wash
ad8b284869
the line editor supports custom keybinds and data storage, allowing for
a wide range of functionality to be implemented via plugins.
included plugins include:
* core: basic input and cursor movement.
* history: input history storage and retrieval (unfinished)
* highlight: support for colour-highlighting the line buffer (unfinished)
* syntax: parses the line buffer and uses `highlight` to apply syntax highlighting (unfinished).
* shell-integration:
- allows a `prompt` function to be defined, which will be called to get the text to
be used for the prompt
- exposes key properties of the line editor to the shell environment, allowing line editor
functionality to be extended via shell scripts.
230 lines
6.1 KiB
C
230 lines
6.1 KiB
C
#include <bshell/line-editor/core.h>
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#include <bshell/line-editor/line-editor.h>
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#include <bshell/line-editor/plugin.h>
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#include <fx/collections/hashtable.h>
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#include <fx/term/tty.h>
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struct bshell_line_ed_core_p {
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bshell_line_ed_keybind *c_key_cursor_left;
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bshell_line_ed_keybind *c_key_cursor_right;
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bshell_line_ed_keybind *c_key_return;
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bshell_line_ed_keybind *c_key_eof;
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bshell_line_ed_keybind *c_key_generic;
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bshell_line_ed_keybind *c_key_backspace;
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fx_hashtable *c_data;
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};
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static void init(fx_object *obj, void *priv)
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{
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struct bshell_line_ed_core_p *core = priv;
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core->c_data = fx_hashtable_create();
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}
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static void fini(fx_object *obj, void *priv)
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{
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struct bshell_line_ed_core_p *core = priv;
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fx_hashtable_unref(core->c_data);
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}
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static struct bshell_line_ed_keybind_result delete_backward(
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bshell_line_ed *ed,
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fx_keycode key)
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{
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return BSHELL_LINE_EDITOR_KEYBIND_RESULT(
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BSHELL_SUCCESS,
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BSHELL_LINE_EDITOR_KEYBIND_CONTINUE);
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}
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static struct bshell_line_ed_keybind_result cursor_left(
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bshell_line_ed *ed,
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fx_keycode key)
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{
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bshell_line_ed_move_cursor(ed, -1);
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return BSHELL_LINE_EDITOR_KEYBIND_RESULT(
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BSHELL_SUCCESS,
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BSHELL_LINE_EDITOR_KEYBIND_CONTINUE);
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}
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static struct bshell_line_ed_keybind_result cursor_right(
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bshell_line_ed *ed,
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fx_keycode key)
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{
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bshell_line_ed_move_cursor(ed, 1);
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return BSHELL_LINE_EDITOR_KEYBIND_RESULT(
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BSHELL_SUCCESS,
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BSHELL_LINE_EDITOR_KEYBIND_CONTINUE);
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}
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static struct bshell_line_ed_keybind_result eof_key(
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bshell_line_ed *ed,
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fx_keycode key)
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{
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bshell_line_ed_set_eof(ed);
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return BSHELL_LINE_EDITOR_KEYBIND_RESULT(
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BSHELL_SUCCESS,
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BSHELL_LINE_EDITOR_KEYBIND_CONTINUE);
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}
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static struct bshell_line_ed_keybind_result return_key(
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bshell_line_ed *ed,
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fx_keycode key)
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{
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bshell_line_ed_set_done(ed);
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fx_string *buf = bshell_line_ed_get_buffer(ed);
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fx_string_append_c(buf, '\n');
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return BSHELL_LINE_EDITOR_KEYBIND_RESULT(
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BSHELL_SUCCESS,
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BSHELL_LINE_EDITOR_KEYBIND_CONTINUE);
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}
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static struct bshell_line_ed_keybind_result backspace(
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bshell_line_ed *ed,
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fx_keycode key)
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{
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fx_string *buf = bshell_line_ed_get_buffer(ed);
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unsigned long cursor = bshell_line_ed_get_cursor(ed);
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if (cursor > 0) {
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fx_string_remove(buf, cursor - 1, 1);
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bshell_line_ed_move_cursor(ed, -1);
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bshell_line_ed_buffer_changed(ed);
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}
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return BSHELL_LINE_EDITOR_KEYBIND_RESULT(
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BSHELL_SUCCESS,
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BSHELL_LINE_EDITOR_KEYBIND_CONTINUE);
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}
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static struct bshell_line_ed_keybind_result generic_key(
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bshell_line_ed *ed,
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fx_keycode key)
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{
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fx_wchar c = key;
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bool valid = fx_wchar_utf8_is_valid_scalar(c) && fx_wchar_is_graph(c);
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if (valid) {
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fx_string *buf = bshell_line_ed_get_buffer(ed);
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unsigned long cursor = bshell_line_ed_get_cursor(ed);
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char cstr[5] = {0};
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fx_string_insert_wc(buf, c, cursor);
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bshell_line_ed_move_cursor(ed, 1);
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bshell_line_ed_buffer_changed(ed);
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}
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return BSHELL_LINE_EDITOR_KEYBIND_RESULT(
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BSHELL_SUCCESS,
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BSHELL_LINE_EDITOR_KEYBIND_CONTINUE);
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}
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static enum bshell_status load(
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bshell_line_ed_plugin *plugin,
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bshell_line_ed *ed)
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{
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struct bshell_line_ed_core_p *core
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= fx_object_get_private(plugin, BSHELL_TYPE_LINE_EDITOR_CORE);
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core->c_key_eof = bshell_line_ed_bind_key(ed, "^d", eof_key, 100);
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core->c_key_cursor_left
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= bshell_line_ed_bind_key(ed, "left", cursor_left, 100);
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core->c_key_cursor_right
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= bshell_line_ed_bind_key(ed, "right", cursor_right, 100);
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core->c_key_cursor_right
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= bshell_line_ed_bind_key(ed, "return", return_key, 100);
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core->c_key_generic
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= bshell_line_ed_bind_key(ed, "*", generic_key, 100);
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core->c_key_backspace
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= bshell_line_ed_bind_key(ed, "backspace", backspace, 100);
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return BSHELL_SUCCESS;
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}
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static enum bshell_status render_prompt(
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bshell_line_ed_plugin *plugin,
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bshell_line_ed *ed)
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{
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fx_string *prompt = bshell_line_ed_get_prompt(ed);
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fx_tty *tty = bshell_line_ed_get_tty(ed);
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const char *s = fx_string_get_cstr(prompt);
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fx_tty_puts(tty, 0, s);
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return BSHELL_SUCCESS;
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}
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static enum bshell_status render_buffer(
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bshell_line_ed_plugin *plugin,
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bshell_line_ed *ed)
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{
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fx_string *buf = bshell_line_ed_get_buffer(ed);
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fx_tty *tty = bshell_line_ed_get_tty(ed);
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const char *s = fx_string_get_cstr(buf);
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for (unsigned long i = 0; *s; i++) {
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fx_wchar c = fx_wchar_utf8_codepoint_decode(s);
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unsigned int stride = fx_wchar_utf8_codepoint_size(c);
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if (stride == 0) {
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break;
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}
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char cs[5] = {0};
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fx_wchar_utf8_codepoint_encode(c, cs);
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fx_tty_puts(tty, 0, cs);
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s += stride;
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}
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return BSHELL_SUCCESS;
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}
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static enum bshell_status get_data(
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bshell_line_ed_plugin *plugin,
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bshell_line_ed *ed,
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const char *key,
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fx_value *out)
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{
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struct bshell_line_ed_core_p *core
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= fx_object_get_private(plugin, BSHELL_TYPE_LINE_EDITOR_CORE);
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const fx_value *v = fx_hashtable_get(core->c_data, &FX_CSTR(key));
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if (v) {
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fx_value_copy(out, v);
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} else {
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*out = FX_VALUE_EMPTY;
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}
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return BSHELL_SUCCESS;
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}
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static enum bshell_status put_data(
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bshell_line_ed_plugin *plugin,
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bshell_line_ed *ed,
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const char *key,
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const fx_value *value)
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{
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struct bshell_line_ed_core_p *core
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= fx_object_get_private(plugin, BSHELL_TYPE_LINE_EDITOR_CORE);
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fx_hashtable_put(core->c_data, &FX_CSTR(key), (fx_value *)value);
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return BSHELL_SUCCESS;
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}
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FX_TYPE_CLASS_BEGIN(bshell_line_ed_core)
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FX_TYPE_VTABLE_INTERFACE_BEGIN(fx_object, FX_TYPE_OBJECT)
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FX_INTERFACE_ENTRY(to_string) = NULL;
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FX_TYPE_VTABLE_INTERFACE_END(fx_object, FX_TYPE_OBJECT)
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FX_TYPE_VTABLE_INTERFACE_BEGIN(
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bshell_line_ed_plugin,
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BSHELL_TYPE_LINE_EDITOR_PLUGIN)
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FX_INTERFACE_ENTRY(p_load) = load;
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FX_INTERFACE_ENTRY(p_render_prompt) = render_prompt;
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FX_INTERFACE_ENTRY(p_render_buffer) = render_buffer;
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FX_INTERFACE_ENTRY(p_get_data) = get_data;
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FX_INTERFACE_ENTRY(p_put_data) = put_data;
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FX_TYPE_VTABLE_INTERFACE_END(bshell_command, BSHELL_TYPE_COMMAND)
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FX_TYPE_CLASS_END(bshell_line_ed_core)
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FX_TYPE_DEFINITION_BEGIN(bshell_line_ed_core)
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FX_TYPE_ID(0xf5174a63, 0x8fe4, 0x4720, 0xa861, 0x4ebb0d170dd3);
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FX_TYPE_NAME("bshell.runtime.line_editor.plugins.core");
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FX_TYPE_EXTENDS(BSHELL_TYPE_LINE_EDITOR_PLUGIN);
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FX_TYPE_CLASS(bshell_line_ed_core_class);
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FX_TYPE_INSTANCE_INIT(init);
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FX_TYPE_INSTANCE_FINI(fini);
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FX_TYPE_INSTANCE_PRIVATE(struct bshell_line_ed_core_p);
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FX_TYPE_DEFINITION_END(bshell_line_ed_core)
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