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glfw/tests/input_text.c
Takuro Ashie 7ae1427156 Don't link Fontconfig 
Load it dynamically instead.
2024-05-21 22:48:18 +09:00

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//========================================================================
// Input Test
// Copyright (c) Camilla Löwy <elmindreda@glfw.org>
// Copyright (c) Daijiro Fukuda <fukuda@clear-code.com>
// Copyright (c) Takuro Ashie <ashie@clear-code.com>
//
// 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, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would
// be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not
// be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
// distribution.
//
//========================================================================
//
// For font handiling, I reffered to https://github.com/Immediate-Mode-UI/Nuklear/wiki/Complete-font-guide.
// For nuklear handling, I reffered to tests/window.c.
//
// Currently, it is made for Japanese input only.
// You have to select the correct font to display Japanese texts.
// To handle other languages, you need to add correct ranges to nk_font_config.
//
// On X11 or Wayland, you can choose a font by GUI if "fontconfig" libarary is enabled.
//
// On Win32, "Yu Mincho" is selected by default if it is installed. This font is
// included in the FOD packages, so it will be installed automatically when you
// enable Japanese input on your environment, or you can install it by
// "Manage optional features" in "Apps & features".
// Refer: https://learn.microsoft.com/en-us/typography/fonts/windows_10_font_list#japanese-supplemental-fonts
//
// On macOS, "Arial Unicode MS" is selected by default if it is installed.
// I assume that this font is usually installed, but if it is not installed,
// please install it manually.
//
// You can also specify a TTF filepath and use your own favorite font by setting
// TTF_FONT_FILEPATH below.
//
//========================================================================
// Please comment out and set font filepath here to change default font
// #define TTF_FONT_FILEPATH ""
#define GLAD_GL_IMPLEMENTATION
#include <glad/gl.h>
#define GLFW_INCLUDE_NONE
#include <GLFW/glfw3.h>
#include <stdarg.h>
#define NK_IMPLEMENTATION
#define NK_INCLUDE_STANDARD_IO
#define NK_KEYSTATE_BASED_INPUT
#define NK_INCLUDE_FIXED_TYPES
#define NK_INCLUDE_FONT_BAKING
#define NK_INCLUDE_DEFAULT_FONT
#define NK_INCLUDE_DEFAULT_ALLOCATOR
#define NK_INCLUDE_VERTEX_BUFFER_OUTPUT
#define NK_INCLUDE_STANDARD_VARARGS
#define NK_BUTTON_TRIGGER_ON_RELEASE
// To increase the number of characters that can be entered at one time
#define NK_INPUT_MAX 64
#include <nuklear.h>
#define NK_GLFW_GL2_IMPLEMENTATION
#include <nuklear_glfw_gl2.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include "getopt.h"
#define MAX_BUFFER_LEN 1024
// https://github.com/Immediate-Mode-UI/Nuklear/wiki/Complete-font-guide
// https://unicode-table.com
// To handle other languages, you need to fix these ranges.
static nk_rune rangesJapan[] = {
0x0020, 0x007E, // Basic Latin
0x2000, 0x206F, // General Punctuation
0x3000, 0x303F, // CJK Symbols and Punctuation
0x3041, 0x309F, // Hiragana
0x30A0, 0x30FF, // Katakana
0x4E00, 0x9FFF, // All Kanji
0xFF01, 0xFFEF, // Halfwidth and Fullwidth Forms
0
};
#define MAX_FONTS_LEN 512
#define MAX_FONT_FAMILY_NAME_LEN 128
#define MAX_FONT_FILEPATH_LEN 256
static struct nk_font* currentFont;
static char** fontFamilyNames;
static char** fontFilePaths;
static int fontNum = 0;
static int currentFontIndex = 0;
static int currentIMEStatus = GLFW_FALSE;
#define MAX_PREEDIT_LEN 128
static char preeditBuf[MAX_PREEDIT_LEN] = "";
// Assuming that the page-size is 10 at most.
static char candidateBuf[9][MAX_PREEDIT_LEN];
static int candidatePageSize = 0;
void usage(void)
{
printf("Usage: input_text [-h] [-s] [-c]\n");
printf("Options:\n");
printf(" -s Use on-the-spot sytle on X11. This is ignored on other platforms.\n");
printf(" -c Use manage-preedit-candidate on Win32. This is ignored on other platforms.\n");
printf(" -h Show this help\n");
}
static size_t encode_utf8(char* s, unsigned int ch)
{
size_t count = 0;
if (ch < 0x80)
s[count++] = (char) ch;
else if (ch < 0x800)
{
s[count++] = (ch >> 6) | 0xc0;
s[count++] = (ch & 0x3f) | 0x80;
}
else if (ch < 0x10000)
{
s[count++] = (ch >> 12) | 0xe0;
s[count++] = ((ch >> 6) & 0x3f) | 0x80;
s[count++] = (ch & 0x3f) | 0x80;
}
else if (ch < 0x110000)
{
s[count++] = (ch >> 18) | 0xf0;
s[count++] = ((ch >> 12) & 0x3f) | 0x80;
s[count++] = ((ch >> 6) & 0x3f) | 0x80;
s[count++] = (ch & 0x3f) | 0x80;
}
return count;
}
static int add_font(const char* familyName, const char* ttfFilePath, int checkExistence)
{
if (MAX_FONTS_LEN <= fontNum)
return GLFW_FALSE;
if (MAX_FONT_FAMILY_NAME_LEN <= strlen(familyName) || MAX_FONT_FILEPATH_LEN <= strlen(ttfFilePath))
return GLFW_FALSE;
if (checkExistence)
{
FILE* fp = fopen(ttfFilePath, "rb");
if (!fp)
return GLFW_FALSE;
fclose(fp);
}
fontFamilyNames[fontNum] = (char*) malloc(1 + strlen(familyName));
assert(fontFamilyNames[fontNum]);
strcpy(fontFamilyNames[fontNum], familyName);
fontFilePaths[fontNum] = (char*) malloc(1 + strlen(ttfFilePath));
assert(fontFilePaths[fontNum]);
strcpy(fontFilePaths[fontNum], ttfFilePath);
fontNum++;
return GLFW_TRUE;
}
static int replace_font(int index, const char* familyName, const char* ttfFilePath, int checkExistence)
{
if (index == 0 || fontNum <= index)
return GLFW_FALSE;
if (MAX_FONT_FAMILY_NAME_LEN <= strlen(familyName) || MAX_FONT_FILEPATH_LEN <= strlen(ttfFilePath))
return GLFW_FALSE;
if (checkExistence)
{
FILE* fp = fopen(ttfFilePath, "rb");
if (!fp)
return GLFW_FALSE;
fclose(fp);
}
free(fontFamilyNames[index]);
free(fontFilePaths[index]);
fontFamilyNames[index] = (char*) malloc(1 + strlen(familyName));
assert(fontFamilyNames[index]);
strcpy(fontFamilyNames[index], familyName);
fontFilePaths[index] = (char*) malloc(1 + strlen(ttfFilePath));
assert(fontFilePaths[index]);
strcpy(fontFilePaths[index], ttfFilePath);
return GLFW_TRUE;
}
#if defined(TTF_FONT_FILEPATH)
static int load_custom_font()
{
if (MAX_FONTS_LEN <= fontNum)
return GLFW_FALSE;
if (!(TTF_FONT_FILEPATH && *TTF_FONT_FILEPATH))
return GLFW_FALSE;
return add_font("Custom", TTF_FONT_FILEPATH, GLFW_TRUE);
}
#endif
#if defined(FONTCONFIG_ENABLED)
#include <dlfcn.h>
typedef struct _FcConfig FcConfig;
typedef struct _FcFontSet
{
int nfont;
int sfont;
void **fonts;
} FcFontSet;
typedef struct _FcValue
{
int type;
union
{
const unsigned char* s;
double d;
} u;
} FcValue;
struct FcLib
{
void* handle;
void* (*InitLoadConfigAndFonts)(void);
void* (*ConfigGetFonts)(void*, int);
void (*ConfigDestroy)(void*);
int (*PatternGet)(const void*, const char*, int, void*);
} fcLib;
static int init_fontconfig(void)
{
if (fcLib.handle)
return GLFW_TRUE;
fcLib.handle = dlopen("libfontconfig.so.1", RTLD_LAZY | RTLD_LOCAL);
if (!fcLib.handle)
return GLFW_FALSE;
#define GET_FC_SYMBOL(name) \
fcLib.name = dlsym(fcLib.handle, "Fc"#name); \
if (!fcLib.name) \
{ \
dlclose(fcLib.handle); \
fcLib.handle = NULL; \
return GLFW_FALSE; \
}
GET_FC_SYMBOL(InitLoadConfigAndFonts);
GET_FC_SYMBOL(ConfigGetFonts);
GET_FC_SYMBOL(ConfigDestroy);
GET_FC_SYMBOL(PatternGet);
#undef GET_FC_SYMBOL
return GLFW_TRUE;
}
static void load_font_list_by_fontconfig()
{
FcConfig* config;
FcFontSet* fontset;
if (!init_fontconfig())
return;
config = fcLib.InitLoadConfigAndFonts();
fontset = fcLib.ConfigGetFonts(config, 0 /* FcSetSystem */);
if (!fontset)
{
printf("load_font_list_by_fontconfig failed.\n");
fcLib.ConfigDestroy(config);
return;
}
for (int i = 0; i < fontset->nfont; i++)
{
FcValue fvalue, dvalue;
if (fcLib.PatternGet(fontset->fonts[i], "family", 0, &fvalue) == 0)
{
if (fcLib.PatternGet(fontset->fonts[i], "file", 0, &dvalue) == 0)
{
const char* familyName = (const char*) fvalue.u.s;
const char* filePath = (const char*) dvalue.u.s;
int existsFamily = GLFW_FALSE;
int existingIndex = 0;
if (!strstr(filePath, ".ttf"))
{
continue;
}
for (int j = 1; j < fontNum; ++j)
{
if (strcmp(fontFamilyNames[j], familyName) == 0)
{
existsFamily = GLFW_TRUE;
existingIndex = j;
break;
}
}
if (existsFamily)
{
// Prefer "regular" to the others.
if (strstr(filePath, "regular") || strstr(filePath, "Regular"))
replace_font(existingIndex, familyName, filePath, GLFW_FALSE);
}
else
add_font(familyName, filePath, GLFW_FALSE);
if (MAX_FONTS_LEN <= fontNum)
{
printf("MAX_FONTS_LEN reached. Could not load some fonts.\n");
break;
}
}
}
}
fcLib.ConfigDestroy(config);
}
#endif
static void load_default_font_for_each_platform()
{
int hasSucceeded = GLFW_FALSE;
if (MAX_FONTS_LEN <= fontNum)
return;
if (glfwGetPlatform() == GLFW_PLATFORM_COCOA)
hasSucceeded = add_font("Arial Unicode MS", "/Library/Fonts/Arial Unicode.ttf", GLFW_TRUE);
else if(glfwGetPlatform() == GLFW_PLATFORM_WIN32)
{
// Use "Yu Mincho" since it is the only TTF for Japanese in the FOD packages on Windows10 and Windows11.
// https://learn.microsoft.com/en-us/typography/fonts/windows_10_font_list#japanese-supplemental-fonts
char filepath[MAX_FONT_FILEPATH_LEN];
char* winDir = getenv("systemroot");
if (winDir)
snprintf(filepath, MAX_FONT_FILEPATH_LEN, "%s\\Fonts\\Yumin.ttf", winDir);
else
strcpy(filepath, "C:\\Windows\\Fonts\\Yumin.ttf");
hasSucceeded = add_font("Yu Mincho Regular", filepath, GLFW_TRUE);
}
if (hasSucceeded)
currentFontIndex = fontNum - 1;
}
static void init_font_list()
{
int useCustomFont = GLFW_FALSE;
int customFontIndex = 0;
fontFamilyNames = (char**) malloc(sizeof(char*) * MAX_FONTS_LEN);
assert(fontFamilyNames);
fontFilePaths = (char**) malloc(sizeof(char*) * MAX_FONTS_LEN);
assert(fontFilePaths);
fontFamilyNames[0] = "GLFW default";
fontFilePaths[0] = "";
fontNum++;
#if defined(TTF_FONT_FILEPATH)
useCustomFont = load_custom_font();
if (useCustomFont)
customFontIndex = fontNum - 1;
#endif
load_default_font_for_each_platform();
#if defined(FONTCONFIG_ENABLED)
load_font_list_by_fontconfig();
#endif
if (useCustomFont)
currentFontIndex = customFontIndex;
}
static void deinit_font_list()
{
for (int i = 1; i < fontNum; ++i)
{
free(fontFamilyNames[i]);
free(fontFilePaths[i]);
}
free(fontFamilyNames);
free(fontFilePaths);
}
// https://github.com/Immediate-Mode-UI/Nuklear/wiki/Complete-font-guide
static void update_font(struct nk_context* nk, float height)
{
struct nk_font_atlas* atlas;
nk_glfw3_font_stash_begin(&atlas);
if (currentFontIndex == 0)
{
currentFont = nk_font_atlas_add_default(atlas, height, 0);
}
else
{
struct nk_font* new_font;
struct nk_font_config cfg;
cfg = nk_font_config(0);
cfg.range = rangesJapan;
cfg.oversample_h = 1;
cfg.oversample_v = 1;
cfg.pixel_snap = true;
new_font = nk_font_atlas_add_from_file(atlas, fontFilePaths[currentFontIndex], height, &cfg);
if (new_font)
{
currentFont = new_font;
printf("Succeeded to load font file: %s\n", fontFilePaths[currentFontIndex]);
}
else
printf("Failed to load font file: %s\n", fontFilePaths[currentFontIndex]);
}
nk_glfw3_font_stash_end();
nk_style_set_font(nk, &currentFont->handle);
}
static void set_menu_buttons(GLFWwindow* window, struct nk_context* nk, int height)
{
static int windowedX, windowedY, windowedWidth, windowedHeight;
nk_layout_row_dynamic(nk, height, 2);
if (nk_button_label(nk, "Toggle Fullscreen"))
{
if (glfwGetWindowMonitor(window))
{
glfwSetWindowMonitor(window, NULL,
windowedX, windowedY,
windowedWidth, windowedHeight, 0);
}
else
{
GLFWmonitor* monitor = glfwGetPrimaryMonitor();
const GLFWvidmode* mode = glfwGetVideoMode(monitor);
glfwGetWindowPos(window, &windowedX, &windowedY);
glfwGetWindowSize(window, &windowedWidth, &windowedHeight);
glfwSetWindowMonitor(window, monitor,
0, 0, mode->width, mode->height,
mode->refreshRate);
}
}
{
int auto_iconify = glfwGetWindowAttrib(window, GLFW_AUTO_ICONIFY);
if (nk_checkbox_label(nk, "Auto Iconify", &auto_iconify))
glfwSetWindowAttrib(window, GLFW_AUTO_ICONIFY, auto_iconify);
}
}
static int set_font_selecter(GLFWwindow* window, struct nk_context* nk, int height, int fontHeight)
{
int newSelectedIndex;
nk_layout_row_begin(nk, NK_DYNAMIC, height, 2);
nk_layout_row_push(nk, 1.f / 3.f);
nk_label(nk, "Font", NK_TEXT_LEFT);
nk_layout_row_push(nk, 2.f / 3.f);
newSelectedIndex = nk_combo(nk, (const char**) fontFamilyNames, fontNum, currentFontIndex, fontHeight, nk_vec2(300, 400));
nk_layout_row_end(nk);
if (newSelectedIndex == currentFontIndex)
return GLFW_FALSE;
currentFontIndex = newSelectedIndex;
return GLFW_TRUE;
}
static void set_ime_buttons(GLFWwindow* window, struct nk_context* nk, int height)
{
nk_layout_row_dynamic(nk, height, 2);
if (nk_button_label(nk, "Toggle IME status"))
{
glfwSetInputMode(window, GLFW_IME, !currentIMEStatus);
}
if (nk_button_label(nk, "Reset preedit text"))
{
glfwResetPreeditText(window);
}
}
static void set_preedit_cursor_edit(GLFWwindow* window, struct nk_context* nk, int height, int* isAutoUpdating)
{
static int lastX = -1, lastY = -1, lastW = -1, lastH = -1;
static char xBuf[12] = "", yBuf[12] = "", wBuf[12] = "", hBuf[12] = "";
const nk_flags flags = NK_EDIT_FIELD |
NK_EDIT_SIG_ENTER |
NK_EDIT_GOTO_END_ON_ACTIVATE;
nk_flags events;
int x, y, w, h;
glfwGetPreeditCursorRectangle(window, &x, &y, &w, &h);
if (x != lastX)
sprintf(xBuf, "%i", x);
if (y != lastY)
sprintf(yBuf, "%i", y);
if (w != lastW)
sprintf(wBuf, "%i", w);
if (h != lastH)
sprintf(hBuf, "%i", h);
nk_layout_row_begin(nk, NK_DYNAMIC, height, 5);
nk_layout_row_push(nk, 4.f / 9.f);
nk_label(nk, "Preedit cursor (x,y,w,h)", NK_TEXT_LEFT);
nk_layout_row_push(nk, 1.f / 9.f);
events = nk_edit_string_zero_terminated(nk, flags, xBuf,
sizeof(xBuf),
nk_filter_decimal);
if (events & NK_EDIT_COMMITED)
{
x = atoi(xBuf);
*isAutoUpdating = GLFW_FALSE;
glfwSetPreeditCursorRectangle(window, x, y, w, h);
}
else if (events & NK_EDIT_DEACTIVATED)
sprintf(xBuf, "%i", x);
nk_layout_row_push(nk, 1.f / 9.f);
events = nk_edit_string_zero_terminated(nk, flags, yBuf,
sizeof(yBuf),
nk_filter_decimal);
if (events & NK_EDIT_COMMITED)
{
y = atoi(yBuf);
*isAutoUpdating = GLFW_FALSE;
glfwSetPreeditCursorRectangle(window, x, y, w, h);
}
else if (events & NK_EDIT_DEACTIVATED)
sprintf(yBuf, "%i", y);
nk_layout_row_push(nk, 1.f / 9.f);
events = nk_edit_string_zero_terminated(nk, flags, wBuf,
sizeof(wBuf),
nk_filter_decimal);
if (events & NK_EDIT_COMMITED)
{
w = atoi(wBuf);
*isAutoUpdating = GLFW_FALSE;
glfwSetPreeditCursorRectangle(window, x, y, w, h);
}
else if (events & NK_EDIT_DEACTIVATED)
sprintf(wBuf, "%i", w);
nk_layout_row_push(nk, 1.f / 9.f);
events = nk_edit_string_zero_terminated(nk, flags, hBuf,
sizeof(hBuf),
nk_filter_decimal);
if (events & NK_EDIT_COMMITED)
{
h = atoi(hBuf);
*isAutoUpdating = GLFW_FALSE;
glfwSetPreeditCursorRectangle(window, x, y, w, h);
}
else if (events & NK_EDIT_DEACTIVATED)
sprintf(hBuf, "%i", h);
nk_layout_row_push(nk, 1.f / 9.f);
nk_checkbox_label(nk, "Auto", isAutoUpdating);
nk_layout_row_end(nk);
lastX = x;
lastY = y;
lastW = w;
lastH = h;
}
static void set_ime_stauts_labels(GLFWwindow* window, struct nk_context* nk, int height)
{
nk_layout_row_dynamic(nk, height, 1);
nk_value_bool(nk, "IME status", currentIMEStatus);
}
static void set_preedit_labels(GLFWwindow* window, struct nk_context* nk, int height)
{
nk_layout_row_begin(nk, NK_DYNAMIC, height, 5);
nk_layout_row_push(nk, 1.f / 3.f);
nk_label(nk, "Preedit info:", NK_TEXT_LEFT);
nk_layout_row_push(nk, 2.f / 3.f);
nk_label(nk, (const char*) preeditBuf, NK_TEXT_LEFT);
nk_layout_row_end(nk);
}
static void set_candidate_labels(GLFWwindow* window, struct nk_context* nk)
{
for (int i = 0; i < 5; ++i)
{
nk_layout_row_begin(nk, NK_DYNAMIC, 30, 3);
nk_layout_row_push(nk, 1.f / 3.f);
if (i == 0)
nk_label(nk, "Candidates:", NK_TEXT_LEFT);
else
nk_label(nk, "", NK_TEXT_LEFT);
nk_layout_row_push(nk, 1.f / 3.f);
if (candidatePageSize > i)
nk_label(nk, (const char*) candidateBuf[i], NK_TEXT_LEFT);
nk_layout_row_push(nk, 1.f / 3.f);
if (candidatePageSize > i + 5)
nk_label(nk, (const char*) candidateBuf[i + 5], NK_TEXT_LEFT);
nk_layout_row_end(nk);
}
}
// If it is possible to take the text-cursor position calculated in `nk_do_edit` function in `deps/nuklear.h`,
// we can set preedit-cursor position more easily.
// However, there doesn't seem to be a way to do that, so this does a simplified calculation only for the end
// of the text. (Can not trace the cursor movement)
static void update_cursor_pos(GLFWwindow* window, struct nk_context* nk, struct nk_user_font* f,
char* boxBuffer, int boxLen, int boxX, int boxY)
{
float lineWidth = 0;
int totalLines = 1;
const char* text;
int textPos = 0;
struct nk_str nkString;
nk_str_init_fixed(&nkString, boxBuffer, (nk_size) MAX_BUFFER_LEN);
nkString.buffer.allocated = (nk_size) boxLen;
nkString.len = nk_utf_len(boxBuffer, boxLen);
text = nk_str_get_const(&nkString);
while (textPos < boxLen)
{
nk_rune unicode = 0;
int remainedBoxLen = boxLen - textPos;
int nextGlyphSize = nk_utf_decode(text + textPos, &unicode, remainedBoxLen);
if (!nextGlyphSize)
break;
if (unicode == '\n')
{
textPos++;
totalLines++;
lineWidth = 0;
continue;
}
textPos += nextGlyphSize;
lineWidth += f->width(f->userdata, f->height, text + textPos, nextGlyphSize);
}
{
int lineHeight = f->height + nk->style.edit.row_padding;
int cursorPosX = boxX + lineWidth;
int cursorPosY = boxY + lineHeight * (totalLines - 1);
int cursorHeight = lineHeight;
int cursorWidth;
// Keep the value of width since it doesn't need to be updated.
glfwGetPreeditCursorRectangle(window, NULL, NULL, &cursorWidth, NULL);
glfwSetPreeditCursorRectangle(window, cursorPosX, cursorPosY, cursorWidth, cursorHeight);
}
}
static void ime_callback(GLFWwindow* window)
{
currentIMEStatus = glfwGetInputMode(window, GLFW_IME);
printf("IME switched: %s\n", currentIMEStatus ? "ON" : "OFF");
}
static void preedit_callback(GLFWwindow* window, int preeditCount,
unsigned int* preeditString, int blockCount,
int* blockSizes, int focusedBlock, int caret)
{
int blockIndex = -1, remainingBlockSize = 0;
if (preeditCount == 0 || blockCount == 0)
{
strcpy(preeditBuf, "(empty)");
return;
}
strcpy(preeditBuf, "");
for (int i = 0; i < preeditCount; i++)
{
char encoded[5] = "";
size_t encodedCount = 0;
if (i == caret)
{
if (strlen(preeditBuf) + strlen("|") < MAX_PREEDIT_LEN)
strcat(preeditBuf, "|");
}
if (remainingBlockSize == 0)
{
if (blockIndex == focusedBlock)
{
if (strlen(preeditBuf) + strlen("]") < MAX_PREEDIT_LEN)
strcat(preeditBuf, "]");
}
blockIndex++;
remainingBlockSize = blockSizes[blockIndex];
if (blockIndex == focusedBlock)
{
if (strlen(preeditBuf) + strlen("[") < MAX_PREEDIT_LEN)
strcat(preeditBuf, "[");
}
}
encodedCount = encode_utf8(encoded, preeditString[i]);
encoded[encodedCount] = '\0';
if (strlen(preeditBuf) + strlen(encoded) < MAX_PREEDIT_LEN)
strcat(preeditBuf, encoded);
remainingBlockSize--;
}
if (blockIndex == focusedBlock)
{
if (strlen(preeditBuf) + strlen("]") < MAX_PREEDIT_LEN)
strcat(preeditBuf, "]");
}
if (caret == preeditCount)
{
if (strlen(preeditBuf) + strlen("|") < MAX_PREEDIT_LEN)
strcat(preeditBuf, "|");
}
}
static void candidate_callback(GLFWwindow* window, int candidates_count,
int selected_index, int page_start, int page_size)
{
int i, j;
candidatePageSize = page_size;
for (i = 0; i < page_size; ++i)
{
int index = i + page_start;
int textCount;
unsigned int* text = glfwGetPreeditCandidate(window, index, &textCount);
if (index == selected_index)
strcpy(candidateBuf[i], "> ");
else
strcpy(candidateBuf[i], "");
for (j = 0; j < textCount; ++j)
{
char encoded[5] = "";
encode_utf8(encoded, text[j]);
if (strlen(candidateBuf[i]) + strlen(encoded) < MAX_PREEDIT_LEN)
strcat(candidateBuf[i], encoded);
}
}
}
int main(int argc, char** argv)
{
GLFWwindow* window;
struct nk_context* nk;
int width, height;
char boxBuffer[MAX_BUFFER_LEN] = "Input text here.";
int boxLen = strlen(boxBuffer);
int isAutoUpdatingCursorPosEnabled = GLFW_TRUE;
int managePreeditCandidate = GLFW_FALSE;
int ch;
while ((ch = getopt(argc, argv, "hsc")) != -1)
{
switch (ch)
{
case 'h':
usage();
exit(EXIT_SUCCESS);
case 's':
glfwInitHint(GLFW_X11_ONTHESPOT, GLFW_TRUE);
break;
case 'c':
glfwInitHint(GLFW_MANAGE_PREEDIT_CANDIDATE, GLFW_TRUE);
managePreeditCandidate = GLFW_TRUE;
break;
}
}
if (!glfwInit())
exit(EXIT_FAILURE);
glfwWindowHint(GLFW_SCALE_TO_MONITOR, GLFW_TRUE);
glfwWindowHint(GLFW_WIN32_KEYBOARD_MENU, GLFW_TRUE);
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 2);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 1);
window = glfwCreateWindow(600, 600, "Input Text", NULL, NULL);
if (!window)
{
glfwTerminate();
exit(EXIT_FAILURE);
}
currentIMEStatus = glfwGetInputMode(window, GLFW_IME);
glfwSetPreeditCursorRectangle(window, 0, 0, 1, 1);
glfwSetIMEStatusCallback(window, ime_callback);
glfwSetPreeditCallback(window, preedit_callback);
glfwSetPreeditCandidateCallback(window, candidate_callback);
glfwMakeContextCurrent(window);
gladLoadGL(glfwGetProcAddress);
glfwSwapInterval(0);
nk = nk_glfw3_init(window, NK_GLFW3_INSTALL_CALLBACKS);
init_font_list();
update_font(nk, 18);
while (!glfwWindowShouldClose(window))
{
struct nk_rect area;
glfwGetWindowSize(window, &width, &height);
area = nk_rect(0.f, 0.f, (float) width, (float) height);
nk_window_set_bounds(nk, "main", area);
nk_glfw3_new_frame();
if (nk_begin(nk, "main", area, 0))
{
set_menu_buttons(window, nk, 30);
if (set_font_selecter(window, nk, 30, 18))
update_font(nk, 18);
set_ime_buttons(window, nk, 30);
set_preedit_cursor_edit(window, nk, 30, &isAutoUpdatingCursorPosEnabled);
set_ime_stauts_labels(window, nk, 30);
set_preedit_labels(window, nk, 30);
if (managePreeditCandidate)
set_candidate_labels(window, nk);
nk_layout_row_dynamic(nk, height - 250, 1);
nk_edit_string(nk, NK_EDIT_BOX, boxBuffer, &boxLen, MAX_BUFFER_LEN, nk_filter_default);
}
nk_end(nk);
glClear(GL_COLOR_BUFFER_BIT);
nk_glfw3_render(NK_ANTI_ALIASING_ON);
glfwSwapBuffers(window);
if (isAutoUpdatingCursorPosEnabled)
// I don't know how to get the layout info of `nk_edit_string`.
update_cursor_pos(window, nk, &currentFont->handle, boxBuffer, boxLen, 10,
managePreeditCandidate ? 385 : 220);
glfwWaitEvents();
}
deinit_font_list();
nk_glfw3_shutdown();
glfwTerminate();
exit(EXIT_SUCCESS);
}
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