SDL  2.0
testime.c
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1 /*
2  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
3 
4  This software is provided 'as-is', without any express or implied
5  warranty. In no event will the authors be held liable for any damages
6  arising from the use of this software.
7 
8  Permission is granted to anyone to use this software for any purpose,
9  including commercial applications, and to alter it and redistribute it
10  freely.
11 */
12 /* A simple program to test the Input Method support in the SDL library (2.0+) */
13 
14 #include <stdlib.h>
15 #include <stdio.h>
16 #include <string.h>
17 
18 #include "SDL.h"
19 #ifdef HAVE_SDL_TTF
20 #include "SDL_ttf.h"
21 #endif
22 
23 #include "SDL_test_common.h"
24 
25 #define DEFAULT_PTSIZE 30
26 #define DEFAULT_FONT "/System/Library/Fonts/华文细黑.ttf"
27 #define MAX_TEXT_LENGTH 256
28 
31 static SDL_Color lineColor = {0,0,0,0};
32 static SDL_Color backColor = {255,255,255,0};
33 static SDL_Color textColor = {0,0,0,0};
35 static int cursor = 0;
36 #ifdef HAVE_SDL_TTF
37 static TTF_Font *font;
38 #endif
39 
40 size_t utf8_length(unsigned char c)
41 {
42  c = (unsigned char)(0xff & c);
43  if (c < 0x80)
44  return 1;
45  else if ((c >> 5) ==0x6)
46  return 2;
47  else if ((c >> 4) == 0xe)
48  return 3;
49  else if ((c >> 3) == 0x1e)
50  return 4;
51  else
52  return 0;
53 }
54 
55 char *utf8_next(char *p)
56 {
57  size_t len = utf8_length(*p);
58  size_t i = 0;
59  if (!len)
60  return 0;
61 
62  for (; i < len; ++i)
63  {
64  ++p;
65  if (!*p)
66  return 0;
67  }
68  return p;
69 }
70 
71 char *utf8_advance(char *p, size_t distance)
72 {
73  size_t i = 0;
74  for (; i < distance && p; ++i)
75  {
76  p = utf8_next(p);
77  }
78  return p;
79 }
80 
81 void usage()
82 {
83  SDL_Log("usage: testime [--font fontfile]\n");
84  exit(0);
85 }
86 
87 void InitInput()
88 {
89 
90  /* Prepare a rect for text input */
91  textRect.x = textRect.y = 100;
92  textRect.w = DEFAULT_WINDOW_WIDTH - 2 * textRect.x;
93  textRect.h = 50;
94 
95  text[0] = 0;
96  markedRect = textRect;
97  markedText[0] = 0;
98 
100 }
101 
103 {
105 #ifdef HAVE_SDL_TTF
106  TTF_CloseFont(font);
107  TTF_Quit();
108 #endif
109 }
110 
111 
113  int w = 0, h = textRect.h;
114  SDL_Rect cursorRect, underlineRect;
115 
116  SDL_SetRenderDrawColor(renderer, 255,255,255,255);
117  SDL_RenderFillRect(renderer,&textRect);
118 
119 #ifdef HAVE_SDL_TTF
120  if (*text)
121  {
122  SDL_Surface *textSur = TTF_RenderUTF8_Blended(font, text, textColor);
123  SDL_Rect dest = {textRect.x, textRect.y, textSur->w, textSur->h };
124 
125  SDL_Texture *texture = SDL_CreateTextureFromSurface(renderer,textSur);
126  SDL_FreeSurface(textSur);
127 
128  SDL_RenderCopy(renderer,texture,NULL,&dest);
129  SDL_DestroyTexture(texture);
130  TTF_SizeUTF8(font, text, &w, &h);
131  }
132 #endif
133 
134  markedRect.x = textRect.x + w;
135  markedRect.w = textRect.w - w;
136  if (markedRect.w < 0)
137  {
138  /* Stop text input because we cannot hold any more characters */
140  return;
141  }
142  else
143  {
145  }
146 
147  cursorRect = markedRect;
148  cursorRect.w = 2;
149  cursorRect.h = h;
150 
151  SDL_SetRenderDrawColor(renderer, 255,255,255,255);
152  SDL_RenderFillRect(renderer,&markedRect);
153 
154  if (markedText[0])
155  {
156 #ifdef HAVE_SDL_TTF
157  if (cursor)
158  {
159  char *p = utf8_advance(markedText, cursor);
160  char c = 0;
161  if (!p)
162  p = &markedText[strlen(markedText)];
163 
164  c = *p;
165  *p = 0;
166  TTF_SizeUTF8(font, markedText, &w, 0);
167  cursorRect.x += w;
168  *p = c;
169  }
170  SDL_Surface *textSur = TTF_RenderUTF8_Blended(font, markedText, textColor);
171  SDL_Rect dest = {markedRect.x, markedRect.y, textSur->w, textSur->h };
172  TTF_SizeUTF8(font, markedText, &w, &h);
173  SDL_Texture *texture = SDL_CreateTextureFromSurface(renderer,textSur);
174  SDL_FreeSurface(textSur);
175 
176  SDL_RenderCopy(renderer,texture,NULL,&dest);
177  SDL_DestroyTexture(texture);
178 #endif
179 
180  underlineRect = markedRect;
181  underlineRect.y += (h - 2);
182  underlineRect.h = 2;
183  underlineRect.w = w;
184 
185  SDL_SetRenderDrawColor(renderer, 0,0,0,0);
186  SDL_RenderFillRect(renderer,&markedRect);
187  }
188 
189  SDL_SetRenderDrawColor(renderer, 0,0,0,0);
190  SDL_RenderFillRect(renderer,&cursorRect);
191 
192  SDL_SetTextInputRect(&markedRect);
193 }
194 
195 void Redraw() {
196  int i;
197  for (i = 0; i < state->num_windows; ++i) {
198  SDL_Renderer *renderer = state->renderers[i];
199  if (state->windows[i] == NULL)
200  continue;
201  SDL_SetRenderDrawColor(renderer, 0, 0, 0, 0);
202  SDL_RenderClear(renderer);
203 
204  _Redraw(renderer);
205 
206  SDL_RenderPresent(renderer);
207  }
208 }
209 
210 int main(int argc, char *argv[]) {
211  int i, done;
213  const char *fontname = DEFAULT_FONT;
214 
215  /* Enable standard application logging */
217 
218  /* Initialize test framework */
220  if (!state) {
221  return 1;
222  }
223  for (i = 1; i < argc;i++) {
224  SDLTest_CommonArg(state, i);
225  }
226  for (argc--, argv++; argc > 0; argc--, argv++)
227  {
228  if (strcmp(argv[0], "--help") == 0) {
229  usage();
230  return 0;
231  }
232 
233  else if (strcmp(argv[0], "--font") == 0)
234  {
235  argc--;
236  argv++;
237 
238  if (argc > 0)
239  fontname = argv[0];
240  else {
241  usage();
242  return 0;
243  }
244  }
245  }
246 
247  if (!SDLTest_CommonInit(state)) {
248  return 2;
249  }
250 
251 
252 #ifdef HAVE_SDL_TTF
253  /* Initialize fonts */
254  TTF_Init();
255 
256  font = TTF_OpenFont(fontname, DEFAULT_PTSIZE);
257  if (! font)
258  {
259  SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Failed to find font: %s\n", TTF_GetError());
260  exit(-1);
261  }
262 #endif
263 
264  SDL_Log("Using font: %s\n", fontname);
265  atexit(SDL_Quit);
266 
267  InitInput();
268  /* Create the windows and initialize the renderers */
269  for (i = 0; i < state->num_windows; ++i) {
270  SDL_Renderer *renderer = state->renderers[i];
272  SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
273  SDL_RenderClear(renderer);
274  }
275  Redraw();
276  /* Main render loop */
277  done = 0;
278  while (!done) {
279  /* Check for events */
280  while (SDL_PollEvent(&event)) {
281  SDLTest_CommonEvent(state, &event, &done);
282  switch(event.type) {
283  case SDL_KEYDOWN: {
284  switch (event.key.keysym.sym)
285  {
286  case SDLK_RETURN:
287  text[0]=0x00;
288  Redraw();
289  break;
290  case SDLK_BACKSPACE:
291  {
292  size_t textlen = SDL_strlen(text);
293 
294  do {
295  if (textlen==0)
296  {
297  break;
298  }
299  if ((text[textlen-1] & 0x80) == 0x00)
300  {
301  /* One byte */
302  text[textlen-1]=0x00;
303  break;
304  }
305  if ((text[textlen-1] & 0xC0) == 0x80)
306  {
307  /* Byte from the multibyte sequence */
308  text[textlen-1]=0x00;
309  textlen--;
310  }
311  if ((text[textlen-1] & 0xC0) == 0xC0)
312  {
313  /* First byte of multibyte sequence */
314  text[textlen-1]=0x00;
315  break;
316  }
317  } while(1);
318 
319  Redraw();
320  }
321  break;
322  }
323 
324  if (done)
325  {
326  break;
327  }
328 
329  SDL_Log("Keyboard: scancode 0x%08X = %s, keycode 0x%08X = %s\n",
330  event.key.keysym.scancode,
332  event.key.keysym.sym, SDL_GetKeyName(event.key.keysym.sym));
333  break;
334 
335  case SDL_TEXTINPUT:
336  if (event.text.text[0] == '\0' || event.text.text[0] == '\n' ||
337  markedRect.w < 0)
338  break;
339 
340  SDL_Log("Keyboard: text input \"%s\"\n", event.text.text);
341 
342  if (SDL_strlen(text) + SDL_strlen(event.text.text) < sizeof(text))
343  SDL_strlcat(text, event.text.text, sizeof(text));
344 
345  SDL_Log("text inputed: %s\n", text);
346 
347  /* After text inputed, we can clear up markedText because it */
348  /* is committed */
349  markedText[0] = 0;
350  Redraw();
351  break;
352 
353  case SDL_TEXTEDITING:
354  SDL_Log("text editing \"%s\", selected range (%d, %d)\n",
355  event.edit.text, event.edit.start, event.edit.length);
356 
357  strcpy(markedText, event.edit.text);
358  cursor = event.edit.start;
359  Redraw();
360  break;
361  }
362  break;
363 
364  }
365  }
366  }
367  CleanupVideo();
368  SDLTest_CommonQuit(state);
369  return 0;
370 }
371 
372 
373 /* vi: set ts=4 sw=4 expandtab: */
void CleanupVideo()
Definition: testime.c:102
#define SDL_PollEvent
static SDL_Color backColor
Definition: testime.c:32
#define SDL_strlcat
SDLTest_CommonState * SDLTest_CommonCreateState(char **argv, Uint32 flags)
Parse command line parameters and create common state.
#define SDL_RenderFillRect
GLenum GLenum GLuint texture
GLfloat GLfloat p
char * utf8_next(char *p)
Definition: testime.c:55
int SDLTest_CommonArg(SDLTest_CommonState *state, int index)
Process one common argument.
A collection of pixels used in software blitting.
Definition: SDL_surface.h:69
#define SDL_SetRenderDrawBlendMode
SDL_Scancode scancode
Definition: SDL_keyboard.h:49
SDL_bool SDLTest_CommonInit(SDLTest_CommonState *state)
Open test window.
#define MAX_TEXT_LENGTH
Definition: testime.c:27
GLenum GLsizei len
static SDL_Color lineColor
Definition: testime.c:31
GLsizei GLsizei GLfloat distance
SDL_Window ** windows
static int cursor
Definition: testime.c:35
#define SDL_LogError
#define SDL_RenderCopy
SDL_Renderer * renderer
#define SDL_Log
char * utf8_advance(char *p, size_t distance)
Definition: testime.c:71
SDL_TextInputEvent text
Definition: SDL_events.h:528
#define SDL_StopTextInput
char text[SDL_TEXTINPUTEVENT_TEXT_SIZE]
Definition: SDL_events.h:223
#define SDL_CreateTextureFromSurface
void SDLTest_CommonEvent(SDLTest_CommonState *state, SDL_Event *event, int *done)
Common event handler for test windows.
void InitInput()
Definition: testime.c:87
#define SDL_FreeSurface
struct _cl_event * event
#define SDL_Quit
int done
Definition: checkkeys.c:28
const GLubyte * c
char text[SDL_TEXTEDITINGEVENT_TEXT_SIZE]
Definition: SDL_events.h:208
int main(int argc, char *argv[])
Definition: testime.c:210
void Redraw()
Definition: testime.c:195
static SDLTest_CommonState * state
Definition: testime.c:29
int x
Definition: SDL_rect.h:66
SDL_Keysym keysym
Definition: SDL_events.h:196
int w
Definition: SDL_rect.h:67
#define SDL_StartTextInput
SDL_Renderer ** renderers
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int in i)
Definition: SDL_x11sym.h:42
#define SDL_LogSetPriority
#define NULL
Definition: begin_code.h:143
SDL_TextEditingEvent edit
Definition: SDL_events.h:527
static char text[MAX_TEXT_LENGTH]
Definition: testime.c:34
#define SDL_RenderClear
#define SDL_GetScancodeName
#define SDL_SetTextInputRect
static char markedText[SDL_TEXTEDITINGEVENT_TEXT_SIZE]
Definition: testime.c:34
SDL_KeyboardEvent key
Definition: SDL_events.h:526
#define SDL_DestroyTexture
#define SDL_strlen
int h
Definition: SDL_rect.h:67
static SDL_Rect textRect
Definition: testime.c:30
#define SDL_GetKeyName
SDL_Keycode sym
Definition: SDL_keyboard.h:50
#define DEFAULT_FONT
Definition: testime.c:26
size_t utf8_length(unsigned char c)
Definition: testime.c:40
General event structure.
Definition: SDL_events.h:521
#define SDL_SetRenderDrawColor
GLubyte GLubyte GLubyte GLubyte w
void usage()
Definition: testime.c:81
void _Redraw(SDL_Renderer *renderer)
Definition: testime.c:112
#define DEFAULT_PTSIZE
Definition: testime.c:25
#define DEFAULT_WINDOW_WIDTH
int y
Definition: SDL_rect.h:66
static SDL_Rect markedRect
Definition: testime.c:30
void SDLTest_CommonQuit(SDLTest_CommonState *state)
Close test window.
GLfloat GLfloat GLfloat GLfloat h
static SDL_Color textColor
Definition: testime.c:33
#define SDL_INIT_VIDEO
Definition: SDL.h:77
A rectangle, with the origin at the upper left.
Definition: SDL_rect.h:64
#define SDL_RenderPresent
Uint32 type
Definition: SDL_events.h:523
#define SDL_TEXTEDITINGEVENT_TEXT_SIZE
Definition: SDL_events.h:199