1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
// deals with textDocument/signatureHelp LSP requests
// this is the little thing which shows you the signature of the function and the current argument
#include "ted-internal.h"
/// a single signature in the signature help.
typedef struct {
/// displayed normal
char *label_pre;
/// displayed bold
char *label_active;
/// displayed normal
char *label_post;
} Signature;
struct SignatureHelp {
LSPServerRequestID last_request;
/// should we resend a signature help request this frame?
bool retrigger;
/// if signature_count = 0, signature help is closed
u16 signature_count;
Signature signatures[SIGNATURE_HELP_MAX];
};
void signature_help_init(Ted *ted) {
ted->signature_help = calloc(1, sizeof *ted->signature_help);
}
static void signature_help_clear(SignatureHelp *help) {
for (int i = 0; i < help->signature_count; ++i) {
Signature sig = help->signatures[i];
free(sig.label_pre);
free(sig.label_active);
free(sig.label_post);
}
memset(help->signatures, 0, sizeof help->signatures);
help->signature_count = 0;
}
static void signature_help_send_request(Ted *ted) {
SignatureHelp *help = ted->signature_help;
const Settings *settings = ted_active_settings(ted);
if (!settings->signature_help_enabled) {
signature_help_clear(help);
return;
}
TextBuffer *buffer = ted->active_buffer;
if (!buffer) {
signature_help_clear(help);
return;
}
LSP *lsp = buffer_lsp(buffer);
if (!lsp) {
signature_help_clear(help);
return;
}
LSPRequest request = {.type = LSP_REQUEST_SIGNATURE_HELP};
LSPRequestSignatureHelp *s = &request.data.signature_help;
s->position = buffer_cursor_pos_as_lsp_document_position(buffer);
ted_cancel_lsp_request(ted, &help->last_request);
help->last_request = lsp_send_request(lsp, &request);
help->retrigger = false;
}
void signature_help_retrigger(Ted *ted) {
// don't just send the request here -- we don't want to send more than
// one request per frame.
ted->signature_help->retrigger = true;
}
void signature_help_open(Ted *ted, uint32_t trigger) {
(void)trigger; // for now we don't send context
signature_help_send_request(ted);
}
bool signature_help_is_open(Ted *ted) {
return ted->signature_help->signature_count > 0;
}
void signature_help_close(Ted *ted) {
SignatureHelp *help = ted->signature_help;
signature_help_clear(help);
ted_cancel_lsp_request(ted, &help->last_request);
}
void signature_help_process_lsp_response(Ted *ted, const LSPResponse *response) {
SignatureHelp *help = ted->signature_help;
const Settings *settings = ted_active_settings(ted);
if (!settings->signature_help_enabled) return;
if (response->request.type != LSP_REQUEST_SIGNATURE_HELP)
return;
if (response->request.id != help->last_request.id) {
// stale request
return;
}
help->last_request.id = 0;
const LSPResponseSignatureHelp *lsp_help = &response->data.signature_help;
u32 signature_count = arr_len(lsp_help->signatures);
if (signature_count > SIGNATURE_HELP_MAX)
signature_count = SIGNATURE_HELP_MAX;
signature_help_clear(help);
for (u32 s = 0; s < signature_count; ++s) {
Signature *signature = &help->signatures[s];
LSPSignatureInformation *lsp_signature = &lsp_help->signatures[s];
const char *label = lsp_response_string(response, lsp_signature->label);
size_t start = unicode_utf16_to_utf8_offset(label, lsp_signature->active_start);
size_t end = unicode_utf16_to_utf8_offset(label, lsp_signature->active_end);
if (start == (size_t)-1) {
assert(0);
start = 0;
}
if (end == (size_t)-1) {
assert(0);
end = 0;
}
u32 active_start = (u32)start;
u32 active_end = (u32)end;
signature->label_pre = strn_dup(label, active_start);
signature->label_active = strn_dup(label + active_start, active_end - active_start);
signature->label_post = str_dup(label + active_end);
}
help->signature_count = (u16)signature_count;
}
void signature_help_frame(Ted *ted) {
const Settings *settings = ted_active_settings(ted);
if (!settings->signature_help_enabled)
return;
SignatureHelp *help = ted->signature_help;
if (help->retrigger)
signature_help_send_request(ted);
u16 signature_count = help->signature_count;
if (!signature_count)
return;
Font *font = ted->font;
Font *font_bold = ted->font_bold;
TextBuffer *buffer = ted->active_buffer;
if (!buffer)
return;
float border = settings->border_thickness;
Rect buf_rect = buffer_rect(buffer);
float width = buf_rect.size.x;
float height = FLT_MAX;
const float char_height = text_font_char_height(font);
// make sure signature help doesn't take up too much space
while (1) {
height = char_height * signature_count;
if (height < buffer_rect(buffer).size.y * 0.25f)
break;
--signature_count;
if (signature_count == 0) return;
}
float x = buf_rect.pos.x, y;
vec2 cursor_pos = buffer_pos_to_pixels(buffer, buffer_cursor_pos(buffer));
if (cursor_pos.y < rect_ymid(buffer_rect(buffer))) {
// signature help on bottom
y = rect_y2(buf_rect) - height;
gl_geometry_rect(rect_xywh(x, y - border, width, border),
settings_color(settings, COLOR_AUTOCOMPLETE_BORDER));
} else {
// signature help on top
y = rect_y1(buf_rect);
gl_geometry_rect(rect_xywh(x, y + height + 1 - border, width, border),
settings_color(settings, COLOR_AUTOCOMPLETE_BORDER));
}
gl_geometry_rect(rect_xywh(x, y, width, height),
settings_color(settings, COLOR_AUTOCOMPLETE_BG));
// draw the signatures
for (int s = 0; s < signature_count; ++s) {
const Signature *signature = &help->signatures[s];
TextRenderState state = text_render_state_default;
state.x = x;
state.y = y;
state.min_x = x;
state.min_y = y;
state.max_x = rect_x2(buf_rect);
state.max_y = rect_y2(buf_rect);
settings_color_floats(settings, COLOR_TEXT, state.color);
text_utf8_with_state(font, &state, signature->label_pre);
text_utf8_with_state(font_bold, &state, signature->label_active);
text_utf8_with_state(font, &state, signature->label_post);
y += char_height;
}
gl_geometry_draw();
text_render(font);
text_render(font_bold);
}
void signature_help_quit(Ted *ted) {
signature_help_close(ted);
free(ted->signature_help);
ted->signature_help = NULL;
}
|
