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// LSP hover information (textDocument/hover request)
#include "ted-internal.h"
struct Hover {
LSPServerRequestID last_request;
/// is some hover info being displayed?
bool open;
/// text to display
char *text;
/// where the hover data is coming from.
/// we use this to check if we need to refresh it.
LSPDocumentPosition requested_position;
/// range in document to highlight
LSPRange range;
/// how long the cursor has been hovering for
double time;
};
void hover_init(Ted *ted) {
ted->hover = calloc(1, sizeof *ted->hover);
}
void hover_quit(Ted *ted) {
hover_close(ted);
free(ted->hover);
ted->hover = NULL;
}
void hover_close(Ted *ted) {
Hover *hover = ted->hover;
hover->open = false;
free(hover->text);
hover->text = NULL;
ted_cancel_lsp_request(ted, &hover->last_request);
}
void hover_reset_timer(Ted *ted) {
ted->hover->time = 0.0;
}
static bool get_hover_position(Ted *ted, LSPDocumentPosition *pos, TextBuffer **pbuffer, LSP **lsp) {
BufferPos mouse_pos = {0};
TextBuffer *buffer = NULL;
if (ted_get_mouse_buffer_pos(ted, &buffer, &mouse_pos)) {
LSP *l = buffer_lsp(buffer);
if (!l) return false;
if (pos) *pos = buffer_pos_to_lsp_document_position(buffer, mouse_pos);
if (pbuffer) *pbuffer = buffer;
if (lsp) *lsp = l;
return true;
}
return false;
}
static void hover_send_request(Ted *ted) {
Hover *hover = ted->hover;
ted_cancel_lsp_request(ted, &hover->last_request);
LSPRequest request = {.type = LSP_REQUEST_HOVER};
LSPRequestHover *h = &request.data.hover;
LSP *lsp = NULL;
if (get_hover_position(ted, &h->position, NULL, &lsp)) {
hover->requested_position = h->position;
hover->last_request = lsp_send_request(lsp, &request);
}
}
void hover_process_lsp_response(Ted *ted, const LSPResponse *response) {
if (!response) return;
if (response->request.type != LSP_REQUEST_HOVER) return;
Hover *hover = ted->hover;
if (response->request.id != hover->last_request.id) {
// stale request
return;
}
hover->last_request.id = 0;
const LSPResponseHover *hover_response = &response->data.hover;
TextBuffer *buffer=0;
LSPDocumentPosition pos={0};
LSP *lsp=0;
if (!get_hover_position(ted, &pos, &buffer, &lsp)) {
free(hover->text); hover->text = NULL;
return;
}
if (hover->text // we already have hover text
&& (
lsp->id != hover->last_request.lsp // this request is from a different LSP
|| !lsp_document_position_eq(response->request.data.hover.position, pos) // this request is for a different position
)) {
// this is a stale request. ignore it
return;
}
free(hover->text); hover->text = NULL;
hover->range = hover_response->range;
const char *contents = lsp_response_string(response, hover_response->contents);
if (*contents) {
hover->text = str_dup(contents);
char *p = hover->text + strlen(hover->text) - 1;
// remove trailing whitespace
// (rust-analyzer gives us trailing newlines for local variables)
for (; p > hover->text && strchr("\n \t", *p); --p)
*p = '\0';
}
}
void hover_frame(Ted *ted, double dt) {
const Settings *settings = ted_active_settings(ted);
if (!settings->hover_enabled)
return;
Hover *hover = ted->hover;
bool key_down = ted_is_key_combo_down(ted, settings->hover_key);
bool open_hover = key_down || hover->time >= settings->hover_time;
hover->time += dt;
if (!open_hover)
hover_close(ted);
(void)dt;
if (!hover->open) {
if (open_hover) {
hover_send_request(ted);
hover->open = true;
}
return;
}
TextBuffer *buffer=0;
{
LSPDocumentPosition pos={0};
LSP *lsp=0;
if (get_hover_position(ted, &pos, &buffer, &lsp)) {
if (lsp->id != hover->last_request.lsp
|| !lsp_document_position_eq(pos, hover->requested_position)) {
// refresh hover
hover_send_request(ted);
}
} else {
hover_close(ted);
return;
}
}
const float padding = settings->padding;
const float border = settings->border_thickness;
const u32 *colors = settings->colors;
const char *text = hover->text;
Font *font = ted->font;
float char_height = text_font_char_height(font);
float x = ted->mouse_pos.x, y = ted->mouse_pos.y + char_height;
buffer_highlight_lsp_range(buffer, hover->range, COLOR_HOVER_HL);
if (hover->text) {
float max_width = 400;
TextRenderState state = text_render_state_default;
state.x = state.min_x = x;
state.y = state.min_y = y;
state.render = false;
state.wrap = true;
state.max_x = x + max_width;
state.max_y = ted->window_height;
text_utf8_with_state(font, &state, text);
float width = (float)(state.x_largest - x);
float height = (float)(state.y_largest - y) + char_height;
if (height > 300) {
height = 300;
}
if (x + width > ted->window_width)
x -= width; // open left
if (y + height > ted->window_height)
y -= height + char_height * 2; // open up
state.x = state.min_x = x;
state.y = state.min_y = y;
state.max_x = x + max_width;
state.y = y;
state.render = true;
state.max_y = y + height;
Rect rect = rect_xywh(x - padding, y - padding, width + 2*padding, height + 2*padding);
gl_geometry_rect(rect, colors[COLOR_HOVER_BG]);
gl_geometry_rect_border(rect, border, colors[COLOR_HOVER_BORDER]);
rgba_u32_to_floats(colors[COLOR_HOVER_TEXT], state.color);
text_utf8_with_state(font, &state, text);
}
gl_geometry_draw();
text_render(font);
}
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