This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
testime.c
1
2
3
4
5
6
7
8
9
10
11
/*
Copyright (C) 1997-2011 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely.
*/
12
/* A simple program to test the Input Method support in the SDL library (2.0+) */
13
14
15
16
17
18
19
20
21
22
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "SDL.h"
#ifdef HAVE_SDL_TTF
#include "SDL_ttf.h"
#endif
23
24
#include "common.h"
25
26
27
28
#define DEFAULT_PTSIZE 30
#define DEFAULT_FONT "/System/Library/Fonts/华文细黑.ttf"
#define MAX_TEXT_LENGTH 256
29
30
31
32
33
34
35
static CommonState *state;
static SDL_Rect textRect, markedRect;
static SDL_Color lineColor = {0,0,0,0};
static SDL_Color backColor = {255,255,255,0};
static SDL_Color textColor = {0,0,0,0};
static char text[MAX_TEXT_LENGTH], markedText[SDL_TEXTEDITINGEVENT_TEXT_SIZE];
static int cursor = 0;
36
#ifdef HAVE_SDL_TTF
37
static TTF_Font *font;
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
#endif
size_t utf8_length(unsigned char c)
{
c = (unsigned char)(0xff & c);
if (c < 0x80)
return 1;
else if ((c >> 5) ==0x6)
return 2;
else if ((c >> 4) == 0xe)
return 3;
else if ((c >> 3) == 0x1e)
return 4;
else
return 0;
}
char *utf8_next(char *p)
{
size_t len = utf8_length(*p);
size_t i = 0;
if (!len)
return 0;
for (; i < len; ++i)
{
++p;
if (!*p)
return 0;
}
return p;
}
char *utf8_advance(char *p, size_t distance)
{
size_t i = 0;
for (; i < distance && p; ++i)
{
p = utf8_next(p);
}
return p;
}
void usage()
{
83
printf("usage: testime [--font fontfile]\n");
84
85
86
87
88
89
90
91
exit(0);
}
void InitInput()
{
/* Prepare a rect for text input */
textRect.x = textRect.y = 100;
92
textRect.w = DEFAULT_WINDOW_WIDTH - 2 * textRect.x;
93
94
95
96
97
98
99
100
101
textRect.h = 50;
text[0] = 0;
markedRect = textRect;
markedText[0] = 0;
SDL_StartTextInput();
}
102
void CleanupVideo()
104
105
106
107
SDL_StopTextInput();
#ifdef HAVE_SDL_TTF
TTF_CloseFont(font);
TTF_Quit();
108
#endif
111
112
void _Redraw(SDL_Renderer * renderer) {
113
114
115
int w = 0, h = textRect.h;
SDL_Rect cursorRect, underlineRect;
116
117
SDL_SetRenderDrawColor(renderer, 255,255,255,255);
SDL_RenderFillRect(renderer,&textRect);
118
119
120
121
#ifdef HAVE_SDL_TTF
if (*text)
{
122
123
124
125
126
127
128
129
SDL_Surface *textSur = TTF_RenderUTF8_Blended(font, text, textColor);
SDL_Rect dest = {textRect.x, textRect.y, textSur->w, textSur->h };
SDL_Texture *texture = SDL_CreateTextureFromSurface(renderer,textSur);
SDL_FreeSurface(textSur);
SDL_RenderCopy(renderer,texture,NULL,&dest);
SDL_DestroyTexture(texture);
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
TTF_SizeUTF8(font, text, &w, &h);
}
#endif
markedRect.x = textRect.x + w;
markedRect.w = textRect.w - w;
if (markedRect.w < 0)
{
// Stop text input because we cannot hold any more characters
SDL_StopTextInput();
return;
}
else
{
SDL_StartTextInput();
}
cursorRect = markedRect;
cursorRect.w = 2;
cursorRect.h = h;
151
152
153
SDL_SetRenderDrawColor(renderer, 255,255,255,255);
SDL_RenderFillRect(renderer,&markedRect);
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
if (markedText[0])
{
#ifdef HAVE_SDL_TTF
if (cursor)
{
char *p = utf8_advance(markedText, cursor);
char c = 0;
if (!p)
p = &markedText[strlen(markedText)];
c = *p;
*p = 0;
TTF_SizeUTF8(font, markedText, &w, 0);
cursorRect.x += w;
*p = c;
}
170
171
SDL_Surface *textSur = TTF_RenderUTF8_Blended(font, markedText, textColor);
SDL_Rect dest = {markedRect.x, markedRect.y, textSur->w, textSur->h };
172
TTF_SizeUTF8(font, markedText, &w, &h);
173
174
175
176
177
SDL_Texture *texture = SDL_CreateTextureFromSurface(renderer,textSur);
SDL_FreeSurface(textSur);
SDL_RenderCopy(renderer,texture,NULL,&dest);
SDL_DestroyTexture(texture);
178
179
180
181
182
183
184
#endif
underlineRect = markedRect;
underlineRect.y += (h - 2);
underlineRect.h = 2;
underlineRect.w = w;
185
186
SDL_SetRenderDrawColor(renderer, 0,0,0,0);
SDL_RenderFillRect(renderer,&markedRect);
187
188
}
189
190
SDL_SetRenderDrawColor(renderer, 0,0,0,0);
SDL_RenderFillRect(renderer,&cursorRect);
191
192
193
194
SDL_SetTextInputRect(&markedRect);
}
195
196
197
198
199
200
201
202
203
204
void Redraw() {
int i;
for (i = 0; i < state->num_windows; ++i) {
SDL_Renderer *renderer = state->renderers[i];
SDL_SetRenderDrawColor(renderer, 0, 0, 0, 0);
SDL_RenderClear(renderer);
_Redraw(renderer);
SDL_RenderPresent(renderer);
205
206
207
}
}
208
209
int main(int argc, char *argv[]) {
int i, done;
210
SDL_Event event;
211
const char *fontname = DEFAULT_FONT;
213
214
215
216
217
218
219
220
221
/* Initialize test framework */
state = CommonCreateState(argv, SDL_INIT_VIDEO);
if (!state) {
return 1;
}
for (i = 1; i < argc;i++) {
CommonArg(state, i);
}
for (argc--, argv++; argc > 0; argc--, argv++)
223
224
225
226
if (strcmp(argv[0], "--help") == 0) {
usage();
return 0;
}
228
229
230
231
else if (strcmp(argv[0], "--font") == 0)
{
argc--;
argv++;
233
234
235
236
237
if (argc > 0)
fontname = argv[0];
else {
usage();
return 0;
239
240
241
242
243
244
}
}
if (!CommonInit(state)) {
return 2;
}
247
248
249
#ifdef HAVE_SDL_TTF
/* Initialize fonts */
TTF_Init();
251
252
253
254
255
256
257
font = TTF_OpenFont(fontname, DEFAULT_PTSIZE);
if (! font)
{
fprintf(stderr, "Failed to find font: %s\n", TTF_GetError());
exit(-1);
}
#endif
259
260
printf("Using font: %s\n", fontname);
atexit(SDL_Quit);
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
InitInput();
/* Create the windows and initialize the renderers */
for (i = 0; i < state->num_windows; ++i) {
SDL_Renderer *renderer = state->renderers[i];
SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_NONE);
SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
SDL_RenderClear(renderer);
}
Redraw();
/* Main render loop */
done = 0;
while (!done) {
/* Check for events */
while (SDL_PollEvent(&event)) {
CommonEvent(state, &event, &done);
switch(event.type) {
case SDL_KEYDOWN: {
switch (event.key.keysym.sym)
{
case SDLK_RETURN:
text[0]=0x00;
Redraw();
break;
case SDLK_BACKSPACE:
{
int textlen=SDL_strlen(text);
do {
if (textlen==0)
{
break;
}
if ((text[textlen-1] & 0x80) == 0x00)
{
/* One byte */
text[textlen-1]=0x00;
break;
}
if ((text[textlen-1] & 0xC0) == 0x80)
{
/* Byte from the multibyte sequence */
text[textlen-1]=0x00;
textlen--;
}
if ((text[textlen-1] & 0xC0) == 0xC0)
{
/* First byte of multibyte sequence */
text[textlen-1]=0x00;
break;
}
} while(1);
Redraw();
}
break;
}
if (done)
{
break;
}
fprintf(stderr,
"Keyboard: scancode 0x%08X = %s, keycode 0x%08X = %s\n",
event.key.keysym.scancode,
SDL_GetScancodeName(event.key.keysym.scancode),
event.key.keysym.sym, SDL_GetKeyName(event.key.keysym.sym));
break;
case SDL_TEXTINPUT:
if (SDL_strlen(event.text.text) == 0 || event.text.text[0] == '\n' ||
markedRect.w < 0)
break;
fprintf(stderr, "Keyboard: text input \"%s\"\n", event.text.text);
if (SDL_strlen(text) + SDL_strlen(event.text.text) < sizeof(text))
SDL_strlcat(text, event.text.text, sizeof(text));
fprintf(stderr, "text inputed: %s\n", text);
// After text inputed, we can clear up markedText because it
// is committed
markedText[0] = 0;
Redraw();
break;
case SDL_TEXTEDITING:
fprintf(stderr, "text editing \"%s\", selected range (%d, %d)\n",
event.edit.text, event.edit.start, event.edit.length);
strcpy(markedText, event.edit.text);
cursor = event.edit.start;
Redraw();
break;
}
break;
}
361
362
363
}
}
CleanupVideo();
364
CommonQuit(state);
365
366
return 0;
}
368
369
/* vi: set ts=4 sw=4 expandtab: */