Remove support for old libsynctex

Debian buster will have a new enough libsynctex.

README

@@ -17,7 +17,7 @@ The following dependencies are optional:
 
 * sqlite3 (>= 3.6.23): splite3 database backend
 * libmagic from file(1): for mime-type detection
-* libsynctex from TeXLive: SyncTeX support
+* libsynctex from TeXLive (>= 1.19): SyncTeX support
 * libseccomp: sandbox support
 
 For building zathura, the following dependencies are also required:

meson.build

@@ -69,7 +69,7 @@ flags = cc.get_supported_arguments(flags)
 # optional dependencies
 additional_sources = []
 sqlite = dependency('sqlite3', version: '>=3.6.23', required: get_option('sqlite'))
-synctex = dependency('synctex', required: get_option('synctex'))
+synctex = dependency('synctex', version: '>=1.19', required: get_option('synctex'))
 magic = cc.find_library('magic', required: get_option('magic'))
 seccomp = dependency('libseccomp', required: get_option('seccomp'))
 
@@ -82,12 +82,8 @@ endif
 if synctex.found()
   build_dependencies += synctex
   defines += '-DWITH_SYNCTEX'
-  if synctex.version() < '2.0.0'
-    if synctex.version() >= '1.19.0'
-      warning('You are using a synctex version pre-SONAME bump, but post-ABI-break. Please make sure to always run zathura using the correct synctex version.')
-    else
-      defines += '-DWITH_SYNCTEX1'
-    endif
+  if synctex.version() < '2.0.0' and synctex.version() >= '1.19.0'
+    warning('You are using a synctex version pre-SONAME bump, but post-ABI-break. Please make sure to always run zathura using the correct synctex version.')
   endif
 endif
 

zathura/synctex.c

@@ -16,14 +16,6 @@
 #include "adjustment.h"
 
 #ifdef WITH_SYNCTEX
-#ifdef WITH_SYNCTEX1
-typedef synctex_scanner_t synctex_scanner_p;
-typedef synctex_node_t synctex_node_p;
-
-#define synctex_scanner_next_result(scanner) synctex_next_result(scanner)
-#define synctex_display_query(scanner, file, line, column, page) synctex_display_query(scanner, file, line, column)
-#endif
-
 bool
 synctex_get_input_line_column(const char* filename, unsigned int page, int x, int y,
     char** input_file, unsigned int* line, unsigned int* column)