boards/static/js/main.js

/*
 @licstart  The following is the entire license notice for the
 JavaScript code in this page.


 Copyright (C) 2013  neko259

 The JavaScript code in this page is free software: you can
 redistribute it and/or modify it under the terms of the GNU
 General Public License (GNU GPL) as published by the Free Software
 Foundation, either version 3 of the License, or (at your option)
 any later version.  The code is distributed WITHOUT ANY WARRANTY;
 without even the implied warranty of MERCHANTABILITY or FITNESS
 FOR A PARTICULAR PURPOSE.  See the GNU GPL for more details.

 As additional permission under GNU GPL version 3 section 7, you
 may distribute non-source (e.g., minimized or compacted) forms of
 that code without the copy of the GNU GPL normally required by
 section 4, provided you include this license notice and a URL
 through which recipients can access the Corresponding Source.

 @licend  The above is the entire license notice
 for the JavaScript code in this page.
 */

var ITEM_VOLUME_LEVEL = 'volumeLevel';
var IMAGE_TYPES = ['image/png', 'image/jpg', 'image/jpeg', 'image/bmp', 'image/gif'];

/**
 * An email is a hidden file to prevent spam bots from posting. It has to be
 * hidden.
 */
function hideEmailFromForm() {
    $('.form-email').parent().parent().hide();
}

/**
 * Highlight code blocks with code highlighter
 */
function highlightCode(node) {
    node.find('pre code').each(function(i, e) {
        hljs.highlightBlock(e);
    });
}

function updateFavPosts(data) {
    var includePostBody = $('#fav-panel').is(":visible");

    var allNewPostCount = 0;

    if (includePostBody) {
        var favoriteThreadPanel = $('#fav-panel');
        favoriteThreadPanel.empty();
    }

    $.each($.parseJSON(data), function (_, dict) {
        var newPostCount = dict.new_post_count;
        allNewPostCount += newPostCount;

        if (includePostBody) {
            var favThreadNode = $('<div class="post"></div>');
            favThreadNode.append($(dict.post_url));
            favThreadNode.append(' ');
            favThreadNode.append($('<span class="title">' + dict.title + '</span>'));

            if (newPostCount > 0) {
                favThreadNode.append(' (<a href="' + dict.newest_post_link + '">+' + newPostCount + "</a>)");
            }

            favoriteThreadPanel.append(favThreadNode);

            addRefLinkPreview(favThreadNode[0]);
        }
    });

    var newPostCountNode = $('#new-fav-post-count');
    if (allNewPostCount > 0) {
        newPostCountNode.text('(+' + allNewPostCount + ')');
        newPostCountNode.show();
    } else {
        newPostCountNode.hide();
    }
}

function initFavPanel() {
    var favPanelButton = $('#fav-panel-btn');
    if (favPanelButton.length > 0 && typeof SharedWorker != 'undefined') {
        var worker = new SharedWorker($('body').attr('data-update-script'));
        worker.port.onmessage = function(e) {
            updateFavPosts(e.data);
        };
        worker.onerror = function(event){
            throw new Error(event.message + " (" + event.filename + ":" + event.lineno + ")");
        };
        worker.port.start();

        $(favPanelButton).click(function() {
            var favPanel = $('#fav-panel');
            favPanel.toggle();

            worker.port.postMessage({ includePostBody: favPanel.is(':visible')});

            return false;
        });

        $(document).on('keyup.removepic', function(e) {
            if(e.which === 27) {
                $('#fav-panel').hide();
            }
        });
    }
}

function setVolumeLevel(level) {
    localStorage.setItem(ITEM_VOLUME_LEVEL, level);
}

function getVolumeLevel() {
    var level = localStorage.getItem(ITEM_VOLUME_LEVEL);
    if (level == null) {
        level = 1.0;
    }
    return level
}

function processVolumeUser(node) {
    if (!window.localStorage) return;
    node.prop("volume", getVolumeLevel());
    node.on('volumechange', function(event) {
        setVolumeLevel(event.target.volume);
        $("video,audio").prop("volume", getVolumeLevel());
    });
}

/**
 * Add all scripts than need to work on post, when the post is added to the
 * document.
 */
function addScriptsToPost(post) {
    addRefLinkPreview(post[0]);
    highlightCode(post);
    processVolumeUser(post.find("video,audio"));
}

/**
 * Fix compatibility issues with some rare browsers
 */
function compatibilityCrutches() {
    if (window.operamini) {
        $('#form textarea').each(function() { this.placeholder = ''; });
    }
}

function addContextMenu() {
    $.contextMenu({
        selector: '.file-menu',
        trigger: 'left',

        build: function($trigger, e) {
            var fileSearchUrl = $trigger.data('search-url');
            var isImage = IMAGE_TYPES.indexOf($trigger.data('type')) > -1;
            var hasUrl = fileSearchUrl.length > 0;
            return {
                items: {
                    duplicates: {
                        name: gettext('Duplicates search'),
                        callback: function(key, opts) {
                            window.location = '/feed/?image=' + $trigger.data('filename');
                        }
                    },
                    google: {
                        name: 'Google',
                        visible: isImage && hasUrl,
                        callback: function(key, opts) {
                            window.location = 'https://www.google.com/searchbyimage?image_url=' + fileSearchUrl;
                        }
                    },
                    iqdb: {
                        name: 'IQDB',
                        visible: isImage && hasUrl,
                        callback: function(key, opts) {
                            window.location = 'http://iqdb.org/?url=' + fileSearchUrl;
                        }
                    },
                    tineye: {
                        name: 'TinEye',
                        visible: isImage && hasUrl,
                        callback: function(key, opts) {
                            window.location = 'http://tineye.com/search?url=' + fileSearchUrl;
                        }
                    }
                },
            };
        }
    });
}

$( document ).ready(function() {
    hideEmailFromForm();

    $("a[href='#top']").click(function() {
        $("html, body").animate({ scrollTop: 0 }, "slow");
        return false;
    });

    addImgPreview();

    addRefLinkPreview();

    highlightCode($(document));

    initFavPanel();

    var volumeUsers = $("video,audio");
    processVolumeUser(volumeUsers);

    addContextMenu();

    compatibilityCrutches();
});