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glfw/tests/input_text.c
Takuro Ashie 0c811598ae Add text input focus toggle to input_text test 
Expose glfwSetTextInputFocus in the input_text test so IME and text input
focus behavior can be exercised independently.

The UI starts in compatibility mode, then shows explicit Focus In or
Focus Out after the toggle is used.
2026-09-14 08:55:41 +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;
enum text_input_focus_status
{
TEXT_INPUT_FOCUS_COMPATIBLE,
TEXT_INPUT_FOCUS_IN,
TEXT_INPUT_FOCUS_OUT
};
static enum text_input_focus_status currentTextInputFocusStatus =
TEXT_INPUT_FOCUS_COMPATIBLE;
#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, 3);
if (nk_button_label(nk, "Toggle IME status"))
{
glfwSetInputMode(window, GLFW_IME, !currentIMEStatus);
}
if (nk_button_label(nk, "Toggle text input focus"))
{
if (currentTextInputFocusStatus == TEXT_INPUT_FOCUS_IN)
{
glfwSetTextInputFocus(window, GLFW_FALSE);
currentTextInputFocusStatus = TEXT_INPUT_FOCUS_OUT;
}
else
{
glfwSetTextInputFocus(window, GLFW_TRUE);
currentTextInputFocusStatus = TEXT_INPUT_FOCUS_IN;
}
}
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)
{
const char* textInputFocusStatus = "Text input focus: compatible";
switch (currentTextInputFocusStatus)
{
case TEXT_INPUT_FOCUS_IN:
textInputFocusStatus = "Text input focus: Focus In";
break;
case TEXT_INPUT_FOCUS_OUT:
textInputFocusStatus = "Text input focus: Focus Out";
break;
case TEXT_INPUT_FOCUS_COMPATIBLE:
break;
}
nk_layout_row_dynamic(nk, height, 2);
nk_value_bool(nk, "IME status", currentIMEStatus);
nk_label(nk, textInputFocusStatus, NK_TEXT_LEFT);
}
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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