Ask for password if file is encrypted

callbacks.c

@@ -220,3 +220,52 @@ cb_file_monitor(GFileMonitor* monitor, GFile* file, GFile* UNUSED(other_file), G
 
   sc_reload(session, NULL, NULL, 0);
 }
+
+bool
+cb_password_dialog(GtkEntry* entry, zathura_password_dialog_info_t* dialog)
+{
+  if (entry == NULL || dialog == NULL) {
+    goto error_ret;
+  }
+
+  if (dialog->path == NULL) {
+    free(dialog);
+    goto error_ret;
+  }
+
+  if (dialog->zathura == NULL) {
+    goto error_free;
+  }
+
+  char* input = gtk_editable_get_chars(GTK_EDITABLE(entry), 0, -1);
+
+  /* no or empty password: ask again */
+  if (input == NULL || strlen(input) == 0) {
+    if (input != NULL) {
+      g_free(input);
+    }
+
+    girara_dialog(dialog->zathura->ui.session, "Enter password:", true, NULL,
+        (girara_callback_inputbar_activate_t) cb_password_dialog, dialog);
+
+    return false;
+  }
+
+  /* try to open document again */
+  document_open(dialog->zathura, dialog->path, input);
+
+  g_free(input);
+  g_free(dialog->path);
+  free(dialog);
+
+  return true;
+
+error_free:
+
+    g_free(dialog->path);
+    free(dialog);
+
+error_ret:
+
+  return false;
+}

callbacks.h

@@ -78,4 +78,13 @@ bool cb_sc_follow(GtkEntry* entry, girara_session_t* session);
 void cb_file_monitor(GFileMonitor* monitor, GFile* file, GFile* other_file,
     GFileMonitorEvent event, girara_session_t* session);
 
+/**
+ * Callback to read new password for file that should be opened
+ *
+ * @param entry The password entry
+ * @param dialog The dialog information
+ * @return true if input has been handled
+ */
+bool cb_password_dialog(GtkEntry* entry, zathura_password_dialog_info_t* dialog);
+
 #endif // CALLBACKS_H

document.c

@@ -28,6 +28,7 @@
 #include <girara/datastructures.h>
 #include <girara/utils.h>
 #include <girara/statusbar.h>
+#include <girara/session.h>
 
 /**
  * Register document plugin
@@ -262,6 +263,36 @@ zathura_document_open(zathura_t* zathura, const char* path, const char* password
   document->scale               = 1.0;
   document->zathura             = zathura;
 
+  /* open document */
+  if (plugin->open_function == NULL) {
+    girara_error("plugin has no open function\n");
+    goto error_free;
+  }
+
+  zathura_plugin_error_t error = plugin->open_function(document);
+  if (error != ZATHURA_PLUGIN_ERROR_OK) {
+    while (error == ZATHURA_PLUGIN_ERROR_INVALID_PASSWORD) {
+      zathura_password_dialog_info_t* password_dialog_info = malloc(sizeof(zathura_password_dialog_info_t));
+      if (password_dialog_info != NULL) {
+        password_dialog_info->path    = g_strdup(path);
+        password_dialog_info->zathura = zathura;
+
+        if (path != NULL) {
+          girara_dialog(zathura->ui.session, "Enter password:", true, NULL,
+              (girara_callback_inputbar_activate_t) cb_password_dialog, password_dialog_info);
+          goto error_free;
+        } else {
+          free(password_dialog_info);
+        }
+      }
+      goto error_free;
+    }
+
+    girara_error("could not open document\n");
+    goto error_free;
+  }
+
+  /* read history file */
   int offset = 0;
   zathura_db_get_fileinfo(zathura->database, document->file_path,
       &document->current_page_number, &offset, &document->scale);
@@ -276,11 +307,6 @@ zathura_document_open(zathura_t* zathura, const char* path, const char* password
     document->current_page_number = 1;
   }
 
-  if (plugin->open_function == NULL || plugin->open_function(document) != ZATHURA_PLUGIN_ERROR_OK) {
-    girara_error("could not open file\n");
-    goto error_free;
-  }
-
   /* update statusbar */
   girara_statusbar_item_set_text(zathura->ui.session, zathura->ui.statusbar.file, real_path);
 

document.h

@@ -67,6 +67,12 @@ typedef enum zathura_document_meta_e
   ZATHURA_DOCUMENT_MODIFICATION_DATE /**< Modification data */
 } zathura_document_meta_t;
 
+typedef struct zathura_password_dialog_info_s
+{
+  char* path; /**< Path to the file */
+  zathura_t* zathura;  /**< Zathura session */
+} zathura_password_dialog_info_t;
+
 /**
  * Function prototype that is called to register a document plugin
  *

shortcuts.c

@@ -147,7 +147,7 @@ sc_follow(girara_session_t* session, girara_argument_t* UNUSED(argument),
 
   /* ask for input */
   if (show_links == true) {
-    girara_dialog(zathura->ui.session, "Follow link:", FALSE, NULL, (girara_callback_inputbar_activate_t) cb_sc_follow);
+    girara_dialog(zathura->ui.session, "Follow link:", FALSE, NULL, (girara_callback_inputbar_activate_t) cb_sc_follow, NULL);
   }
 
   return false;