1
2 /*
3 *******************************************************************************
4 *
5 * © 2016 and later: Unicode, Inc. and others.
6 * License & terms of use: http://www.unicode.org/copyright.html
7 *
8 *******************************************************************************
9 ****************************************************************************** *
10 *
11 * Copyright (C) 1999-2007, International Business Machines
12 * Corporation and others. All Rights Reserved.
13 *
14 ****************************************************************************** *
15 * file name: gnomelayout.cpp
16 *
17 * created on: 09/04/2001
18 * created by: Eric R. Mader
19 */
20
21 #include <gnome.h>
22 #include <ft2build.h>
23 #include FT_FREETYPE_H
24
25 #include "unicode/ustring.h"
26 #include "unicode/uscript.h"
27
28 #include "GnomeFontInstance.h"
29
30 #include "paragraph.h"
31
32 #include "GnomeGUISupport.h"
33 #include "GnomeFontMap.h"
34 #include "UnicodeReader.h"
35 #include "ScriptCompositeFontInstance.h"
36
37 #define ARRAY_LENGTH(array) (sizeof array / sizeof array[0])
38
39 struct Context
40 {
41 long width;
42 long height;
43 Paragraph *paragraph;
44 };
45
46 static FT_Library engine;
47 static GnomeGUISupport *guiSupport;
48 static GnomeFontMap *fontMap;
49 static ScriptCompositeFontInstance *font;
50
51 static GSList *appList = NULL;
52
53 GtkWidget *newSample(const gchar *fileName);
54 void closeSample(GtkWidget *sample);
55
showabout(GtkWidget *,gpointer)56 void showabout(GtkWidget */*widget*/, gpointer /*data*/)
57 {
58 GtkWidget *aboutBox;
59 const gchar *documentedBy[] = {NULL};
60 const gchar *writtenBy[] = {
61 "Eric Mader",
62 NULL
63 };
64
65 aboutBox = gnome_about_new("Gnome Layout Sample",
66 "0.1",
67 "Copyright (C) 1998-2006 By International Business Machines Corporation and others. All Rights Reserved.",
68 "A simple demo of the ICU LayoutEngine.",
69 writtenBy,
70 documentedBy,
71 "",
72 NULL);
73
74 gtk_widget_show(aboutBox);
75 }
76
notimpl(GtkObject *,gpointer)77 void notimpl(GtkObject */*object*/, gpointer /*data*/)
78 {
79 gnome_ok_dialog("Not implemented...");
80 }
81
prettyTitle(const gchar * path)82 gchar *prettyTitle(const gchar *path)
83 {
84 const gchar *name = g_basename(path);
85 gchar *title = g_strconcat("Gnome Layout Sample - ", name, NULL);
86
87 return title;
88 }
89
openOK(GtkObject *,gpointer data)90 void openOK(GtkObject */*object*/, gpointer data)
91 {
92 GtkFileSelection *fileselection = GTK_FILE_SELECTION(data);
93 GtkWidget *app = GTK_WIDGET(gtk_object_get_data(GTK_OBJECT(fileselection), "app"));
94 Context *context = (Context *) gtk_object_get_data(GTK_OBJECT(app), "context");
95 gchar *fileName = g_strdup(gtk_file_selection_get_filename(fileselection));
96 Paragraph *newPara;
97
98 gtk_widget_destroy(GTK_WIDGET(fileselection));
99
100 newPara = Paragraph::paragraphFactory(fileName, font, guiSupport);
101
102 if (newPara != NULL) {
103 gchar *title = prettyTitle(fileName);
104 GtkWidget *area = GTK_WIDGET(gtk_object_get_data(GTK_OBJECT(app), "area"));
105
106 if (context->paragraph != NULL) {
107 delete context->paragraph;
108 }
109
110 context->paragraph = newPara;
111 gtk_window_set_title(GTK_WINDOW(app), title);
112
113 gtk_widget_hide(area);
114 context->paragraph->breakLines(context->width, context->height);
115 gtk_widget_show_all(area);
116
117 g_free(title);
118 }
119
120 g_free(fileName);
121 }
122
openfile(GtkObject *,gpointer data)123 void openfile(GtkObject */*object*/, gpointer data)
124 {
125 GtkWidget *app = GTK_WIDGET(data);
126 GtkWidget *fileselection;
127 GtkWidget *okButton;
128 GtkWidget *cancelButton;
129
130 fileselection =
131 gtk_file_selection_new("Open File");
132
133 gtk_object_set_data(GTK_OBJECT(fileselection), "app", app);
134
135 okButton =
136 GTK_FILE_SELECTION(fileselection)->ok_button;
137
138 cancelButton =
139 GTK_FILE_SELECTION(fileselection)->cancel_button;
140
141 gtk_signal_connect(GTK_OBJECT(fileselection), "destroy",
142 GTK_SIGNAL_FUNC(gtk_main_quit), NULL);
143
144 gtk_signal_connect(GTK_OBJECT(okButton), "clicked",
145 GTK_SIGNAL_FUNC(openOK), fileselection);
146
147 gtk_signal_connect_object(GTK_OBJECT(cancelButton), "clicked",
148 GTK_SIGNAL_FUNC(gtk_widget_destroy), GTK_OBJECT(fileselection));
149
150 gtk_window_set_modal(GTK_WINDOW(fileselection), TRUE);
151 gtk_widget_show(fileselection);
152 gtk_main();
153 }
154
newapp(GtkObject *,gpointer)155 void newapp(GtkObject */*object*/, gpointer /*data*/)
156 {
157 GtkWidget *app = newSample("Sample.txt");
158
159 gtk_widget_show_all(app);
160 }
161
closeapp(GtkWidget *,gpointer data)162 void closeapp(GtkWidget */*widget*/, gpointer data)
163 {
164 GtkWidget *app = GTK_WIDGET(data);
165
166 closeSample(app);
167 }
168
shutdown(GtkObject *,gpointer)169 void shutdown(GtkObject */*object*/, gpointer /*data*/)
170 {
171 gtk_main_quit();
172 }
173
174 GnomeUIInfo fileMenu[] =
175 {
176 GNOMEUIINFO_MENU_NEW_ITEM((gchar *) "_New Sample",
177 (gchar *) "Create a new Gnome Layout Sample",
178 newapp, NULL),
179
180 GNOMEUIINFO_MENU_OPEN_ITEM(openfile, NULL),
181 GNOMEUIINFO_SEPARATOR,
182 GNOMEUIINFO_MENU_CLOSE_ITEM(closeapp, NULL),
183 GNOMEUIINFO_MENU_EXIT_ITEM(shutdown, NULL),
184 GNOMEUIINFO_END
185 };
186
187 GnomeUIInfo helpMenu[] =
188 {
189 // GNOMEUIINFO_HELP("gnomelayout"),
190 GNOMEUIINFO_MENU_ABOUT_ITEM(showabout, NULL),
191 GNOMEUIINFO_END
192 };
193
194 GnomeUIInfo mainMenu[] =
195 {
196 GNOMEUIINFO_SUBTREE(N_((gchar *) "File"), fileMenu),
197 GNOMEUIINFO_SUBTREE(N_((gchar *) "Help"), helpMenu),
198 GNOMEUIINFO_END
199 };
200
eventDelete(GtkWidget * widget,GdkEvent *,gpointer)201 gint eventDelete(GtkWidget *widget, GdkEvent */*event*/, gpointer /*data*/)
202 {
203 closeSample(widget);
204
205 // indicate that closeapp already destroyed the window
206 return TRUE;
207 }
208
eventConfigure(GtkWidget *,GdkEventConfigure * event,Context * context)209 gint eventConfigure(GtkWidget */*widget*/, GdkEventConfigure *event, Context *context)
210 {
211 if (context->paragraph != NULL) {
212 context->width = event->width;
213 context->height = event->height;
214
215 if (context->width > 0 && context->height > 0) {
216 context->paragraph->breakLines(context->width, context->height);
217 }
218 }
219
220 return TRUE;
221 }
222
eventExpose(GtkWidget * widget,GdkEvent *,Context * context)223 gint eventExpose(GtkWidget *widget, GdkEvent */*event*/, Context *context)
224 {
225 if (context->paragraph != NULL) {
226 gint maxLines = context->paragraph->getLineCount() - 1;
227 gint firstLine = 0, lastLine = context->height / context->paragraph->getLineHeight();
228 GnomeSurface surface(widget);
229
230 context->paragraph->draw(&surface, firstLine, (maxLines < lastLine)? maxLines : lastLine);
231 }
232
233 return TRUE;
234 }
235
newSample(const gchar * fileName)236 GtkWidget *newSample(const gchar *fileName)
237 {
238 Context *context = new Context();
239
240 context->width = 600;
241 context->height = 400;
242 context->paragraph = Paragraph::paragraphFactory(fileName, font, guiSupport);
243
244 gchar *title = prettyTitle(fileName);
245 GtkWidget *app = gnome_app_new("gnomeLayout", title);
246
247 gtk_object_set_data(GTK_OBJECT(app), "context", context);
248
249 gtk_window_set_default_size(GTK_WINDOW(app), 600 - 24, 400);
250
251 gnome_app_create_menus_with_data(GNOME_APP(app), mainMenu, app);
252
253 gtk_signal_connect(GTK_OBJECT(app), "delete_event",
254 GTK_SIGNAL_FUNC(eventDelete), NULL);
255
256 GtkWidget *area = gtk_drawing_area_new();
257 gtk_object_set_data(GTK_OBJECT(app), "area", area);
258
259 GtkStyle *style = gtk_style_copy(gtk_widget_get_style(area));
260
261 for (int i = 0; i < 5; i += 1) {
262 style->fg[i] = style->white;
263 }
264
265 gtk_widget_set_style(area, style);
266
267 gnome_app_set_contents(GNOME_APP(app), area);
268
269 gtk_signal_connect(GTK_OBJECT(area),
270 "expose_event",
271 GTK_SIGNAL_FUNC(eventExpose),
272 context);
273
274 gtk_signal_connect(GTK_OBJECT(area),
275 "configure_event",
276 GTK_SIGNAL_FUNC(eventConfigure),
277 context);
278
279 appList = g_slist_prepend(appList, app);
280
281 g_free(title);
282
283 return app;
284 }
285
closeSample(GtkWidget * app)286 void closeSample(GtkWidget *app)
287 {
288 Context *context = (Context *) gtk_object_get_data(GTK_OBJECT(app), "context");
289
290 if (context->paragraph != NULL) {
291 delete context->paragraph;
292 }
293
294 delete context;
295
296 appList = g_slist_remove(appList, app);
297
298 gtk_widget_destroy(app);
299
300 if (appList == NULL) {
301 gtk_main_quit();
302 }
303 }
304
main(int argc,char * argv[])305 int main (int argc, char *argv[])
306 {
307 LEErrorCode fontStatus = LE_NO_ERROR;
308 poptContext ptctx;
309 GtkWidget *app;
310
311 FT_Init_FreeType(&engine);
312
313 gnome_init_with_popt_table("gnomelayout", "0.1", argc, argv, NULL, 0, &ptctx);
314
315 guiSupport = new GnomeGUISupport();
316 fontMap = new GnomeFontMap(engine, "FontMap.Gnome", 24, guiSupport, fontStatus);
317 font = new ScriptCompositeFontInstance(fontMap);
318
319 if (LE_FAILURE(fontStatus)) {
320 FT_Done_FreeType(engine);
321 return 1;
322 }
323
324 const char *defaultArgs[] = {"Sample.txt", NULL};
325 const char **args = poptGetArgs(ptctx);
326
327 if (args == NULL) {
328 args = defaultArgs;
329 }
330
331 for (int i = 0; args[i] != NULL; i += 1) {
332 app = newSample(args[i]);
333
334 gtk_widget_show_all(app);
335 }
336
337 poptFreeContext(ptctx);
338
339 gtk_main();
340
341 delete font;
342 delete guiSupport;
343
344 FT_Done_FreeType(engine);
345
346 exit(0);
347 }
348