This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
testime.c
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/* A simple program to test the Input Method support in the SDL library (1.3+) */
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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "SDL.h"
#ifdef HAVE_SDL_TTF
#include "SDL_ttf.h"
#endif
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#define DEFAULT_PTSIZE 30
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#define DEFAULT_FONT "/System/Library/Fonts/华文细黑.ttf"
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#define MAX_TEXT_LENGTH 256
SDL_Surface *screen;
#ifdef HAVE_SDL_TTF
TTF_Font *font;
#endif
SDL_Rect textRect, markedRect;
Uint32 lineColor, backColor;
SDL_Color textColor = { 0, 0, 0 };
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char text[MAX_TEXT_LENGTH], markedText[SDL_TEXTEDITINGEVENT_TEXT_SIZE];
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int cursor = 0;
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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;
}
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char *utf8_advance(char *p, size_t distance)
{
size_t i = 0;
for (; i < distance && p; ++i)
{
p = utf8_next(p);
}
return p;
}
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void usage()
{
printf("usage: testime [--font fontfile] [--fullscreen]\n");
exit(0);
}
void InitVideo(int argc, char *argv[])
{
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int width = 640, height = 480;
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int flags = SDL_HWSURFACE;
const char *fontname = DEFAULT_FONT;
int fullscreen = 0;
for (argc--, argv++; argc > 0; argc--, argv++)
{
if (strcmp(argv[0], "--help") == 0)
usage();
else if (strcmp(argv[0], "--fullscreen") == 0)
fullscreen = 1;
else if (strcmp(argv[0], "--font") == 0)
{
argc--;
argv++;
if (argc > 0)
fontname = argv[0];
else
usage();
}
}
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SDL_setenv("SDL_VIDEO_WINDOW_POS", "center", 1);
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if (SDL_Init(SDL_INIT_VIDEO) < 0)
{
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fprintf(stderr, "Unable to init SDL: %s\n", SDL_GetError());
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exit(-1);
}
#ifdef HAVE_SDL_TTF
/* Initialize fonts */
TTF_Init();
font = TTF_OpenFont(fontname, DEFAULT_PTSIZE);
if (! font)
{
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fprintf(stderr, "Failed to find font: %s\n", TTF_GetError());
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exit(-1);
}
#endif
printf("Using font: %s\n", fontname);
atexit(SDL_Quit);
if (fullscreen)
{
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/* Use the desktop mode */
width = 0;
height = 0;
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flags |= SDL_FULLSCREEN;
}
/* Create window */
screen = SDL_SetVideoMode(width, height, 32, flags);
if (screen == NULL)
{
fprintf(stderr, "Unable to set %dx%d video: %s\n",
width, height, SDL_GetError());
exit(-1);
}
}
void CleanupVideo()
{
SDL_StopTextInput();
#ifdef HAVE_SDL_TTF
TTF_CloseFont(font);
TTF_Quit();
#endif
}
void InitInput()
{
backColor = SDL_MapRGB(screen->format, 0xFF, 0xFF, 0xFF);
lineColor = SDL_MapRGB(screen->format, 0x0, 0x0, 0x0);
/* Prepare a rect for text input */
textRect.x = textRect.y = 100;
textRect.w = screen->w - 2 * textRect.x;
textRect.h = 50;
text[0] = 0;
markedRect = textRect;
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markedText[0] = 0;
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SDL_StartTextInput();
}
#ifdef HAVE_SDL_TTF
static void RenderText(SDL_Surface *sur,
TTF_Font *font,
const char *text,
int x, int y,
SDL_Color color)
{
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if (text && *text) {
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SDL_Surface *textSur = TTF_RenderUTF8_Blended(font, text, color);
SDL_Rect dest = { x, y, textSur->w, textSur->h };
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SDL_BlitSurface(textSur, NULL, sur, &dest);
SDL_FreeSurface(textSur);
}
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}
#endif
void Redraw()
{
int w = 0, h = textRect.h;
SDL_Rect cursorRect, underlineRect;
SDL_FillRect(screen, &textRect, backColor);
#ifdef HAVE_SDL_TTF
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if (*text)
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{
RenderText(screen, font, text, textRect.x, textRect.y, textColor);
TTF_SizeUTF8(font, text, &w, &h);
}
#endif
markedRect.x = textRect.x + w;
markedRect.w = textRect.w - w;
if (markedRect.w < 0)
{
SDL_Flip(screen);
// Stop text input because we cannot hold any more characters
SDL_StopTextInput();
return;
}
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else
{
SDL_StartTextInput();
}
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cursorRect = markedRect;
cursorRect.w = 2;
cursorRect.h = h;
SDL_FillRect(screen, &markedRect, backColor);
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if (markedText[0])
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{
#ifdef HAVE_SDL_TTF
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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;
}
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RenderText(screen, font, markedText, markedRect.x, markedRect.y, textColor);
TTF_SizeUTF8(font, markedText, &w, &h);
#endif
underlineRect = markedRect;
underlineRect.y += (h - 2);
underlineRect.h = 2;
underlineRect.w = w;
SDL_FillRect(screen, &underlineRect, lineColor);
}
SDL_FillRect(screen, &cursorRect, lineColor);
SDL_Flip(screen);
SDL_SetTextInputRect(&markedRect);
}
void
HotKey_ToggleFullScreen(void)
{
SDL_Surface *screen;
screen = SDL_GetVideoSurface();
if (SDL_WM_ToggleFullScreen(screen)) {
printf("Toggled fullscreen mode - now %s\n",
(screen->flags & SDL_FULLSCREEN) ? "fullscreen" : "windowed");
} else {
printf("Unable to toggle fullscreen mode\n");
}
}
int main(int argc, char *argv[])
{
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SDL_Event event;
int done = 0;
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InitVideo(argc, argv);
InitInput();
Redraw();
while (! done && SDL_WaitEvent(&event))
{
switch (event.type)
{
case SDL_KEYDOWN:
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switch (event.key.keysym.sym)
{
case SDLK_ESCAPE:
done = 1;
break;
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)
{
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break;
}
fprintf(stderr,
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"Keyboard: scancode 0x%08X = %s, keycode 0x%08X = %s\n",
event.key.keysym.scancode,
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SDL_GetScancodeName(event.key.keysym.scancode),
event.key.keysym.sym, SDL_GetKeyName(event.key.keysym.sym));
break;
case SDL_TEXTINPUT:
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if (SDL_strlen(event.text.text) == 0 || event.text.text[0] == '\n' ||
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markedRect.w < 0)
break;
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fprintf(stderr, "Keyboard: text input \"%s\"\n", event.text.text);
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if (SDL_strlen(text) + SDL_strlen(event.text.text) < sizeof(text))
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SDL_strlcat(text, event.text.text, sizeof(text));
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fprintf(stderr, "text inputed: %s\n", text);
// After text inputed, we can clear up markedText because it
// is committed
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markedText[0] = 0;
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Redraw();
break;
case SDL_TEXTEDITING:
fprintf(stderr, "text editing \"%s\", selected range (%d, %d)\n",
event.edit.text, event.edit.start, event.edit.length);
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strcpy(markedText, event.edit.text);
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cursor = event.edit.start;
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Redraw();
break;
case SDL_QUIT:
done = 1;
break;
default:
break;
}
}
CleanupVideo();
return 0;
}
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/* vi: set ts=4 sw=4 expandtab: */