[Theme] Try to fix importing of theme.

- Fix the two place of resolving into one method.
- Do not accept file in CWD.
- Prefer file if it exists in same directory as parent file that
  imported it.

fixes: #1889

doc/rofi-theme.5

@@ -2408,6 +2408,10 @@ If a filename is provided, it will try to resolve it in the following order:
 
 .RS
 .IP \(bu 2
+If path is absolute and file exists, it will pick open the file. This includes expansion of '~' or '~user'
+.IP \(bu 2
+On an \fB\fC@import\fR or \fB\fC@theme\fR it looks in the directory of the file that tried to import it.
+.IP \(bu 2
 \fB\fC${XDG_CONFIG_HOME}/rofi/themes/\fR
 .IP \(bu 2
 \fB\fC${XDG_CONFIG_HOME}/rofi/\fR
@@ -2419,7 +2423,7 @@ If a filename is provided, it will try to resolve it in the following order:
 .RE
 
 .PP
-A name is resolved as a filename by appending the \fB\fC\&.rasi\fR extension.
+A name is resolved (if it has no valid extension) as a filename by appending the \fB\fC\&.rasi\fR extension.
 
 .SH Examples
 .PP

doc/rofi-theme.5.markdown

@@ -1626,12 +1626,14 @@ The specified file can either by *name*, *filename*,*full path*.
 
 If a filename is provided, it will try to resolve it in the following order:
 
+- If path is absolute and file exists, it will pick open the file. This includes expansion of '~' or '~user'
+- On an `@import` or `@theme` it looks in the directory of the file that tried to import it.
 - `${XDG_CONFIG_HOME}/rofi/themes/`
 - `${XDG_CONFIG_HOME}/rofi/`
 - `${XDG_DATA_HOME}/rofi/themes/`
 - `${INSTALL PREFIX}/share/rofi/themes/`
 
-A name is resolved as a filename by appending the `.rasi` extension.
+A name is resolved (if it has no valid extension) as a filename by appending the `.rasi` extension.
 
 ## Examples
 

include/helper.h

@@ -397,8 +397,9 @@ char *helper_string_replace_if_exists(char *string, ...);
  *
  * @returns path to theme or copy of filename if not found.
  */
-char *helper_get_theme_path(const char *file, const char **ext)
-    __attribute__((nonnull));
+char *helper_get_theme_path(const char *file, const char **ext,
+                            const char *parent_dir)
+    __attribute__((nonnull(1, 2)));
 
 /**
  * @param name The name of the element to find.

include/theme.h

@@ -327,13 +327,12 @@ void rofi_theme_reset(void);
 
 /**
  * @param file File name to prepare.
- * @param parent_file Filename of parent file.
  *
  * Tries to find full path relative to parent file.
  *
  * @returns full path to file.
  */
-char *rofi_theme_parse_prepare_file(const char *file, const char *parent_file);
+char *rofi_theme_parse_prepare_file(const char *file);
 
 /**
  * Process conditionals.

lexer/theme-lexer.l

@@ -415,8 +415,8 @@ if ( queue == NULL ) {
     yytext[yyleng-1] = '\0';
     ParseObject *top = g_queue_peek_head ( file_queue );
     g_assert ( top != NULL );
-    char *file2 = helper_get_theme_path ( &yytext[1], rasi_theme_file_extensions );
-    char *filename = rofi_theme_parse_prepare_file ( file2, top->filename );
+    char *file2 = helper_get_theme_path ( &yytext[1], rasi_theme_file_extensions, top->filename );
+    char *filename = rofi_theme_parse_prepare_file ( file2 );
     g_free ( file2 );
     FILE *f = fopen ( filename, "rb" );
     if ( f ) {
@@ -883,8 +883,8 @@ if ( queue == NULL ) {
 
 gboolean rofi_theme_parse_file ( const char *file )
 {
-    char *file2 = helper_get_theme_path ( file, rasi_theme_file_extensions );
-    char *filename = rofi_theme_parse_prepare_file ( file2, NULL );
+    char *file2 = helper_get_theme_path ( file, rasi_theme_file_extensions, NULL );
+    char *filename = rofi_theme_parse_prepare_file ( file2 );
     g_free ( file2 );
 
     yyin = fopen ( filename, "rb" );

source/helper.c

@@ -1064,13 +1064,8 @@ gboolean helper_execute_command(const char *wd, const char *cmd,
   return helper_execute(wd, args, "", cmd, context);
 }
 
-char *helper_get_theme_path(const char *file, const char **ext) {
-  char *filename = rofi_expand_path(file);
-  g_debug("Opening theme, testing: %s\n", filename);
-  if (g_file_test(filename, G_FILE_TEST_EXISTS)) {
-    return filename;
-  }
-  g_free(filename);
+char *helper_get_theme_path(const char *file, const char **ext,
+                            const char *parent_file) {
 
   gboolean ext_found = FALSE;
   for (const char **i = ext; *i != NULL; i++) {
@@ -1079,13 +1074,41 @@ char *helper_get_theme_path(const char *file, const char **ext) {
       break;
     }
   }
+  char *filename = NULL;
   if (ext_found) {
-    filename = g_strdup(file);
+    filename = rofi_expand_path(file);
   } else {
     g_assert_nonnull(ext[0]);
+    char *temp = rofi_expand_path(file);
     // TODO: Pick the first extension. needs fixing.
-    filename = g_strconcat(file, ext[0], NULL);
+    filename = g_strconcat(temp, ext[0], NULL);
+    g_free(temp);
   }
+  g_debug("Opening theme, testing: %s\n", filename);
+  if (g_path_is_absolute(filename)) {
+    g_debug("Opening theme, path is absolute: %s", filename);
+    if (g_file_test(filename, G_FILE_TEST_EXISTS)) {
+      return filename;
+    }
+    g_debug("Opening theme, path is absolute but does not exists: %s",
+            filename);
+  } else {
+    if (parent_file != NULL) {
+      // If no absolute path specified, expand it.
+      char *basedir = g_path_get_dirname(parent_file);
+      char *path = g_build_filename(basedir, filename, NULL);
+      g_free(basedir);
+      g_debug("Opening theme, check in dir where file is included: %s", path);
+      if (g_file_test(path, G_FILE_TEST_EXISTS)) {
+        g_free(filename);
+        return path;
+      }
+      g_debug("Opening theme, file does not exists in dir where file is "
+              "included: %s\n",
+              filename);
+    }
+  }
+
   // Check config's themes directory.
   const char *cpath = g_get_user_config_dir();
   if (cpath) {

source/rofi-icon-fetcher.c

@@ -334,7 +334,7 @@ static void rofi_icon_fetcher_worker(thread_state *sdata,
       if (ext) {
         const char *exts2[2] = {ext, NULL};
         icon_path = icon_path_ =
-            helper_get_theme_path(sentry->entry->name, exts2);
+            helper_get_theme_path(sentry->entry->name, exts2, NULL);
       }
       if (icon_path_ == NULL) {
         sentry->query_done = TRUE;

source/theme.c

@@ -1434,16 +1434,9 @@ void distance_get_linestyle(RofiDistance d, cairo_t *draw) {
   }
 }
 
-char *rofi_theme_parse_prepare_file(const char *file, const char *parent_file) {
-  char *filename = rofi_expand_path(file);
-  // If no absolute path specified, expand it.
-  if (parent_file != NULL && !g_path_is_absolute(filename)) {
-    char *basedir = g_path_get_dirname(parent_file);
-    char *path = g_build_filename(basedir, filename, NULL);
-    g_free(filename);
-    filename = path;
-    g_free(basedir);
-  }
+char *rofi_theme_parse_prepare_file(const char *file) {
+  char *filename = g_strdup(file);
+  // TODO: Why did I write this code? I think it was to get full path.
   GFile *gf = g_file_new_for_path(filename);
   parsed_config_files = g_list_append(parsed_config_files, filename);
   filename = g_file_get_path(gf);

test/box-test.c

@@ -92,7 +92,8 @@ gboolean config_parse_set_property(G_GNUC_UNUSED const Property *p,
 }
 char *rofi_expand_path(G_GNUC_UNUSED const char *path) { return NULL; }
 
-char *helper_get_theme_path(const char *file, G_GNUC_UNUSED const char **ext) {
+char *helper_get_theme_path(const char *file, G_GNUC_UNUSED const char **ext,
+                            G_GNUC_UNUSED const char *parent_file) {
   return g_strdup(file);
 }
 void rofi_add_error_message(G_GNUC_UNUSED GString *msg) {}

test/scrollbar-test.c

@@ -77,7 +77,8 @@ cairo_surface_t *rofi_icon_fetcher_get(G_GNUC_UNUSED const uint32_t uid) {
 
 int monitor_active(G_GNUC_UNUSED workarea *mon) { return 0; }
 
-char *helper_get_theme_path(const char *file, G_GNUC_UNUSED const char **ext) {
+char *helper_get_theme_path(const char *file, G_GNUC_UNUSED const char **ext,
+                            G_GNUC_UNUSED const char *parent_file) {
   return g_strdup(file);
 }
 gboolean config_parse_set_property(G_GNUC_UNUSED const Property *p,