Commit a8cd10dc authored by Moritz Lipp's avatar Moritz Lipp

Synctex forward synchronisation

parent a8ea4a63
/* See LICENSE file for license and copyright information */
#include <glib.h>
#include <glib/gi18n.h>
#include "synctex.h"
#include "zathura.h"
#include "page.h"
#include "document.h"
#include "utils.h"
#include <glib.h>
#include <girara/session.h>
enum {
SYNCTEX_RESULT_BEGIN = 1,
SYNCTEX_RESULT_END,
SYNCTEX_PROP_PAGE,
SYNCTEX_PROP_H,
SYNCTEX_PROP_V,
SYNCTEX_PROP_WIDTH,
SYNCTEX_PROP_HEIGHT,
};
typedef struct token_s {
const char* name;
guint token;
} token_t;
static token_t scanner_tokens[] = {
{"SyncTeX result begin", SYNCTEX_RESULT_BEGIN},
{"SyncTeX result end", SYNCTEX_RESULT_END},
{"Page:", SYNCTEX_PROP_PAGE},
{"h:", SYNCTEX_PROP_H},
{"v:", SYNCTEX_PROP_V},
{"W:", SYNCTEX_PROP_WIDTH},
{"H:", SYNCTEX_PROP_HEIGHT},
{NULL, 0}
};
static GScannerConfig scanner_config = {
.cset_skip_characters = "\n\r",
.cset_identifier_first = G_CSET_a_2_z G_CSET_A_2_Z,
.cset_identifier_nth = G_CSET_a_2_z G_CSET_A_2_Z ": ",
.cpair_comment_single = NULL,
.case_sensitive = TRUE,
.scan_identifier = TRUE,
.scan_symbols = TRUE,
.scan_float = TRUE,
.numbers_2_int = TRUE,
};
static void synctex_record_hits(zathura_t* zathura, int page_idx, girara_list_t* hits, bool first);
static double scan_float(GScanner* scanner);
static bool synctex_view(zathura_t* zathura, char* position);
void
synctex_edit(zathura_t* zathura, zathura_page_t* page, int x, int y)
......@@ -38,3 +84,154 @@ synctex_edit(zathura_t* zathura, zathura_page_t* page, int x, int y)
g_free(buffer);
}
static void
synctex_record_hits(zathura_t* zathura, int page_idx, girara_list_t* hits, bool first)
{
zathura_page_t* page = zathura_document_get_page(zathura->document, page_idx-1);
if (page == NULL)
return;
GtkWidget* page_widget = zathura_page_get_widget(zathura, page);
g_object_set(page_widget, "draw-links", FALSE, NULL);
g_object_set(page_widget, "search-results", hits, NULL);
if (first) {
page_set_delayed(zathura, zathura_page_get_index(page));
g_object_set(page_widget, "search-current", 0, NULL);
}
}
static double
scan_float(GScanner* scanner) {
switch (g_scanner_get_next_token(scanner)) {
case G_TOKEN_FLOAT:
return g_scanner_cur_value(scanner).v_float;
case G_TOKEN_INT:
return g_scanner_cur_value(scanner).v_int;
default:
return 0.0;
}
}
static bool
synctex_view(zathura_t* zathura, char* position)
{
char* filename = g_strdup(zathura_document_get_path(zathura->document));
char* argv[] = {"synctex", "view", "-i", position, "-o", filename, NULL};
gint output;
bool ret = g_spawn_async_with_pipes(NULL, argv, NULL, G_SPAWN_SEARCH_PATH | G_SPAWN_STDERR_TO_DEV_NULL, NULL, NULL, NULL, NULL, &output, NULL, NULL);
g_free(filename);
if (ret == false) {
return false;
}
GScanner* scanner = g_scanner_new(&scanner_config);
token_t* tokens = scanner_tokens;
while (tokens->name != NULL) {
g_scanner_add_symbol(scanner, tokens->name, GINT_TO_POINTER(tokens->token));
tokens++;
}
g_scanner_input_file(scanner, output);
bool found_begin = false, found_end = false;
while (found_begin == false && found_end == false) {
switch (g_scanner_get_next_token(scanner)) {
case G_TOKEN_EOF:
found_end = true;
break;
case G_TOKEN_SYMBOL:
switch (GPOINTER_TO_INT(g_scanner_cur_value(scanner).v_identifier)) {
case SYNCTEX_RESULT_BEGIN:
found_begin = true;
break;
}
break;
default:
/* skip everything else */
break;
}
}
if (found_begin == true) {
unsigned int number_of_pages = zathura_document_get_number_of_pages(zathura->document);
for (unsigned int page_id = 0; page_id < number_of_pages; ++page_id) {
zathura_page_t* page = zathura_document_get_page(zathura->document, page_id);
if (page == NULL) {
continue;
}
g_object_set(zathura_page_get_widget(zathura, page), "search-results", NULL, NULL);
}
}
ret = false;
int page = -1, nextpage;
girara_list_t* hitlist = NULL;
zathura_rectangle_t* rectangle = NULL;
while (found_end == false) {
switch (g_scanner_get_next_token(scanner)) {
case G_TOKEN_EOF:
found_end = true;
break;
case G_TOKEN_SYMBOL:
switch (GPOINTER_TO_INT(g_scanner_cur_value(scanner).v_identifier)) {
case SYNCTEX_RESULT_END:
found_end = true;
break;
case SYNCTEX_PROP_PAGE:
if (g_scanner_get_next_token(scanner) == G_TOKEN_INT) {
nextpage = g_scanner_cur_value(scanner).v_int;
if (page != nextpage) {
if (hitlist) {
synctex_record_hits(zathura, page, hitlist, !ret);
ret = true;
}
hitlist = girara_list_new2((girara_free_function_t) g_free);
page = nextpage;
}
rectangle = g_malloc0(sizeof(zathura_rectangle_t));
girara_list_append(hitlist, rectangle);
}
break;
case SYNCTEX_PROP_H:
rectangle->x1 = scan_float(scanner);
break;
case SYNCTEX_PROP_V:
rectangle->y2 = scan_float(scanner);
break;
case SYNCTEX_PROP_WIDTH:
rectangle->x2 = rectangle->x1 + scan_float(scanner);
break;
case SYNCTEX_PROP_HEIGHT:
rectangle->y1 = rectangle->y2 - scan_float(scanner);
break;
}
break;
default:
break;
}
}
if (hitlist != NULL) {
synctex_record_hits(zathura, page, hitlist, !ret);
ret = true;
}
g_scanner_destroy(scanner);
close(output);
return ret;
}
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