abandon input libraries and do it ourselves

CMakeLists.txt

@@ -1,7 +1,5 @@
 CMAKE_MINIMUM_REQUIRED(VERSION 3.0)
 
-LIST(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
-
 FIND_PACKAGE(PkgConfig)
 FIND_PACKAGE(Threads)
 

cmake/FindReadline.cmake

@@ -1,49 +0,0 @@
-# Code copied from sethhall@github
-#
-# - Try to find readline include dirs and libraries 
-#
-# Usage of this module as follows:
-#
-#     find_package(Readline)
-#
-# Variables used by this module, they can change the default behaviour and need
-# to be set before calling find_package:
-#
-#  Readline_ROOT_DIR         Set this variable to the root installation of
-#                            readline if the module has problems finding the
-#                            proper installation path.
-#
-# Variables defined by this module:
-#
-#  READLINE_FOUND            System has readline, include and lib dirs found
-#  Readline_INCLUDE_DIR      The readline include directories. 
-#  Readline_LIBRARY          The readline library.
-
-find_path(Readline_ROOT_DIR
-    NAMES include/readline/readline.h
-)
-
-find_path(Readline_INCLUDE_DIR
-    NAMES readline/readline.h
-    HINTS ${Readline_ROOT_DIR}/include
-)
-
-find_library(Readline_LIBRARY
-    NAMES readline
-    HINTS ${Readline_ROOT_DIR}/lib
-)
-
-if(Readline_INCLUDE_DIR AND Readline_LIBRARY AND Ncurses_LIBRARY)
-  set(READLINE_FOUND TRUE)
-else(Readline_INCLUDE_DIR AND Readline_LIBRARY AND Ncurses_LIBRARY)
-  FIND_LIBRARY(Readline_LIBRARY NAMES readline)
-  include(FindPackageHandleStandardArgs)
-  FIND_PACKAGE_HANDLE_STANDARD_ARGS(Readline DEFAULT_MSG Readline_INCLUDE_DIR Readline_LIBRARY )
-  MARK_AS_ADVANCED(Readline_INCLUDE_DIR Readline_LIBRARY)
-endif(Readline_INCLUDE_DIR AND Readline_LIBRARY AND Ncurses_LIBRARY)
-
-mark_as_advanced(
-    Readline_ROOT_DIR
-    Readline_INCLUDE_DIR
-    Readline_LIBRARY
-)

ncdc/CMakeLists.txt

@@ -1,16 +1,20 @@
 CMAKE_MINIMUM_REQUIRED(VERSION 3.0)
 
-PKG_CHECK_MODULES(NCURSES REQUIRED ncurses)
+PKG_CHECK_MODULES(NCURSES REQUIRED ncursesw)
 PKG_CHECK_MODULES(PANEL REQUIRED panel)
-FIND_PACKAGE(Readline)
+PKG_CHECK_MODULES(EDIT REQUIRED libedit)
 
 SET(TARGET "ncdc")
 
 SET(SOURCES
+  "include/ncdc/input.h"
   "include/ncdc/mainwindow.h"
   "include/ncdc/ncdc.h"
+  "src/emacs.c"
+  "src/input.c"
   "src/mainwindow.c"
   "src/ncdc.c"
+  "src/util.c"
   )
 
 INCLUDE_DIRECTORIES(
@@ -22,7 +26,7 @@ INCLUDE_DIRECTORIES(
   ${GLIB2_INCLUDE_DIRS}
   ${NCURSES_INCLUDE_DIRS}
   ${PANEL_INCLUDE_DIRS}
-  ${Readline_INCLUDE_DIR}
+  ${EDIT_INCLUDE_DIRS}
   )
 
 ADD_EXECUTABLE(${TARGET} ${SOURCES})
@@ -31,5 +35,5 @@ TARGET_LINK_LIBRARIES(${TARGET}
   ${GLIB2_LIBRARIES}
   ${NCURSES_LIBRARIES}
   ${PANEL_LIBRARIES}
-  ${Readline_LIBRARY}
+  ${EDIT_LIBRARIES}
   )

ncdc/include/ncdc/input.h

@@ -0,0 +1,40 @@
+#ifndef NCDC_INPUT_H
+#define NCDC_INPUT_H
+
+#include <ncdc/ncdc.h>
+
+struct ncdc_input_;
+typedef struct ncdc_input_ *ncdc_input_t;
+
+typedef void (*ncdc_keybinding_t)(ncdc_input_t p);
+
+typedef bool (*ncdc_input_callback_t)(ncdc_input_t p, wchar_t const *str,
+                                      size_t len, void *data);
+
+typedef struct {
+    char const *key;
+    char const *name;
+    ncdc_keybinding_t handler;
+} ncdc_input_keybinding_t;
+
+#define NCDC_BINDING(k, n, f) { k, n, f }
+
+extern ncdc_input_keybinding_t emacs[];
+
+ncdc_input_t ncdc_input_new(void);
+
+void ncdc_input_feed(ncdc_input_t input, wchar_t c);
+int ncdc_input_cursor(ncdc_input_t input);
+char const *ncdc_input_buffer(ncdc_input_t input);
+void ncdc_input_draw(ncdc_input_t input, WINDOW *win);
+
+void ncdc_input_set_callback(ncdc_input_t i, ncdc_input_callback_t c, void *a);
+
+/* keybinding functions
+ */
+void ncdc_input_backward(ncdc_input_t i);
+void ncdc_input_forward(ncdc_input_t i);
+void ncdc_input_delete(ncdc_input_t input);
+void ncdc_input_delete_backward(ncdc_input_t input);
+
+#endif

ncdc/include/ncdc/mainwindow.h

@@ -6,9 +6,9 @@
 struct ncdc_mainwindow_;
 typedef struct ncdc_mainwindow_ *ncdc_mainwindow_t;
 
-bool ncdc_mainwindow_init(void);
+ncdc_mainwindow_t ncdc_mainwindow_new(void);
 
-void ncdc_mainwindow_feed(int ch);
-void ncdc_mainwindow_refresh(void);
+void ncdc_mainwindow_refresh(ncdc_mainwindow_t n);
+void ncdc_mainwindow_input_ready(ncdc_mainwindow_t n);
 
 #endif

ncdc/include/ncdc/ncdc.h

@@ -5,6 +5,7 @@
 #include <stdint.h>
 #include <stdbool.h>
 #include <string.h>
+#include <wctype.h>
 
 #include <unistd.h>
 #include <sys/stat.h>
@@ -23,8 +24,8 @@
 
 #include <curses.h>
 #include <panel.h>
-#include <readline/history.h>
-#include <readline/readline.h>
+
+#include <locale.h>
 
 #include <dc/refable.h>
 #include <dc/api.h>
@@ -35,4 +36,7 @@
 
 extern char *ncdc_private_dir;
 
+int strwidth(char const *string);
+char *read_char(FILE *stream);
+
 #endif

ncdc/src/emacs.c

@@ -0,0 +1,11 @@
+#include <ncdc/input.h>
+
+ncdc_input_keybinding_t emacs[] = {
+    NCDC_BINDING("KEY_RIGHT",     "forward",  ncdc_input_forward),
+    NCDC_BINDING("KEY_LEFT",      "backward", ncdc_input_backward),
+    NCDC_BINDING("^F",            "forward",  ncdc_input_forward),
+    NCDC_BINDING("^B",            "backward", ncdc_input_backward),
+    NCDC_BINDING("^D",            "delete",   ncdc_input_delete),
+    NCDC_BINDING("KEY_BACKSPACE", "delete",   ncdc_input_delete_backward),
+    NCDC_BINDING(NULL, NULL, NULL)
+};

ncdc/src/input.c

@@ -0,0 +1,151 @@
+#include <ncdc/input.h>
+#include <ncdc/ncdc.h>
+
+struct ncdc_input_
+{
+    dc_refable_t ref;
+
+    GArray *buffer;
+    int cursor;
+    ncdc_input_keybinding_t *keys;
+
+    ncdc_input_callback_t callback;
+    void *callback_arg;
+};
+
+static void ncdc_input_enter(ncdc_input_t p);
+
+static void ncdc_input_free(ncdc_input_t p)
+{
+    g_array_unref(p->buffer);
+
+    free(p);
+}
+
+ncdc_input_t ncdc_input_new(void)
+{
+    ncdc_input_t p = calloc(1, sizeof(struct ncdc_input_));
+    return_if_true(p == NULL, NULL);
+
+    p->ref.cleanup = (dc_cleanup_t)ncdc_input_free;
+
+    p->buffer = g_array_new(TRUE, TRUE, sizeof(wchar_t));
+    p->cursor = 0;
+
+    p->keys = emacs;
+
+    return p;
+}
+
+static ncdc_keybinding_t has_binding(ncdc_input_t in, wchar_t key)
+{
+    char const *k = keyname(key);
+    size_t i = 0;
+
+    for (; in->keys[i].name != NULL; i++) {
+        if (strcmp(k, in->keys[i].key) == 0) {
+            return in->keys[i].handler;
+        }
+    }
+
+    return NULL;
+}
+
+void ncdc_input_feed(ncdc_input_t input, wchar_t c)
+{
+    return_if_true(input == NULL,);
+    ncdc_keybinding_t handler = NULL;
+
+    if (c == '\r') {
+        ncdc_input_enter(input);
+    } else if ((handler = has_binding(input, c)) != NULL) {
+        handler(input);
+    } else if (iswprint(c)) {
+        g_array_insert_vals(input->buffer, input->cursor, &c, 1);
+        input->cursor += wcswidth(&c, 1);
+    }
+}
+
+void ncdc_input_set_callback(ncdc_input_t i, ncdc_input_callback_t c, void *a)
+{
+    return_if_true(i == NULL,);
+
+    i->callback = c;
+    i->callback_arg = a;
+}
+
+int ncdc_input_cursor(ncdc_input_t input)
+{
+    return_if_true(input == NULL, 0);
+    return input->cursor;
+}
+
+char const *ncdc_input_buffer(ncdc_input_t input)
+{
+    return_if_true(input == NULL, NULL);
+    return (char const *)input->buffer->data;
+}
+
+void ncdc_input_draw(ncdc_input_t input, WINDOW *win)
+{
+    werase(win);
+    mvwaddwstr(win, 0, 0, (wchar_t const *)input->buffer->data);
+    wmove(win, 0, input->cursor);
+    wrefresh(win);
+}
+
+static void ncdc_input_enter(ncdc_input_t input)
+{
+    if (input->buffer->len == 0) {
+        return;
+    }
+
+    if (input->callback != NULL) {
+        bool ret = false;
+
+        ret = input->callback(input,
+                              (wchar_t const *)input->buffer->data,
+                              input->buffer->len,
+                              input->callback_arg
+            );
+        if (ret) {
+            /* TODO: add to history
+             */
+        }
+    }
+
+    g_array_remove_range(input->buffer, 0, input->buffer->len);
+    input->cursor = 0;
+}
+
+void ncdc_input_delete(ncdc_input_t input)
+{
+    return_if_true(input->cursor == input->buffer->len,);
+    g_array_remove_index(input->buffer, input->cursor);
+}
+
+void ncdc_input_delete_backward(ncdc_input_t input)
+{
+    return_if_true(input->cursor == 0,);
+
+    g_array_remove_index(input->buffer, input->cursor-1);
+    --input->cursor;
+}
+
+void ncdc_input_backward(ncdc_input_t input)
+{
+    return_if_true(input->cursor == 0,);
+
+    wchar_t c = g_array_index(input->buffer, wchar_t, input->cursor-1);
+    int len = wcswidth(&c, 1);
+    input->cursor -= len;
+}
+
+void ncdc_input_forward(ncdc_input_t input)
+{
+    return_if_true(input->cursor >= input->buffer->len,);
+
+    wchar_t c = g_array_index(input->buffer, wchar_t, input->cursor);
+    int len = wcswidth(&c, 1);
+    input->cursor += len;
+}

ncdc/src/mainwindow.c

@@ -1,4 +1,5 @@
 #include <ncdc/mainwindow.h>
+#include <ncdc/input.h>
 #include <ncdc/ncdc.h>
 
 typedef enum {
@@ -28,141 +29,105 @@ struct ncdc_mainwindow_
     int input_h;
     int input_y;
     int input_x;
+    int input_curs_x;
 
-    char *cmd;
-    int cin;
-    bool cin_ready;
+    WINDOW *sep1;
+    WINDOW *sep2;
+
+    ncdc_input_t in;
 
     int focus;
 };
 
-static ncdc_mainwindow_t mainwin = NULL;
+static void ncdc_mainwindow_resize(ncdc_mainwindow_t n);
+static void ncdc_mainwindow_update_focus(ncdc_mainwindow_t n);
 
-static void mainwin_resize(void);
-static void mainwin_update_focus(void);
-static void mainwin_command(char *s);
-
-static int readline_input_avail(void)
+static void ncdc_mainwindow_free(ncdc_mainwindow_t n)
 {
-    return mainwin->cin_ready;
+    return_if_true(n == NULL,);
+
+    delwin(n->guilds);
+    delwin(n->chat);
+    delwin(n->input);
+
+    delwin(n->sep1);
+    delwin(n->sep2);
+
+    dc_unref(n->in);
+
+    free(n);
 }
 
-static int readline_getc(FILE *dummy)
+ncdc_mainwindow_t ncdc_mainwindow_new(void)
 {
-    mainwin->cin_ready = false;
-    return mainwin->cin;
+    ncdc_mainwindow_t ptr = calloc(1, sizeof(struct ncdc_mainwindow_));
+    return_if_true(ptr == NULL, NULL);
+
+    ptr->ref.cleanup = (dc_cleanup_t)ncdc_mainwindow_free;
+
+    ptr->in = ncdc_input_new();
+
+    ptr->guilds = newwin(5, 5, 1, 1);
+    ptr->chat = newwin(5, 5, 4, 4);
+
+    ptr->input = newwin(5, 5, 8, 8);
+    keypad(ptr->input, TRUE);
+
+    ptr->sep1 = newwin(5, 5, 10, 10);
+    ptr->sep2 = newwin(5, 5, 12, 12);
+
+    ncdc_mainwindow_resize(ptr);
+
+    ptr->focus = FOCUS_INPUT;
+    ncdc_mainwindow_update_focus(ptr);
+
+    return ptr;
 }
 
-static int measure(char const *string)
+static void ncdc_mainwindow_resize(ncdc_mainwindow_t n)
 {
-    size_t needed = mbstowcs(NULL, string, 0) + 1;
-    wchar_t *wcstring = calloc(needed, sizeof(wchar_t));
-    size_t ret = 0;
+    n->guilds_h = LINES - 2;
+    n->guilds_w = (COLS / 5);
+    n->guilds_y = 0;
+    n->guilds_x = 0;
 
-    return_if_true(wcstring == NULL, -1);
+    wresize(n->guilds, n->guilds_h, n->guilds_w);
+    mvwin(n->guilds, n->guilds_y, n->guilds_x);
+    wnoutrefresh(n->guilds);
 
-    ret = mbstowcs(wcstring, string, needed);
-    if (ret == (size_t)-1) {
-        free(wcstring);
-        return -1;
-    }
+    n->input_h = 1;
+    n->input_w = COLS;
+    n->input_y = LINES - n->input_h;
+    n->input_x = 0;
 
-    int width = wcswidth(wcstring, needed);
-    free(wcstring);
+    wresize(n->input, n->input_h, n->input_w);
+    mvwin(n->input, n->input_y, n->input_x);
+    wnoutrefresh(n->input);
 
-    return width;
+    wresize(n->sep1, 1, COLS);
+    mvwin(n->sep1, LINES - 2, 0);
+    wbkgd(n->sep1, COLOR_PAIR(1));
+    wnoutrefresh(n->sep1);
+
+    n->chat_h = LINES - n->input_h - 1;
+    n->chat_w = COLS - n->guilds_w - 1;
+    n->chat_y = 0;
+    n->chat_x = n->guilds_w + 1;
+
+    wresize(n->chat, n->chat_h, n->chat_w);
+    mvwin(n->chat, n->chat_y, n->chat_x);
+    wnoutrefresh(n->chat);
+
+    wresize(n->sep2, LINES - 2, 1);
+    mvwin(n->sep2, 0, n->guilds_w + 1);
+    wnoutrefresh(n->sep2);
+
+    ncdc_mainwindow_update_focus(n);
 }
 
-static void readline_redisplay(void)
+static void ncdc_mainwindow_update_focus(ncdc_mainwindow_t n)
 {
-    int len = 0;
-    char *line = NULL;
-    int diff = 0;
-
-    asprintf(&line, "%s%s",
-             (rl_display_prompt != NULL ? rl_display_prompt : ""),
-             (rl_line_buffer != NULL ? rl_line_buffer : "")
-        );
-    len = measure(line);
-
-    diff = len - mainwin->input_w + 3;
-    if (diff > 0) {
-        memmove(line, line + diff, len - diff);
-        line[len-diff] = '\0';
-    }
-
-    werase(mainwin->input);
-    mvwprintw(mainwin->input, 1, 1, "%s", line);
-    free(line);
-
-    wrefresh(mainwin->input);
-}
-
-bool ncdc_mainwindow_init(void)
-{
-    mainwin = calloc(1, sizeof(struct ncdc_mainwindow_));
-    return_if_true(mainwin == NULL, false);
-
-    mainwin->guilds = newwin(5, 5, 1, 1);
-    mainwin->chat = newwin(5, 5, 4, 4);
-    mainwin->input = newwin(5, 5, 8, 8);
-    mainwin_resize();
-
-    mainwin->focus = FOCUS_INPUT;
-    mainwin_update_focus();
-
-    rl_getc_function = readline_getc;
-    rl_input_available_hook = readline_input_avail;
-    rl_redisplay_function = readline_redisplay;
-    rl_callback_handler_install("", mainwin_command);
-
-    rl_catch_signals = 0;
-    rl_catch_sigwinch = 0;
-    rl_deprep_term_function = NULL;
-    rl_prep_term_function = NULL;
-
-    return true;
-}
-
-static void mainwin_resize(void)
-{
-    mainwin->guilds_h = LINES;
-    mainwin->guilds_w = (COLS / 5);
-    mainwin->guilds_y = 0;
-    mainwin->guilds_x = 0;
-
-    wresize(mainwin->guilds, mainwin->guilds_h, mainwin->guilds_w);
-    mvwin(mainwin->guilds, mainwin->guilds_y, mainwin->guilds_x);
-    wnoutrefresh(mainwin->guilds);
-
-    mainwin->input_h = 3;
-    mainwin->input_w = COLS - mainwin->guilds_w;
-    mainwin->input_y = LINES - mainwin->input_h;
-    mainwin->input_x = mainwin->guilds_w;
-
-    wresize(mainwin->input, mainwin->input_h, mainwin->input_w);
-    mvwin(mainwin->input, mainwin->input_y, mainwin->input_x);
-    wnoutrefresh(mainwin->input);
-
-    mainwin->chat_h = LINES - mainwin->input_h;
-    mainwin->chat_w = COLS - mainwin->guilds_w;
-    mainwin->chat_y = 0;
-    mainwin->chat_x = mainwin->guilds_w;
-
-    wresize(mainwin->chat, mainwin->chat_h, mainwin->chat_w);
-    mvwin(mainwin->chat, mainwin->chat_y, mainwin->chat_x);
-    wnoutrefresh(mainwin->chat);
-}
-
-static void mainwin_command(char *s)
-{
-    free(mainwin->cmd);
-    mainwin->cmd = s;
-}
-
-static void mainwin_update_focus(void)
-{
-    switch (mainwin->focus) {
+    switch (n->focus) {
     case FOCUS_GUILDS:
     {
     } break;
@@ -173,41 +138,48 @@ static void mainwin_update_focus(void)
 
     case FOCUS_INPUT:
     {
-        int x = 1, y = 1;
-        wmove(mainwin->input, y, x);
+        wmove(n->input, 0, ncdc_input_cursor(n->in));
+        wrefresh(n->input);
     } break;
 
     }
 }
 
-void ncdc_mainwindow_feed(int ch)
+void ncdc_mainwindow_input_ready(ncdc_mainwindow_t n)
 {
-    switch (ch) {
-    case KEY_RESIZE: mainwin_resize(); break;
-    }
-
-    switch (mainwin->focus) {
+    switch (n->focus) {
     case FOCUS_INPUT:
     {
-        mainwin->cin = ch;
-        mainwin->cin_ready = true;
-        rl_callback_read_char();
+        wint_t i = 0;
+
+        if (wget_wch(n->input, &i) == ERR) {
+            return;
+        }
+
+        if (i == KEY_RESIZE) {
+            ncdc_mainwindow_resize(n);
+        } else {
+            ncdc_input_feed(n->in, (wchar_t)i);
+        }
     } break;
 
     }
 }
 
-void ncdc_mainwindow_refresh(void)
+void ncdc_mainwindow_refresh(ncdc_mainwindow_t n)
 {
-    /* move windows
-     */
-    box(mainwin->guilds, 0, 0);
-    box(mainwin->chat, 0, 0);
-    box(mainwin->input, 0, 0);
+    wnoutrefresh(n->guilds);
+    wnoutrefresh(n->chat);
 
-    wrefresh(mainwin->guilds);
-    wrefresh(mainwin->chat);
-    wrefresh(mainwin->input);
+    ncdc_input_draw(n->in, n->input);
+    wnoutrefresh(n->input);
+
+    wbkgd(n->sep1, COLOR_PAIR(1));
+    wnoutrefresh(n->sep1);
+    wbkgd(n->sep2, COLOR_PAIR(1));
+    wnoutrefresh(n->sep2);
+
+    ncdc_mainwindow_update_focus(n);
 
     doupdate();
 }

ncdc/src/ncdc.c

@@ -48,11 +48,8 @@ static void cleanup(void)
 
 static void stdin_handler(int sock, short what, void *data)
 {
-    int ch = 0;
-
     if ((what & EV_READ) == EV_READ) {
-        ch = getch();
-        ncdc_mainwindow_feed(ch);
+        ncdc_mainwindow_input_ready(mainwin);
     }
 }
 
@@ -60,6 +57,8 @@ static bool init_everything(void)
 {
     evthread_use_pthreads();
 
+    setlocale(LC_CTYPE, "");
+
     loop = dc_loop_new();
     return_if_true(loop == NULL, false);
 
@@ -135,29 +134,34 @@ int main(int ac, char **av)
     done = false;
 
     initscr();
-    cbreak();
     noecho();
     nonl();
+    keypad(stdscr, TRUE);
     intrflush(NULL, FALSE);
 
     if (has_colors()) {
         start_color();
         use_default_colors();
+
+        init_pair(1, COLOR_WHITE, COLOR_BLUE);
     }
 
-    if (!ncdc_mainwindow_init()) {
+    mainwin = ncdc_mainwindow_new();
+    if (mainwin == NULL) {
         fprintf(stderr, "failed to init ncurses\n");
         return 3;
     }
 
     while (!done) {
-        ncdc_mainwindow_refresh();
+        ncdc_mainwindow_refresh(mainwin);
+        doupdate();
 
         if (!dc_loop_once(loop)) {
             break;
         }
     }
 
+    dc_unref(mainwin);
     endwin();
 
     return 0;

ncdc/src/util.c

@@ -0,0 +1,39 @@
+#include <ncdc/ncdc.h>
+
+char *read_char(FILE *stream)
+{
+    uint8_t str[7] = {0};
+    int len = 0, i = 0;
+
+    /* check if we need more
+     */
+    str[0] = (uint8_t)fgetc(stream);
+    len = g_utf8_skip[str[0]];
+
+    for (i = 1; i < len; i++) {
+        str[i] = (uint8_t)fgetc(stream);
+    }
+    str[len] = '\0';
+
+    return strdup((char const *)str);
+}
+
+int strwidth(char const *string)
+{
+    size_t needed = mbstowcs(NULL, string, 0) + 1;
+    wchar_t *wcstring = calloc(needed, sizeof(wchar_t));
+    size_t ret = 0;
+
+    return_if_true(wcstring == NULL, -1);
+
+    ret = mbstowcs(wcstring, string, needed);
+    if (ret == (size_t)-1) {
+        free(wcstring);
+        return -1;
+    }
+
+    int width = wcswidth(wcstring, needed);
+    free(wcstring);
+
+    return width;
+}