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// LSP hover information (textDocument/hover request)
void hover_close(Ted *ted) {
Hover *hover = &ted->hover;
hover->open = false;
free(hover->text);
hover->text = NULL;
}
static bool get_hover_position(Ted *ted, LSPDocumentPosition *pos, TextBuffer **pbuffer, LSP **lsp) {
// find the buffer where the mouse is
for (int i = 0; i < TED_MAX_BUFFERS; ++i) {
TextBuffer *buffer = &ted->buffers[i];
if (!buffer->filename) continue;
LSP *l = buffer_lsp(buffer);
if (!l) continue;
BufferPos mouse_pos = {0};
if (buffer_pixels_to_pos(buffer, ted->mouse_pos, &mouse_pos)) {
if (pos) *pos = buffer_pos_to_lsp_document_position(buffer, mouse_pos);
if (pbuffer) *pbuffer = buffer;
if (lsp) *lsp = l;
return true;
}
}
return false;
}
void hover_send_request(Ted *ted) {
Hover *hover = &ted->hover;
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->requested_lsp = lsp->id;
lsp_send_request(lsp, &request);
}
}
void hover_process_lsp_response(Ted *ted, LSPResponse *response) {
if (!response) return;
if (response->request.type != LSP_REQUEST_HOVER) return;
Hover *hover = &ted->hover;
LSPResponseHover *hover_response = &response->data.hover;
TextBuffer *buffer=0;
LSPDocumentPosition pos={0};
LSP *lsp=0;
get_hover_position(ted, &pos, &buffer, &lsp);
if (hover->text // we already have hover text
&& (
lsp->id != hover->requested_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;
if (buffer) {
hover->range_start = buffer_pos_from_lsp(buffer, hover_response->range.start);
hover->range_end = buffer_pos_from_lsp(buffer, hover_response->range.end);
}
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 && isspace(*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 shift_down = SDL_GetKeyboardState(NULL)[SDL_SCANCODE_LSHIFT]
|| SDL_GetKeyboardState(NULL)[SDL_SCANCODE_RSHIFT];
if (!shift_down) {
hover_close(ted);
}
(void)dt;
if (!hover->open) {
if (shift_down) {
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->requested_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 x = ted->mouse_pos.x, y = ted->mouse_pos.y + font->char_height;
float char_height = font->char_height;
BufferPos range_start = hover->range_start, range_end = hover->range_end;
if (!buffer_pos_eq(range_start, range_end)) {
// draw the highlight
if (range_start.line == range_end.line) {
v2 a = buffer_pos_to_pixels(buffer, range_start);
v2 b = buffer_pos_to_pixels(buffer, range_end);
b.y += char_height;
gl_geometry_rect(rect_endpoints(a, b), colors[COLOR_HOVER_HL]);
} else if (range_end.line - range_start.line < 1000) { // prevent gigantic highlights from slowing things down
// multiple lines.
v2 a = buffer_pos_to_pixels(buffer, range_start);
v2 b = buffer_pos_to_pixels(buffer, buffer_pos_end_of_line(buffer, range_start.line));
b.y += char_height;
gl_geometry_rect(rect_endpoints(a, b), colors[COLOR_HOVER_HL]);
for (u32 line = range_start.line + 1; line < range_end.line; ++line) {
// these lines are fully contained in the range.
BufferPos start = buffer_pos_start_of_line(buffer, line);
BufferPos end = buffer_pos_end_of_line(buffer, line);
a = buffer_pos_to_pixels(buffer, start);
b = buffer_pos_to_pixels(buffer, end);
b.y += char_height;
gl_geometry_rect(rect_endpoints(a, b), colors[COLOR_HOVER_HL]);
}
// last line
a = buffer_pos_to_pixels(buffer, buffer_pos_start_of_line(buffer, range_end.line));
b = buffer_pos_to_pixels(buffer, range_end);
b.y += char_height;
gl_geometry_rect(rect_endpoints(a, b), colors[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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