boards/static/js/thread.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 CLOSE_BUTTON = '#form-close-button';
var REPLY_TO_MSG = '.reply-to-message';
var REPLY_TO_MSG_ID = '#reply-to-message-id';

var $html = $("html, body");

function moveCaretToEnd(el) {
        if (typeof el.selectionStart == "number") {
            el.selectionStart = el.selectionEnd = el.value.length;
        } else if (typeof el.createTextRange != "undefined") {
            el.focus();
            var range = el.createTextRange();
            range.collapse(false);
            range.select();
        }
}

function getForm() {
    return $('.post-form-w');
}

function resetFormPosition() {
    var form = getForm();
    form.insertAfter($('.thread'));

    $(CLOSE_BUTTON).hide();
    $(REPLY_TO_MSG).hide();
}

function showFormAfter(blockToInsertAfter) {
    var form = getForm();
    form.insertAfter(blockToInsertAfter);

    $(CLOSE_BUTTON).show();
    form.show();
    $(REPLY_TO_MSG_ID).text(blockToInsertAfter.attr('id'));
    $(REPLY_TO_MSG).show();
}

function addQuickReply(postId) {
    // If we click "reply" on the same post, it means "cancel"
    if (getForm().prev().attr('id') == postId) {
        resetFormPosition();
    } else {
        var blockToInsert = null;
        var textAreaJq = $('textarea');
        var postLinkRaw = '[post]' + postId + '[/post]'
        var textToAdd = '';

        if (postId != null) {
            var post = $('#' + postId);

            // If this is not OP, add reflink to the post. If there already is
            // the same reflink, don't add it again.
            if (!post.is(':first-child') && textAreaJq.val().indexOf(postLinkRaw) < 0) {
                textToAdd += postLinkRaw + '\n';
            }

            textAreaJq.val(textAreaJq.val()+ textToAdd);
            blockToInsert = post;
        } else {
            blockToInsert = $('.thread');
        }
        showFormAfter(blockToInsert);
    
        textAreaJq.focus();

        var textarea = document.getElementsByTagName('textarea')[0];
        moveCaretToEnd(textarea);
    }
}

function addQuickQuote() {
    var textAreaJq = $('textarea');

    var quoteButton = $("#quote-button");
    var postId = quoteButton.attr('data-post-id');
    if (postId != null && getForm().prev().attr('id') != postId) {
        addQuickReply(postId);
    }

    var textToAdd = '';
    var selection = window.getSelection().toString();
    if (selection.length == 0) {
        selection = quoteButton.attr('data-text');
    }
    if (selection.length > 0) {
        textToAdd += '[quote]' + selection + '[/quote]\n';
    }

    textAreaJq.val(textAreaJq.val() + textToAdd);

    textAreaJq.focus();

    var textarea = document.getElementsByTagName('textarea')[0];
    moveCaretToEnd(textarea);
}

function scrollToBottom() {
    $html.animate({scrollTop: $html.height()}, "fast");
}

function showQuoteButton() {
    var selection = window.getSelection().getRangeAt(0).getBoundingClientRect();
    var quoteButton = $("#quote-button");
    if (selection.width > 0) {
        // quoteButton.offset({ top: selection.top - selection.height, left: selection.left });
        quoteButton.css({top: selection.top + $(window).scrollTop() - 30, left: selection.left});
        quoteButton.show();

        var text = window.getSelection().toString();
        quoteButton.attr('data-text', text);

        var rect = window.getSelection().getRangeAt(0).getBoundingClientRect();
        var element = $(document.elementFromPoint(rect.x, rect.y));
        var postId = null;
        if (element.hasClass('post')) {
            postId = element.attr('id');
        } else {
            var postParent = element.parents('.post');
            if (postParent.length > 0) {
                postId = postParent.attr('id');
            }
        }
        quoteButton.attr('data-post-id', postId);
    } else {
        quoteButton.hide();
    }
}

$(document).ready(function() {
    $('body').on('mouseup', function() {
        showQuoteButton();
    });
    $("#quote-button").click(function() {
        addQuickQuote();
    })
});