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.
99 lines
2.7 KiB
C
99 lines
2.7 KiB
C
#include "line-editor.h"
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void line_ed_hide(struct bshell_line_ed_p *ed)
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{
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if (!ed->ed_render.r_vlines) {
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return;
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}
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#if 0
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fprintf(stderr, "--- hide ---\n");
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fprintf(stderr,
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"vlines=%lu, cursor=%lu->(%ld,%ld)\n",
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ed->ed_render.r_vlines,
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ed->ed_cursor,
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ed->ed_render.ed_points.c_cursor_x,
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ed->ed_render.ed_points.c_cursor_y);
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#endif
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if (ed->ed_render.ed_points.c_cursor_y > 0) {
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fx_tty_move_cursor_y(
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ed->ed_tty,
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FX_TTY_POS_CURSOR,
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-ed->ed_render.ed_points.c_cursor_y);
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}
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fx_tty_move_cursor_x(ed->ed_tty, FX_TTY_POS_START, 0);
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fx_tty_clear(
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ed->ed_tty,
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FX_TTY_CLEAR_SCREEN | FX_TTY_CLEAR_FROM_CURSOR);
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memset(&ed->ed_render, 0x0, sizeof ed->ed_render);
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}
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static void render_prompt(struct bshell_line_ed_p *ed)
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{
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if (ed->ed_render_prompt) {
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bshell_line_ed_plugin_class *renderer = fx_object_get_interface(
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ed->ed_render_prompt,
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BSHELL_TYPE_LINE_EDITOR_PLUGIN);
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renderer->p_render_prompt(ed->ed_render_prompt, ed->ed_self);
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}
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}
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static void render_buffer(struct bshell_line_ed_p *ed)
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{
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if (ed->ed_render_buffer) {
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bshell_line_ed_plugin_class *renderer = fx_object_get_interface(
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ed->ed_render_buffer,
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BSHELL_TYPE_LINE_EDITOR_PLUGIN);
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renderer->p_render_buffer(ed->ed_render_buffer, ed->ed_self);
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}
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}
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void line_ed_show(struct bshell_line_ed_p *ed)
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{
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render_prompt(ed);
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render_buffer(ed);
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line_ed_get_points(ed, &ed->ed_render.ed_points);
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bool cursor_limit_newline
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= ed->ed_render.ed_points.c_cursor_limit_x == 0
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&& ed->ed_render.ed_points.c_cursor_limit_y > 0;
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if (cursor_limit_newline) {
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fx_tty_putc(ed->ed_tty, 0, '\r');
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fx_tty_putc(ed->ed_tty, 0, '\n');
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}
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long shift_x = 0, shift_y = 0;
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shift_x = (long)ed->ed_render.ed_points.c_cursor_x
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- (long)ed->ed_render.ed_points.c_cursor_limit_x;
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shift_y = (long)ed->ed_render.ed_points.c_cursor_y
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- (long)ed->ed_render.ed_points.c_cursor_limit_y;
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fx_tty_move_cursor_x(ed->ed_tty, FX_TTY_POS_CURSOR, shift_x);
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fx_tty_move_cursor_y(ed->ed_tty, FX_TTY_POS_CURSOR, shift_y);
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#if 0
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fprintf(stderr, "--- show ---\n");
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fprintf(stderr,
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"cursor=%lu->(%lu,%lu)\n",
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ed->ed_cursor,
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ed->ed_render.ed_points.c_cursor_x,
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ed->ed_render.ed_points.c_cursor_y);
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fprintf(stderr,
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"cursor_limit=(%lu,%lu)\n",
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ed->ed_render.ed_points.c_cursor_limit_x,
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ed->ed_render.ed_points.c_cursor_limit_y);
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fprintf(stderr,
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"render_limit=(%lu,%lu)\n",
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ed->ed_render.ed_points.c_render_limit_x,
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ed->ed_render.ed_points.c_render_limit_y);
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#endif
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ed->ed_render.r_vlines = ed->ed_render.ed_points.c_render_limit_y + 1;
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}
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int line_ed_get_char_width(fx_wchar c)
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{
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/* TODO support double-width and zero-width characters */
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return fx_wchar_is_graph(c) ? 1 : 0;
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}
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