//
//  Copyright (c) 2012 Stefan Bolte <portix@gmx.net>
//
//  This program is free software; you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation; either version 3 of the License, or
//  (at your option) any later version.
//  
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//  
//  You should have received a copy of the GNU General Public License along
//  with this program; if not, write to the Free Software Foundation, Inc.,
//  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//


/*
 * Per domain settings extension
 *
 * This extensions can be used for per-domain-settings. Valid settings are
 * the properties of WebKitWebSettings but in camelcase, see 
 * http://webkitgtk.org/reference/webkitgtk/unstable/WebKitWebSettings.html
 * for details. 
 *
 * To use this extension load it with a userscript in 
 * $HOME/.config/dwb/userscripts/, e.g. 
 *
 * ------------------------------------------------------------------------------
 * |#!javascript                                                                | 
 * |                                                                            | 
 * |extensions.load("perdomainsettings");                                       | 
 * ------------------------------------------------------------------------------
 *
 * The config can consist of four objects, 
 *
 * domains:   Settings applied based on the second level domain
 *
 * hosts:     Settings applied based on the hostname
 *
 * uris:      Settings applied based on the uri
 *
 * defaults:  Default settings, for each setting in domains, hosts and uris a
 *              default-value should be specified
 *
 * Example extensionrc: 
 *
 * ------------------------------------------------------------------------------
 * |return {                                                                    |
 * |   foo : { ... },                                                           |
 * |                                                                            |
 * |   perdomainsettings : {                                                    |
 * |     domains : {                                                            |
 * |        "example.com" : {                                                   |
 * |             "enablePlugins"  : true                                        |
 * |        },                                                                  |
 * |        "example.uk.com" :  {                                               |
 * |             "enablePlugins"  : true,                                       |
 * |             "enableScripts"  : false                                       |
 * |        }                                                                   |
 * |     },                                                                     |
 * |     hosts : {                                                              |
 * |        "www.example1.com" :  {                                             |
 * |             "autoLoadImages" : true                                        |
 * |        }                                                                   |
 * |     },                                                                     |
 * |     uris : {                                                               |
 * |        "http://www.example2.com/login.php" :  {                            |
 * |             "autoLoadImages" : false                                       |
 * |        }                                                                   |
 * |     },                                                                     |
 * |     defaults : {                                                           |
 * |        "enablePlugins"   : false,                                          |
 * |        "autoLoadImages"  : false,                                          |
 * |        "enableScripts"   :  true                                           |
 * |     }                                                                      |
 * |   },                                                                       |
 * |                                                                            |
 * |   bar : { ... }                                                            |
 * |}                                                                           |
 * ------------------------------------------------------------------------------
 *
 * Example using extensions.load: 
 *
 * ------------------------------------------------------------------------------
 * |extensions.load("perdomainsettings", {                                      |
 * |  domains : { "example.com" : { "enablePlugins" : true }  },                |
 * |  defaults : { "enablePlugins" : false }                                    |
 * |});                                                                         |
 * ------------------------------------------------------------------------------
 *
 * */ 

var me = "perdomainsettings";
var domains = null;
var hosts = null;
var uris = null;
var defaults = null;
var webviews = [];
var sigNavigation = -1;
var sigCloseTab = -1;

var defaultConfig = {
//<DEFAULT_CONFIG
  // Settings applied based on the second level domain, e.g.
  // domains : { "example.com" : { autoLoadImages : true } }, 
  domains : {},

  //Settings applied based on the hostname
  // hosts : { "www.example.com" : { autoLoadImages : true } }, 
  hosts : {},

  // Settings applied based on the uri
  // uris : { "http://www.example.com/foo/" : { autoLoadImages : true } }, 
  uris : {},

  // Default settings, for each setting in domains, hosts and uris a
  // default-value should be specified, e.g.
  // uris : { autoLoadImages : false }, 
  defaults : {}

//>DEFAULT_CONFIG
};

function apply(o, settings) {
  var key;
  var defaults = true;
  var websettings = o.settings;
  for (key in settings) {
    if (!o.set[key]) {
      websettings[key] = settings[key];
      o.set[key] = true;
    }
    else {
      defaults = false;
    }
  }
  return defaults;
}

function onNavigation(wv, frame, request, action) {
  var length = webviews.length; 
  var i, host, domain;
  var found = false;
  var o = null;
  for (i=0; i<length && o === null; i++) {
    if (webviews[i].webview === wv) {
      o = webviews[i];
    }
  }
  if (o === null) {
    o = { webview : wv, defaults : false, settings : wv.settings };
    webviews.push(o);
  }
  o.set = {};
  if (frame === wv.mainFrame) {
    try {
      var uri = request.uri;
      host = request.message.uri.host;
      domain = util.domainFromHost(host);
      if (domains[domain]) {
        apply(o, domains[domain]);
        o.defaults = false;
      }
      if (hosts[host]) {
        apply(o, hosts[host]);
        o.defaults = false;
      }
      if (uris[uri]) {
        apply(o, uris[uri]);
        o.defaults = false;
      }
      if (o.defaults === false && apply(o, defaults)) {
        o.defaults = true;
      }
    }
    catch (e) {
      extensions.error(me, e);
    }
  }
}
function onCloseTab(wv) {
  var i;
  for (i=0; i<webviews.length; i++) {
    if (webviews[i].webview === wv) {
      webviews.splice(i, 1);
      return;
    }
  }
}

return {
  init : function (config) {
    if (!config) {
      extensions.error(me, "Missing config");
      return false;
    }
    domains = config.domains || defaultConfig.domains;
    hosts = config.hosts || defaultConfig.hosts;
    uris = config.uris || defaultConfig.uris;
    defaults = config.defaults || defaultConfig.defaults;
    sigNavigation = signals.connect("navigation", onNavigation);
    sigCloseTab = signals.connect("closeTab", onCloseTab);
    return true;
  },
  end : function () {
    if (sigNavigation >= 0) {
      signals.disconnect(sigNavigation);
      sigNavigation = -1;
    }
    if (sigCloseTab >= 0) {
      signals.disconnect(sigCloseTab);
      sigCloseTab = -1;
    }
  }
};

// vim: set ft=javascript: