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neovim/src/nvim/api/ui.c
Justin M. Keyes 4b0e2605ea feat(ui): UI :detach command 
Problem:
Cannot detach the current UI.

Solution:
- Introduce `:detach`.
- Introduce `Channel.detach`.

Co-authored-by: bfredl <bjorn.linse@gmail.com>
2025-02-10 18:56:11 +01:00

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#include <assert.h>
#include <inttypes.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "klib/kvec.h"
#include "nvim/api/private/defs.h"
#include "nvim/api/private/helpers.h"
#include "nvim/api/private/validate.h"
#include "nvim/api/ui.h"
#include "nvim/assert_defs.h"
#include "nvim/autocmd.h"
#include "nvim/autocmd_defs.h"
#include "nvim/channel.h"
#include "nvim/channel_defs.h"
#include "nvim/eval.h"
#include "nvim/event/defs.h"
#include "nvim/event/loop.h"
#include "nvim/event/multiqueue.h"
#include "nvim/event/wstream.h"
#include "nvim/globals.h"
#include "nvim/grid.h"
#include "nvim/highlight.h"
#include "nvim/macros_defs.h"
#include "nvim/main.h"
#include "nvim/map_defs.h"
#include "nvim/mbyte.h"
#include "nvim/memory.h"
#include "nvim/memory_defs.h"
#include "nvim/msgpack_rpc/channel.h"
#include "nvim/msgpack_rpc/channel_defs.h"
#include "nvim/msgpack_rpc/packer.h"
#include "nvim/msgpack_rpc/packer_defs.h"
#include "nvim/option.h"
#include "nvim/types_defs.h"
#include "nvim/ui.h"
#define BUF_POS(ui) ((size_t)((ui)->packer.ptr - (ui)->packer.startptr))
#ifdef INCLUDE_GENERATED_DECLARATIONS
# include "api/ui.c.generated.h"
# include "ui_events_remote.generated.h" // IWYU pragma: export
#endif
static PMap(uint64_t) connected_uis = MAP_INIT;
static char *mpack_array_dyn16(char **buf)
{
mpack_w(buf, 0xdc);
char *pos = *buf;
mpack_w2(buf, 0xFFEF);
return pos;
}
static void mpack_str_small(char **buf, const char *str, size_t len)
{
assert(len < 0x20);
mpack_w(buf, 0xa0 | len);
memcpy(*buf, str, len);
*buf += len;
}
static void remote_ui_destroy(RemoteUI *ui)
FUNC_ATTR_NONNULL_ALL
{
xfree(ui->packer.startptr);
XFREE_CLEAR(ui->term_name);
xfree(ui);
}
void remote_ui_disconnect(uint64_t channel_id)
{
RemoteUI *ui = pmap_get(uint64_t)(&connected_uis, channel_id);
if (!ui) {
return;
}
pmap_del(uint64_t)(&connected_uis, channel_id, NULL);
ui_detach_impl(ui, channel_id);
remote_ui_destroy(ui);
}
#ifdef EXITFREE
void remote_ui_free_all_mem(void)
{
RemoteUI *ui;
map_foreach_value(&connected_uis, ui, {
remote_ui_destroy(ui);
});
map_destroy(uint64_t, &connected_uis);
}
#endif
/// Wait until UI has connected.
///
/// @param only_stdio UI is expected to connect on stdio.
void remote_ui_wait_for_attach(bool only_stdio)
{
if (only_stdio) {
Channel *channel = find_channel(CHAN_STDIO);
if (!channel) {
// `only_stdio` implies --embed mode, thus stdio channel can be assumed.
abort();
}
LOOP_PROCESS_EVENTS_UNTIL(&main_loop, channel->events, -1,
map_has(uint64_t, &connected_uis, CHAN_STDIO));
} else {
LOOP_PROCESS_EVENTS_UNTIL(&main_loop, main_loop.events, -1,
ui_active());
}
}
/// Activates UI events on the channel.
///
/// Entry point of all UI clients. Allows |--embed| to continue startup.
/// Implies that the client is ready to show the UI. Adds the client to the
/// list of UIs. |nvim_list_uis()|
///
/// @note If multiple UI clients are attached, the global screen dimensions
/// degrade to the smallest client. E.g. if client A requests 80x40 but
/// client B requests 200x100, the global screen has size 80x40.
///
/// @param channel_id
/// @param width Requested screen columns
/// @param height Requested screen rows
/// @param options |ui-option| map
/// @param[out] err Error details, if any
void nvim_ui_attach(uint64_t channel_id, Integer width, Integer height, Dict options, Error *err)
FUNC_API_SINCE(1) FUNC_API_REMOTE_ONLY
{
if (map_has(uint64_t, &connected_uis, channel_id)) {
api_set_error(err, kErrorTypeException,
"UI already attached to channel: %" PRId64, channel_id);
return;
}
if (width <= 0 || height <= 0) {
api_set_error(err, kErrorTypeValidation,
"Expected width > 0 and height > 0");
return;
}
RemoteUI *ui = xcalloc(1, sizeof(RemoteUI));
ui->width = (int)width;
ui->height = (int)height;
ui->pum_row = -1.0;
ui->pum_col = -1.0;
ui->rgb = true;
CLEAR_FIELD(ui->ui_ext);
for (size_t i = 0; i < options.size; i++) {
ui_set_option(ui, true, options.items[i].key, options.items[i].value, err);
if (ERROR_SET(err)) {
xfree(ui);
return;
}
}
if (ui->ui_ext[kUIHlState] || ui->ui_ext[kUIMultigrid]) {
ui->ui_ext[kUILinegrid] = true;
}
if (ui->ui_ext[kUIMessages]) {
// This uses attribute indices, so ext_linegrid is needed.
ui->ui_ext[kUILinegrid] = true;
// Cmdline uses the messages area, so it should be externalized too.
ui->ui_ext[kUICmdline] = true;
}
ui->channel_id = channel_id;
ui->cur_event = NULL;
ui->hl_id = 0;
ui->client_col = -1;
ui->nevents_pos = NULL;
ui->nevents = 0;
ui->flushed_events = false;
ui->ncalls_pos = NULL;
ui->ncalls = 0;
ui->ncells_pending = 0;
ui->packer = (PackerBuffer) {
.startptr = NULL,
.ptr = NULL,
.endptr = NULL,
.packer_flush = ui_flush_callback,
.anydata = ui,
};
ui->wildmenu_active = false;
pmap_put(uint64_t)(&connected_uis, channel_id, ui);
current_ui = channel_id;
ui_attach_impl(ui, channel_id);
may_trigger_vim_suspend_resume(false);
}
/// @deprecated
void ui_attach(uint64_t channel_id, Integer width, Integer height, Boolean enable_rgb, Error *err)
FUNC_API_DEPRECATED_SINCE(1)
{
MAXSIZE_TEMP_DICT(opts, 1);
PUT_C(opts, "rgb", BOOLEAN_OBJ(enable_rgb));
nvim_ui_attach(channel_id, width, height, opts, err);
}
/// Tells the nvim server if focus was gained or lost by the GUI
void nvim_ui_set_focus(uint64_t channel_id, Boolean gained, Error *error)
FUNC_API_SINCE(11) FUNC_API_REMOTE_ONLY
{
if (!map_has(uint64_t, &connected_uis, channel_id)) {
api_set_error(error, kErrorTypeException,
"UI not attached to channel: %" PRId64, channel_id);
return;
}
if (gained) {
current_ui = channel_id;
may_trigger_vim_suspend_resume(false);
}
do_autocmd_focusgained((bool)gained);
}
/// Deactivates UI events on the channel.
///
/// Removes the client from the list of UIs. |nvim_list_uis()|
///
/// @param channel_id
/// @param[out] err Error details, if any
void nvim_ui_detach(uint64_t channel_id, Error *err)
FUNC_API_SINCE(1) FUNC_API_REMOTE_ONLY
{
if (!map_has(uint64_t, &connected_uis, channel_id)) {
api_set_error(err, kErrorTypeException,
"UI not attached to channel: %" PRId64, channel_id);
return;
}
remote_ui_disconnect(channel_id);
}
// TODO(bfredl): use me to detach a specific ui from the server
void remote_ui_stop(RemoteUI *ui)
{
}
void nvim_ui_try_resize(uint64_t channel_id, Integer width, Integer height, Error *err)
FUNC_API_SINCE(1) FUNC_API_REMOTE_ONLY
{
if (!map_has(uint64_t, &connected_uis, channel_id)) {
api_set_error(err, kErrorTypeException,
"UI not attached to channel: %" PRId64, channel_id);
return;
}
if (width <= 0 || height <= 0) {
api_set_error(err, kErrorTypeValidation,
"Expected width > 0 and height > 0");
return;
}
RemoteUI *ui = pmap_get(uint64_t)(&connected_uis, channel_id);
ui->width = (int)width;
ui->height = (int)height;
ui_refresh();
}
void nvim_ui_set_option(uint64_t channel_id, String name, Object value, Error *error)
FUNC_API_SINCE(1) FUNC_API_REMOTE_ONLY
{
if (!map_has(uint64_t, &connected_uis, channel_id)) {
api_set_error(error, kErrorTypeException,
"UI not attached to channel: %" PRId64, channel_id);
return;
}
RemoteUI *ui = pmap_get(uint64_t)(&connected_uis, channel_id);
ui_set_option(ui, false, name, value, error);
}
static void ui_set_option(RemoteUI *ui, bool init, String name, Object value, Error *err)
{
if (strequal(name.data, "override")) {
VALIDATE_T("override", kObjectTypeBoolean, value.type, {
return;
});
ui->override = value.data.boolean;
return;
}
if (strequal(name.data, "rgb")) {
VALIDATE_T("rgb", kObjectTypeBoolean, value.type, {
return;
});
ui->rgb = value.data.boolean;
// A little drastic, but only takes effect for legacy uis. For linegrid UI
// only changes metadata for nvim_list_uis(), no refresh needed.
if (!init && !ui->ui_ext[kUILinegrid]) {
ui_refresh();
}
return;
}
if (strequal(name.data, "term_name")) {
VALIDATE_T("term_name", kObjectTypeString, value.type, {
return;
});
set_tty_option("term", string_to_cstr(value.data.string));
ui->term_name = string_to_cstr(value.data.string);
return;
}
if (strequal(name.data, "term_colors")) {
VALIDATE_T("term_colors", kObjectTypeInteger, value.type, {
return;
});
t_colors = (int)value.data.integer;
ui->term_colors = (int)value.data.integer;
return;
}
if (strequal(name.data, "stdin_fd")) {
VALIDATE_T("stdin_fd", kObjectTypeInteger, value.type, {
return;
});
VALIDATE_INT((value.data.integer >= 0), "stdin_fd", value.data.integer, {
return;
});
VALIDATE((starting == NO_SCREEN), "%s", "stdin_fd can only be used with first attached UI", {
return;
});
stdin_fd = (int)value.data.integer;
return;
}
if (strequal(name.data, "stdin_tty")) {
VALIDATE_T("stdin_tty", kObjectTypeBoolean, value.type, {
return;
});
stdin_isatty = value.data.boolean;
ui->stdin_tty = value.data.boolean;
return;
}
if (strequal(name.data, "stdout_tty")) {
VALIDATE_T("stdout_tty", kObjectTypeBoolean, value.type, {
return;
});
stdout_isatty = value.data.boolean;
ui->stdout_tty = value.data.boolean;
return;
}
// LEGACY: Deprecated option, use `ext_cmdline` instead.
bool is_popupmenu = strequal(name.data, "popupmenu_external");
for (UIExtension i = 0; i < kUIExtCount; i++) {
if (strequal(name.data, ui_ext_names[i])
|| (i == kUIPopupmenu && is_popupmenu)) {
VALIDATE_EXP((value.type == kObjectTypeBoolean), name.data, "Boolean",
api_typename(value.type), {
return;
});
bool boolval = value.data.boolean;
if (!init && i == kUILinegrid && boolval != ui->ui_ext[i]) {
// There shouldn't be a reason for a UI to do this ever
// so explicitly don't support this.
api_set_error(err, kErrorTypeValidation, "ext_linegrid option cannot be changed");
}
ui->ui_ext[i] = boolval;
if (!init) {
ui_set_ext_option(ui, i, boolval);
}
return;
}
}
api_set_error(err, kErrorTypeValidation, "No such UI option: %s", name.data);
}
/// Tell Nvim to resize a grid. Triggers a grid_resize event with the requested
/// grid size or the maximum size if it exceeds size limits.
///
/// On invalid grid handle, fails with error.
///
/// @param channel_id
/// @param grid The handle of the grid to be changed.
/// @param width The new requested width.
/// @param height The new requested height.
/// @param[out] err Error details, if any
void nvim_ui_try_resize_grid(uint64_t channel_id, Integer grid, Integer width, Integer height,
Error *err)
FUNC_API_SINCE(6) FUNC_API_REMOTE_ONLY
{
if (!map_has(uint64_t, &connected_uis, channel_id)) {
api_set_error(err, kErrorTypeException,
"UI not attached to channel: %" PRId64, channel_id);
return;
}
if (grid == DEFAULT_GRID_HANDLE) {
nvim_ui_try_resize(channel_id, width, height, err);
} else {
ui_grid_resize((handle_T)grid, (int)width, (int)height, err);
}
}
/// Tells Nvim the number of elements displaying in the popupmenu, to decide
/// [<PageUp>] and [<PageDown>] movement.
///
/// @param channel_id
/// @param height Popupmenu height, must be greater than zero.
/// @param[out] err Error details, if any
void nvim_ui_pum_set_height(uint64_t channel_id, Integer height, Error *err)
FUNC_API_SINCE(6) FUNC_API_REMOTE_ONLY
{
if (!map_has(uint64_t, &connected_uis, channel_id)) {
api_set_error(err, kErrorTypeException,
"UI not attached to channel: %" PRId64, channel_id);
return;
}
if (height <= 0) {
api_set_error(err, kErrorTypeValidation, "Expected pum height > 0");
return;
}
RemoteUI *ui = pmap_get(uint64_t)(&connected_uis, channel_id);
if (!ui->ui_ext[kUIPopupmenu]) {
api_set_error(err, kErrorTypeValidation,
"It must support the ext_popupmenu option");
return;
}
ui->pum_nlines = (int)height;
}
/// Tells Nvim the geometry of the popupmenu, to align floating windows with an
/// external popup menu.
///
/// Note that this method is not to be confused with |nvim_ui_pum_set_height()|,
/// which sets the number of visible items in the popup menu, while this
/// function sets the bounding box of the popup menu, including visual
/// elements such as borders and sliders. Floats need not use the same font
/// size, nor be anchored to exact grid corners, so one can set floating-point
/// numbers to the popup menu geometry.
///
/// @param channel_id
/// @param width Popupmenu width.
/// @param height Popupmenu height.
/// @param row Popupmenu row.
/// @param col Popupmenu height.
/// @param[out] err Error details, if any.
void nvim_ui_pum_set_bounds(uint64_t channel_id, Float width, Float height, Float row, Float col,
Error *err)
FUNC_API_SINCE(7) FUNC_API_REMOTE_ONLY
{
if (!map_has(uint64_t, &connected_uis, channel_id)) {
api_set_error(err, kErrorTypeException,
"UI not attached to channel: %" PRId64, channel_id);
return;
}
RemoteUI *ui = pmap_get(uint64_t)(&connected_uis, channel_id);
if (!ui->ui_ext[kUIPopupmenu]) {
api_set_error(err, kErrorTypeValidation,
"UI must support the ext_popupmenu option");
return;
}
if (width <= 0) {
api_set_error(err, kErrorTypeValidation, "Expected width > 0");
return;
} else if (height <= 0) {
api_set_error(err, kErrorTypeValidation, "Expected height > 0");
return;
}
ui->pum_row = (double)row;
ui->pum_col = (double)col;
ui->pum_width = (double)width;
ui->pum_height = (double)height;
ui->pum_pos = true;
}
/// Tells Nvim when a terminal event has occurred
///
/// The following terminal events are supported:
///
/// - "termresponse": The terminal sent an OSC or DCS response sequence to
/// Nvim. The payload is the received response. Sets
/// |v:termresponse| and fires |TermResponse|.
///
/// @param channel_id
/// @param event Event name
/// @param value Event payload
/// @param[out] err Error details, if any.
void nvim_ui_term_event(uint64_t channel_id, String event, Object value, Error *err)
FUNC_API_SINCE(12) FUNC_API_REMOTE_ONLY
{
if (strequal("termresponse", event.data)) {
if (value.type != kObjectTypeString) {
api_set_error(err, kErrorTypeValidation, "termresponse must be a string");
return;
}
const String termresponse = value.data.string;
set_vim_var_string(VV_TERMRESPONSE, termresponse.data, (ptrdiff_t)termresponse.size);
apply_autocmds_group(EVENT_TERMRESPONSE, NULL, NULL, false, AUGROUP_ALL, NULL, NULL, &value);
}
}
static void flush_event(RemoteUI *ui)
{
if (ui->cur_event) {
mpack_w2(&ui->ncalls_pos, 1 + ui->ncalls);
ui->cur_event = NULL;
ui->ncalls_pos = NULL;
ui->ncalls = 0;
}
}
static void ui_alloc_buf(RemoteUI *ui)
{
ui->packer.startptr = alloc_block();
ui->packer.ptr = ui->packer.startptr;
ui->packer.endptr = ui->packer.startptr + UI_BUF_SIZE;
}
static void prepare_call(RemoteUI *ui, const char *name)
{
if (ui->packer.startptr
&& (BUF_POS(ui) > UI_BUF_SIZE - EVENT_BUF_SIZE || ui->ncells_pending >= 500)) {
ui_flush_buf(ui);
}
if (ui->packer.startptr == NULL) {
ui_alloc_buf(ui);
}
// To optimize data transfer (especially for "grid_line"), we bundle adjacent
// calls to same method together, so only add a new call entry if the last
// method call is different from "name"
if (!ui->cur_event || !strequal(ui->cur_event, name)) {
char **buf = &ui->packer.ptr;
if (!ui->nevents_pos) {
// [2, "redraw", [...]]
mpack_array(buf, 3);
mpack_uint(buf, 2);
mpack_str_small(buf, S_LEN("redraw"));
ui->nevents_pos = mpack_array_dyn16(buf);
assert(ui->cur_event == NULL);
}
flush_event(ui);
ui->cur_event = name;
ui->ncalls_pos = mpack_array_dyn16(buf);
mpack_str_small(buf, name, strlen(name));
ui->nevents++;
ui->ncalls = 1;
} else {
ui->ncalls++;
}
}
/// Pushes data into RemoteUI, to be consumed later by remote_ui_flush().
static void push_call(RemoteUI *ui, const char *name, Array args)
{
prepare_call(ui, name);
mpack_object_array(args, &ui->packer);
}
static void ui_flush_callback(PackerBuffer *packer)
{
RemoteUI *ui = packer->anydata;
ui_flush_buf(ui);
ui_alloc_buf(ui);
}
void remote_ui_grid_clear(RemoteUI *ui, Integer grid)
{
MAXSIZE_TEMP_ARRAY(args, 1);
if (ui->ui_ext[kUILinegrid]) {
ADD_C(args, INTEGER_OBJ(grid));
}
const char *name = ui->ui_ext[kUILinegrid] ? "grid_clear" : "clear";
push_call(ui, name, args);
}
void remote_ui_grid_resize(RemoteUI *ui, Integer grid, Integer width, Integer height)
{
MAXSIZE_TEMP_ARRAY(args, 3);
if (ui->ui_ext[kUILinegrid]) {
ADD_C(args, INTEGER_OBJ(grid));
} else {
ui->client_col = -1; // force cursor update
}
ADD_C(args, INTEGER_OBJ(width));
ADD_C(args, INTEGER_OBJ(height));
const char *name = ui->ui_ext[kUILinegrid] ? "grid_resize" : "resize";
push_call(ui, name, args);
}
void remote_ui_grid_scroll(RemoteUI *ui, Integer grid, Integer top, Integer bot, Integer left,
Integer right, Integer rows, Integer cols)
{
if (ui->ui_ext[kUILinegrid]) {
MAXSIZE_TEMP_ARRAY(args, 7);
ADD_C(args, INTEGER_OBJ(grid));
ADD_C(args, INTEGER_OBJ(top));
ADD_C(args, INTEGER_OBJ(bot));
ADD_C(args, INTEGER_OBJ(left));
ADD_C(args, INTEGER_OBJ(right));
ADD_C(args, INTEGER_OBJ(rows));
ADD_C(args, INTEGER_OBJ(cols));
push_call(ui, "grid_scroll", args);
} else {
MAXSIZE_TEMP_ARRAY(args, 4);
ADD_C(args, INTEGER_OBJ(top));
ADD_C(args, INTEGER_OBJ(bot - 1));
ADD_C(args, INTEGER_OBJ(left));
ADD_C(args, INTEGER_OBJ(right - 1));
push_call(ui, "set_scroll_region", args);
kv_size(args) = 0;
ADD_C(args, INTEGER_OBJ(rows));
push_call(ui, "scroll", args);
// some clients have "clear" being affected by scroll region, so reset it.
kv_size(args) = 0;
ADD_C(args, INTEGER_OBJ(0));
ADD_C(args, INTEGER_OBJ(ui->height - 1));
ADD_C(args, INTEGER_OBJ(0));
ADD_C(args, INTEGER_OBJ(ui->width - 1));
push_call(ui, "set_scroll_region", args);
}
}
void remote_ui_default_colors_set(RemoteUI *ui, Integer rgb_fg, Integer rgb_bg, Integer rgb_sp,
Integer cterm_fg, Integer cterm_bg)
{
if (!ui->ui_ext[kUITermColors]) {
HL_SET_DEFAULT_COLORS(rgb_fg, rgb_bg, rgb_sp);
}
MAXSIZE_TEMP_ARRAY(args, 5);
ADD_C(args, INTEGER_OBJ(rgb_fg));
ADD_C(args, INTEGER_OBJ(rgb_bg));
ADD_C(args, INTEGER_OBJ(rgb_sp));
ADD_C(args, INTEGER_OBJ(cterm_fg));
ADD_C(args, INTEGER_OBJ(cterm_bg));
push_call(ui, "default_colors_set", args);
// Deprecated
if (!ui->ui_ext[kUILinegrid]) {
kv_size(args) = 0;
ADD_C(args, INTEGER_OBJ(ui->rgb ? rgb_fg : cterm_fg - 1));
push_call(ui, "update_fg", args);
kv_size(args) = 0;
ADD_C(args, INTEGER_OBJ(ui->rgb ? rgb_bg : cterm_bg - 1));
push_call(ui, "update_bg", args);
kv_size(args) = 0;
ADD_C(args, INTEGER_OBJ(ui->rgb ? rgb_sp : -1));
push_call(ui, "update_sp", args);
}
}
void remote_ui_hl_attr_define(RemoteUI *ui, Integer id, HlAttrs rgb_attrs, HlAttrs cterm_attrs,
Array info)
{
if (!ui->ui_ext[kUILinegrid]) {
return;
}
MAXSIZE_TEMP_ARRAY(args, 4);
ADD_C(args, INTEGER_OBJ(id));
MAXSIZE_TEMP_DICT(rgb, HLATTRS_DICT_SIZE);
MAXSIZE_TEMP_DICT(cterm, HLATTRS_DICT_SIZE);
hlattrs2dict(&rgb, NULL, rgb_attrs, true, false);
hlattrs2dict(&cterm, NULL, rgb_attrs, false, false);
// URLs are not added in hlattrs2dict since they are used only by UIs and not by the highlight
// system. So we add them here.
if (rgb_attrs.url >= 0) {
const char *url = hl_get_url((uint32_t)rgb_attrs.url);
PUT_C(rgb, "url", CSTR_AS_OBJ(url));
}
ADD_C(args, DICT_OBJ(rgb));
ADD_C(args, DICT_OBJ(cterm));
if (ui->ui_ext[kUIHlState]) {
ADD_C(args, ARRAY_OBJ(info));
} else {
ADD_C(args, ARRAY_OBJ((Array)ARRAY_DICT_INIT));
}
push_call(ui, "hl_attr_define", args);
}
void remote_ui_highlight_set(RemoteUI *ui, int id)
{
if (ui->hl_id == id) {
return;
}
ui->hl_id = id;
MAXSIZE_TEMP_DICT(dict, HLATTRS_DICT_SIZE);
hlattrs2dict(&dict, NULL, syn_attr2entry(id), ui->rgb, false);
MAXSIZE_TEMP_ARRAY(args, 1);
ADD_C(args, DICT_OBJ(dict));
push_call(ui, "highlight_set", args);
}
/// "true" cursor used only for input focus
void remote_ui_grid_cursor_goto(RemoteUI *ui, Integer grid, Integer row, Integer col)
{
if (ui->ui_ext[kUILinegrid]) {
MAXSIZE_TEMP_ARRAY(args, 3);
ADD_C(args, INTEGER_OBJ(grid));
ADD_C(args, INTEGER_OBJ(row));
ADD_C(args, INTEGER_OBJ(col));
push_call(ui, "grid_cursor_goto", args);
} else {
ui->cursor_row = row;
ui->cursor_col = col;
remote_ui_cursor_goto(ui, row, col);
}
}
/// emulated cursor used both for drawing and for input focus
void remote_ui_cursor_goto(RemoteUI *ui, Integer row, Integer col)
{
if (ui->client_row == row && ui->client_col == col) {
return;
}
ui->client_row = row;
ui->client_col = col;
MAXSIZE_TEMP_ARRAY(args, 2);
ADD_C(args, INTEGER_OBJ(row));
ADD_C(args, INTEGER_OBJ(col));
push_call(ui, "cursor_goto", args);
}
void remote_ui_put(RemoteUI *ui, const char *cell)
{
ui->client_col++;
MAXSIZE_TEMP_ARRAY(args, 1);
ADD_C(args, CSTR_AS_OBJ(cell));
push_call(ui, "put", args);
}
void remote_ui_raw_line(RemoteUI *ui, Integer grid, Integer row, Integer startcol, Integer endcol,
Integer clearcol, Integer clearattr, LineFlags flags, const schar_T *chunk,
const sattr_T *attrs)
{
// If MAX_SCHAR_SIZE is made larger, we need to refactor implementation below
// to not only use FIXSTR (only up to 0x20 bytes)
STATIC_ASSERT(MAX_SCHAR_SIZE - 1 < 0x20, "SCHAR doesn't fit in fixstr");
if (ui->ui_ext[kUILinegrid]) {
prepare_call(ui, "grid_line");
char **buf = &ui->packer.ptr;
mpack_array(buf, 5);
mpack_uint(buf, (uint32_t)grid);
mpack_uint(buf, (uint32_t)row);
mpack_uint(buf, (uint32_t)startcol);
char *lenpos = mpack_array_dyn16(buf);
uint32_t repeat = 0;
size_t ncells = (size_t)(endcol - startcol);
int last_hl = -1;
uint32_t nelem = 0;
bool was_space = false;
for (size_t i = 0; i < ncells; i++) {
repeat++;
if (i == ncells - 1 || attrs[i] != attrs[i + 1] || chunk[i] != chunk[i + 1]) {
if (
// Close to overflowing the redraw buffer. Finish this event, flush,
// and start a new "grid_line" event at the current position.
// For simplicity leave place for the final "clear" element as well,
// hence the factor of 2 in the check.
UI_BUF_SIZE - BUF_POS(ui) < 2 * (1 + 2 + MAX_SCHAR_SIZE + 5 + 5) + 1
// Also if there is a lot of packed cells, pass them off to the UI to
// let it start processing them.
|| ui->ncells_pending >= 500) {
// If the last chunk was all spaces, add an empty clearing chunk,
// so it's clear that the last chunk wasn't a clearing chunk.
if (was_space) {
nelem++;
ui->ncells_pending += 1;
mpack_array(buf, 3);
mpack_str_small(buf, S_LEN(" "));
mpack_uint(buf, (uint32_t)clearattr);
mpack_uint(buf, 0);
}
mpack_w2(&lenpos, nelem);
// We only ever set the wrap field on the final "grid_line" event for the line.
mpack_bool(buf, false);
ui_flush_buf(ui);
prepare_call(ui, "grid_line");
mpack_array(buf, 5);
mpack_uint(buf, (uint32_t)grid);
mpack_uint(buf, (uint32_t)row);
mpack_uint(buf, (uint32_t)startcol + (uint32_t)i - repeat + 1);
lenpos = mpack_array_dyn16(buf);
nelem = 0;
last_hl = -1;
}
uint32_t csize = (repeat > 1) ? 3 : ((attrs[i] != last_hl) ? 2 : 1);
nelem++;
mpack_array(buf, csize);
char *size_byte = (*buf)++;
size_t len = schar_get_adv(buf, chunk[i]);
*size_byte = (char)(0xa0 | len);
if (csize >= 2) {
mpack_uint(buf, (uint32_t)attrs[i]);
if (csize >= 3) {
mpack_uint(buf, repeat);
}
}
ui->ncells_pending += MIN(repeat, 2);
last_hl = attrs[i];
repeat = 0;
was_space = chunk[i] == schar_from_ascii(' ');
}
}
// If the last chunk was all spaces, add a clearing chunk even if there are
// no more cells to clear, so there is no ambiguity about what to clear.
if (endcol < clearcol || was_space) {
nelem++;
ui->ncells_pending += 1;
mpack_array(buf, 3);
mpack_str_small(buf, S_LEN(" "));
mpack_uint(buf, (uint32_t)clearattr);
mpack_uint(buf, (uint32_t)(clearcol - endcol));
}
mpack_w2(&lenpos, nelem);
mpack_bool(buf, flags & kLineFlagWrap);
} else {
for (int i = 0; i < endcol - startcol; i++) {
remote_ui_cursor_goto(ui, row, startcol + i);
remote_ui_highlight_set(ui, attrs[i]);
char sc_buf[MAX_SCHAR_SIZE];
schar_get(sc_buf, chunk[i]);
remote_ui_put(ui, sc_buf);
if (utf_ambiguous_width(sc_buf)) {
ui->client_col = -1; // force cursor update
}
}
if (endcol < clearcol) {
remote_ui_cursor_goto(ui, row, endcol);
remote_ui_highlight_set(ui, (int)clearattr);
// legacy eol_clear was only ever used with cleared attributes
// so be on the safe side
if (clearattr == 0 && clearcol == Columns) {
Array args = ARRAY_DICT_INIT;
push_call(ui, "eol_clear", args);
} else {
for (Integer c = endcol; c < clearcol; c++) {
remote_ui_put(ui, " ");
}
}
}
}
}
/// Flush the internal packing buffer to the client.
///
/// This might happen multiple times before the actual ui_flush, if the
/// total redraw size is large!
static void ui_flush_buf(RemoteUI *ui)
{
if (!ui->packer.startptr || !BUF_POS(ui)) {
return;
}
flush_event(ui);
if (ui->nevents_pos != NULL) {
mpack_w2(&ui->nevents_pos, ui->nevents);
ui->nevents = 0;
ui->nevents_pos = NULL;
}
WBuffer *buf = wstream_new_buffer(ui->packer.startptr, BUF_POS(ui), 1, free_block);
rpc_write_raw(ui->channel_id, buf);
ui->packer.startptr = NULL;
ui->packer.ptr = NULL;
// we have sent events to the client, but possibly not yet the final "flush" event.
ui->flushed_events = true;
ui->ncells_pending = 0;
}
/// An intentional flush (vsync) when Nvim is finished redrawing the screen
///
/// Clients can know this happened by a final "flush" event at the end of the
/// "redraw" batch.
void remote_ui_flush(RemoteUI *ui)
{
if (ui->nevents > 0 || ui->flushed_events) {
if (!ui->ui_ext[kUILinegrid]) {
remote_ui_cursor_goto(ui, ui->cursor_row, ui->cursor_col);
}
push_call(ui, "flush", (Array)ARRAY_DICT_INIT);
ui_flush_buf(ui);
ui->flushed_events = false;
}
}
static Array translate_contents(RemoteUI *ui, Array contents, Arena *arena)
{
Array new_contents = arena_array(arena, contents.size);
for (size_t i = 0; i < contents.size; i++) {
Array item = contents.items[i].data.array;
Array new_item = arena_array(arena, 2);
int attr = (int)item.items[0].data.integer;
if (attr) {
Dict rgb_attrs = arena_dict(arena, HLATTRS_DICT_SIZE);
hlattrs2dict(&rgb_attrs, NULL, syn_attr2entry(attr), ui->rgb, false);
ADD_C(new_item, DICT_OBJ(rgb_attrs));
} else {
ADD_C(new_item, DICT_OBJ((Dict)ARRAY_DICT_INIT));
}
ADD_C(new_item, item.items[1]);
ADD_C(new_contents, ARRAY_OBJ(new_item));
}
return new_contents;
}
static Array translate_firstarg(RemoteUI *ui, Array args, Arena *arena)
{
Array new_args = arena_array(arena, args.size);
Array contents = args.items[0].data.array;
ADD_C(new_args, ARRAY_OBJ(translate_contents(ui, contents, arena)));
for (size_t i = 1; i < args.size; i++) {
ADD_C(new_args, args.items[i]);
}
return new_args;
}
void remote_ui_event(RemoteUI *ui, char *name, Array args)
{
Arena arena = ARENA_EMPTY;
if (!ui->ui_ext[kUILinegrid]) {
// the representation of highlights in cmdline changed, translate back
// never consumes args
if (strequal(name, "cmdline_show")) {
Array new_args = translate_firstarg(ui, args, &arena);
push_call(ui, name, new_args);
goto free_ret;
} else if (strequal(name, "cmdline_block_show")) {
Array block = args.items[0].data.array;
Array new_block = arena_array(&arena, block.size);
for (size_t i = 0; i < block.size; i++) {
ADD_C(new_block, ARRAY_OBJ(translate_contents(ui, block.items[i].data.array, &arena)));
}
MAXSIZE_TEMP_ARRAY(new_args, 1);
ADD_C(new_args, ARRAY_OBJ(new_block));
push_call(ui, name, new_args);
goto free_ret;
} else if (strequal(name, "cmdline_block_append")) {
Array new_args = translate_firstarg(ui, args, &arena);
push_call(ui, name, new_args);
goto free_ret;
}
}
// Back-compat: translate popupmenu_xx to legacy wildmenu_xx.
if (ui->ui_ext[kUIWildmenu]) {
if (strequal(name, "popupmenu_show")) {
ui->wildmenu_active = (args.items[4].data.integer == -1)
|| !ui->ui_ext[kUIPopupmenu];
if (ui->wildmenu_active) {
Array items = args.items[0].data.array;
Array new_items = arena_array(&arena, items.size);
for (size_t i = 0; i < items.size; i++) {
ADD_C(new_items, items.items[i].data.array.items[0]);
}
MAXSIZE_TEMP_ARRAY(new_args, 1);
ADD_C(new_args, ARRAY_OBJ(new_items));
push_call(ui, "wildmenu_show", new_args);
if (args.items[1].data.integer != -1) {
kv_size(new_args) = 0;
ADD_C(new_args, args.items[1]);
push_call(ui, "wildmenu_select", new_args);
}
goto free_ret;
}
} else if (strequal(name, "popupmenu_select")) {
if (ui->wildmenu_active) {
name = "wildmenu_select";
}
} else if (strequal(name, "popupmenu_hide")) {
if (ui->wildmenu_active) {
name = "wildmenu_hide";
}
}
}
push_call(ui, name, args);
return;
free_ret:
arena_mem_free(arena_finish(&arena));
}
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