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#include "buffer.h"
#include <string.h>
#include "dged/buffer.h"
#include "dged/buffer_view.h"
#include "dged/buffers.h"
#include "dged/minibuffer.h"
#include "main/completion.h"
static bool is_space(const struct codepoint *c) {
// TODO: utf8 whitespace and other whitespace
return c->codepoint == ' ';
}
typedef void (*on_buffer_selected_cb)(struct buffer *);
struct buffer_completion {
struct buffer *buffer;
on_buffer_selected_cb on_buffer_selected;
};
struct buffer_provider_data {
struct buffers *buffers;
on_buffer_selected_cb on_buffer_selected;
};
static void buffer_comp_selected(void *data, struct buffer_view *target) {
struct buffer_completion *bc = (struct buffer_completion *)data;
buffer_set_text(target->buffer, (uint8_t *)bc->buffer->name,
strlen(bc->buffer->name));
abort_completion();
bc->on_buffer_selected(bc->buffer);
}
static struct region buffer_comp_render(void *data,
struct buffer *comp_buffer) {
struct buffer *buffer = ((struct buffer_completion *)data)->buffer;
struct location begin = buffer_end(comp_buffer);
buffer_add(comp_buffer, buffer_end(comp_buffer), (uint8_t *)buffer->name,
strlen(buffer->name));
struct location end = buffer_end(comp_buffer);
buffer_newline(comp_buffer, buffer_end(comp_buffer));
return region_new(begin, end);
}
static void buffer_comp_cleanup(void *data) {
struct buffer_completion *bc = (struct buffer_completion *)data;
free(bc);
}
struct needle_match_ctx {
const char *needle;
struct completion *completions;
uint32_t max_ncompletions;
uint32_t ncompletions;
on_buffer_selected_cb on_buffer_selected;
};
static void buffer_matches(struct buffer *buffer, void *userdata) {
struct needle_match_ctx *ctx = (struct needle_match_ctx *)userdata;
if (strncmp(ctx->needle, buffer->name, strlen(ctx->needle)) == 0 &&
ctx->ncompletions < ctx->max_ncompletions) {
struct buffer_completion *comp_data =
calloc(1, sizeof(struct buffer_completion));
comp_data->buffer = buffer;
comp_data->on_buffer_selected = ctx->on_buffer_selected;
ctx->completions[ctx->ncompletions] = (struct completion){
.render = buffer_comp_render,
.selected = buffer_comp_selected,
.cleanup = buffer_comp_cleanup,
.data = comp_data,
};
++ctx->ncompletions;
}
}
static void buffer_complete(struct completion_context ctx, bool deletion,
void *userdata) {
(void)deletion;
struct buffer_provider_data *pd = (struct buffer_provider_data *)userdata;
struct buffers *buffers = pd->buffers;
if (buffers == NULL) {
return;
}
struct text_chunk txt = {0};
if (ctx.buffer == minibuffer_buffer()) {
txt = minibuffer_content();
} else {
struct match_result start =
buffer_find_prev_in_line(ctx.buffer, ctx.location, is_space);
if (!start.found) {
start.at = (struct location){.line = ctx.location.line, .col = 0};
return;
}
txt = buffer_region(ctx.buffer, region_new(start.at, ctx.location));
}
char *needle = calloc(txt.nbytes + 1, sizeof(char));
memcpy(needle, txt.text, txt.nbytes);
needle[txt.nbytes] = '\0';
if (txt.allocated) {
free(txt.text);
}
struct completion *completions = calloc(50, sizeof(struct completion));
struct needle_match_ctx match_ctx = (struct needle_match_ctx){
.needle = needle,
.max_ncompletions = 50,
.completions = completions,
.ncompletions = 0,
.on_buffer_selected = pd->on_buffer_selected,
};
buffers_for_each(buffers, buffer_matches, &match_ctx);
ctx.add_completions(match_ctx.completions, match_ctx.ncompletions);
free(completions);
free(needle);
}
static void cleanup_provider(void *data) {
struct buffer_provider_data *bpd = (struct buffer_provider_data *)data;
free(bpd);
}
struct completion_provider
create_buffer_provider(struct buffers *buffers,
on_buffer_selected_cb on_buffer_selected) {
struct buffer_provider_data *data =
calloc(1, sizeof(struct buffer_provider_data));
data->buffers = buffers;
data->on_buffer_selected = on_buffer_selected;
return (struct completion_provider){
.name = "buffers",
.complete = buffer_complete,
.userdata = data,
.cleanup = cleanup_provider,
};
}
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