| /* |
| Copyright (C) 1997-2014 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. |
| */ |
| /* A simple program to test the Input Method support in the SDL library (2.0+) */ |
| |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <string.h> |
| |
| #include "SDL.h" |
| #ifdef HAVE_SDL_TTF |
| #include "SDL_ttf.h" |
| #endif |
| |
| #include "SDL_test_common.h" |
| |
| #define DEFAULT_PTSIZE 30 |
| #define DEFAULT_FONT "/System/Library/Fonts/华文细黑.ttf" |
| #define MAX_TEXT_LENGTH 256 |
| |
| static SDLTest_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; |
| #ifdef HAVE_SDL_TTF |
| static TTF_Font *font; |
| #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() |
| { |
| SDL_Log("usage: testime [--font fontfile]\n"); |
| exit(0); |
| } |
| |
| void InitInput() |
| { |
| |
| /* Prepare a rect for text input */ |
| textRect.x = textRect.y = 100; |
| textRect.w = DEFAULT_WINDOW_WIDTH - 2 * textRect.x; |
| textRect.h = 50; |
| |
| text[0] = 0; |
| markedRect = textRect; |
| markedText[0] = 0; |
| |
| SDL_StartTextInput(); |
| } |
| |
| void CleanupVideo() |
| { |
| SDL_StopTextInput(); |
| #ifdef HAVE_SDL_TTF |
| TTF_CloseFont(font); |
| TTF_Quit(); |
| #endif |
| } |
| |
| |
| void _Redraw(SDL_Renderer * renderer) { |
| int w = 0, h = textRect.h; |
| SDL_Rect cursorRect, underlineRect; |
| |
| SDL_SetRenderDrawColor(renderer, 255,255,255,255); |
| SDL_RenderFillRect(renderer,&textRect); |
| |
| #ifdef HAVE_SDL_TTF |
| if (*text) |
| { |
| 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); |
| 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; |
| |
| SDL_SetRenderDrawColor(renderer, 255,255,255,255); |
| SDL_RenderFillRect(renderer,&markedRect); |
| |
| 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; |
| } |
| SDL_Surface *textSur = TTF_RenderUTF8_Blended(font, markedText, textColor); |
| SDL_Rect dest = {markedRect.x, markedRect.y, textSur->w, textSur->h }; |
| TTF_SizeUTF8(font, markedText, &w, &h); |
| SDL_Texture *texture = SDL_CreateTextureFromSurface(renderer,textSur); |
| SDL_FreeSurface(textSur); |
| |
| SDL_RenderCopy(renderer,texture,NULL,&dest); |
| SDL_DestroyTexture(texture); |
| #endif |
| |
| underlineRect = markedRect; |
| underlineRect.y += (h - 2); |
| underlineRect.h = 2; |
| underlineRect.w = w; |
| |
| SDL_SetRenderDrawColor(renderer, 0,0,0,0); |
| SDL_RenderFillRect(renderer,&markedRect); |
| } |
| |
| SDL_SetRenderDrawColor(renderer, 0,0,0,0); |
| SDL_RenderFillRect(renderer,&cursorRect); |
| |
| SDL_SetTextInputRect(&markedRect); |
| } |
| |
| void Redraw() { |
| int i; |
| for (i = 0; i < state->num_windows; ++i) { |
| SDL_Renderer *renderer = state->renderers[i]; |
| if (state->windows[i] == NULL) |
| continue; |
| SDL_SetRenderDrawColor(renderer, 0, 0, 0, 0); |
| SDL_RenderClear(renderer); |
| |
| _Redraw(renderer); |
| |
| SDL_RenderPresent(renderer); |
| } |
| } |
| |
| int main(int argc, char *argv[]) { |
| int i, done; |
| SDL_Event event; |
| const char *fontname = DEFAULT_FONT; |
| |
| /* Enable standard application logging */ |
| SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO); |
| |
| /* Initialize test framework */ |
| state = SDLTest_CommonCreateState(argv, SDL_INIT_VIDEO); |
| if (!state) { |
| return 1; |
| } |
| for (i = 1; i < argc;i++) { |
| SDLTest_CommonArg(state, i); |
| } |
| for (argc--, argv++; argc > 0; argc--, argv++) |
| { |
| if (strcmp(argv[0], "--help") == 0) { |
| usage(); |
| return 0; |
| } |
| |
| else if (strcmp(argv[0], "--font") == 0) |
| { |
| argc--; |
| argv++; |
| |
| if (argc > 0) |
| fontname = argv[0]; |
| else { |
| usage(); |
| return 0; |
| } |
| } |
| } |
| |
| if (!SDLTest_CommonInit(state)) { |
| return 2; |
| } |
| |
| |
| #ifdef HAVE_SDL_TTF |
| /* Initialize fonts */ |
| TTF_Init(); |
| |
| font = TTF_OpenFont(fontname, DEFAULT_PTSIZE); |
| if (! font) |
| { |
| SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Failed to find font: %s\n", TTF_GetError()); |
| exit(-1); |
| } |
| #endif |
| |
| SDL_Log("Using font: %s\n", fontname); |
| atexit(SDL_Quit); |
| |
| 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)) { |
| SDLTest_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; |
| } |
| |
| SDL_Log("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 (event.text.text[0] == '\0' || event.text.text[0] == '\n' || |
| markedRect.w < 0) |
| break; |
| |
| SDL_Log("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)); |
| |
| SDL_Log("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: |
| SDL_Log("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; |
| |
| } |
| } |
| } |
| CleanupVideo(); |
| SDLTest_CommonQuit(state); |
| return 0; |
| } |
| |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |