*/)
150 {
151 GtkWidget *app = newSample("Sample.txt");
152
153 gtk_widget_show_all(app);
154 }
155
closeapp(GtkWidget *,gpointer data)156 void closeapp(GtkWidget */*widget*/, gpointer data)
157 {
158 GtkWidget *app = GTK_WIDGET(data);
159
160 closeSample(app);
161 }
162
shutdown(GtkObject *,gpointer)163 void shutdown(GtkObject */*object*/, gpointer /*data*/)
164 {
165 gtk_main_quit();
166 }
167
168 GnomeUIInfo fileMenu[] =
169 {
170 GNOMEUIINFO_MENU_NEW_ITEM((gchar *) "_New Sample",
171 (gchar *) "Create a new Gnome Layout Sample",
172 newapp, NULL),
173
174 GNOMEUIINFO_MENU_OPEN_ITEM(openfile, NULL),
175 GNOMEUIINFO_SEPARATOR,
176 GNOMEUIINFO_MENU_CLOSE_ITEM(closeapp, NULL),
177 GNOMEUIINFO_MENU_EXIT_ITEM(shutdown, NULL),
178 GNOMEUIINFO_END
179 };
180
181 GnomeUIInfo helpMenu[] =
182 {
183 // GNOMEUIINFO_HELP("gnomelayout"),
184 GNOMEUIINFO_MENU_ABOUT_ITEM(showabout, NULL),
185 GNOMEUIINFO_END
186 };
187
188 GnomeUIInfo mainMenu[] =
189 {
190 GNOMEUIINFO_SUBTREE(N_((gchar *) "File"), fileMenu),
191 GNOMEUIINFO_SUBTREE(N_((gchar *) "Help"), helpMenu),
192 GNOMEUIINFO_END
193 };
194
eventDelete(GtkWidget * widget,GdkEvent *,gpointer)195 gint eventDelete(GtkWidget *widget, GdkEvent */*event*/, gpointer /*data*/)
196 {
197 closeSample(widget);
198
199 // indicate that closeapp already destroyed the window
200 return TRUE;
201 }
202
eventConfigure(GtkWidget *,GdkEventConfigure * event,Context * context)203 gint eventConfigure(GtkWidget */*widget*/, GdkEventConfigure *event, Context *context)
204 {
205 if (context->paragraph != NULL) {
206 context->width = event->width;
207 context->height = event->height;
208
209 if (context->width > 0 && context->height > 0) {
210 context->paragraph->breakLines(context->width, context->height);
211 }
212 }
213
214 return TRUE;
215 }
216
eventExpose(GtkWidget * widget,GdkEvent *,Context * context)217 gint eventExpose(GtkWidget *widget, GdkEvent */*event*/, Context *context)
218 {
219 if (context->paragraph != NULL) {
220 gint maxLines = context->paragraph->getLineCount() - 1;
221 gint firstLine = 0, lastLine = context->height / context->paragraph->getLineHeight();
222 GnomeSurface surface(widget);
223
224 context->paragraph->draw(&surface, firstLine, (maxLines < lastLine)? maxLines : lastLine);
225 }
226
227 return TRUE;
228 }
229
newSample(const gchar * fileName)230 GtkWidget *newSample(const gchar *fileName)
231 {
232 Context *context = new Context();
233
234 context->width = 600;
235 context->height = 400;
236 context->paragraph = Paragraph::paragraphFactory(fileName, font, guiSupport);
237
238 gchar *title = prettyTitle(fileName);
239 GtkWidget *app = gnome_app_new("gnomeLayout", title);
240
241 gtk_object_set_data(GTK_OBJECT(app), "context", context);
242
243 gtk_window_set_default_size(GTK_WINDOW(app), 600 - 24, 400);
244
245 gnome_app_create_menus_with_data(GNOME_APP(app), mainMenu, app);
246
247 gtk_signal_connect(GTK_OBJECT(app), "delete_event",
248 GTK_SIGNAL_FUNC(eventDelete), NULL);
249
250 GtkWidget *area = gtk_drawing_area_new();
251 gtk_object_set_data(GTK_OBJECT(app), "area", area);
252
253 GtkStyle *style = gtk_style_copy(gtk_widget_get_style(area));
254
255 for (int i = 0; i < 5; i += 1) {
256 style->fg[i] = style->white;
257 }
258
259 gtk_widget_set_style(area, style);
260
261 gnome_app_set_contents(GNOME_APP(app), area);
262
263 gtk_signal_connect(GTK_OBJECT(area),
264 "expose_event",
265 GTK_SIGNAL_FUNC(eventExpose),
266 context);
267
268 gtk_signal_connect(GTK_OBJECT(area),
269 "configure_event",
270 GTK_SIGNAL_FUNC(eventConfigure),
271 context);
272
273 appList = g_slist_prepend(appList, app);
274
275 g_free(title);
276
277 return app;
278 }
279
closeSample(GtkWidget * app)280 void closeSample(GtkWidget *app)
281 {
282 Context *context = (Context *) gtk_object_get_data(GTK_OBJECT(app), "context");
283
284 if (context->paragraph != NULL) {
285 delete context->paragraph;
286 }
287
288 delete context;
289
290 appList = g_slist_remove(appList, app);
291
292 gtk_widget_destroy(app);
293
294 if (appList == NULL) {
295 gtk_main_quit();
296 }
297 }
298
main(int argc,char * argv[])299 int main (int argc, char *argv[])
300 {
301 LEErrorCode fontStatus = LE_NO_ERROR;
302 poptContext ptctx;
303 GtkWidget *app;
304
305 FT_Init_FreeType(&engine);
306
307 gnome_init_with_popt_table("gnomelayout", "0.1", argc, argv, NULL, 0, &ptctx);
308
309 guiSupport = new GnomeGUISupport();
310 fontMap = new GnomeFontMap(engine, "FontMap.Gnome", 24, guiSupport, fontStatus);
311 font = new ScriptCompositeFontInstance(fontMap);
312
313 if (LE_FAILURE(fontStatus)) {
314 FT_Done_FreeType(engine);
315 return 1;
316 }
317
318 const char *defaultArgs[] = {"Sample.txt", NULL};
319 const char **args = poptGetArgs(ptctx);
320
321 if (args == NULL) {
322 args = defaultArgs;
323 }
324
325 for (int i = 0; args[i] != NULL; i += 1) {
326 app = newSample(args[i]);
327
328 gtk_widget_show_all(app);
329 }
330
331 poptFreeContext(ptctx);
332
333 gtk_main();
334
335 delete font;
336 delete guiSupport;
337
338 FT_Done_FreeType(engine);
339
340 exit(0);
341 }
342