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Viewing changes to lib/lp/code/javascript/branch.revisionexpander.js

  • Committer: Colin Watson
  • Date: 2011-08-19 00:25:11 UTC
  • mfrom: (7675.1045.728 db-devel)
  • mto: This revision was merged to the branch mainline in revision 13909.
  • Revision ID: cjwatson@canonical.com-20110819002511-0x8hrqs1ckiqk53g
merge db-devel

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lib/lp/code/javascript/branch.revisionexpander.js
 
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/* Copyright 2011 Canonical Ltd.  This software is licensed under the
 
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 * GNU Affero General Public License version 3 (see the file LICENSE).
 
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 *
 
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 * Expandable branch revisions.
 
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 *
 
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 * @module lp.code.branch.revisionexpander
 
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 * @requires node, lp.client.plugins
 
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 */
 
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YUI.add('lp.code.branch.revisionexpander', function(Y) {
 
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var namespace = Y.namespace('lp.code.branch.revisionexpander');
 
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/*
 
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 * Take a single revno, or a pair of revnos specifying a revision range, and
 
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 * construct a URL to get the diff of those revnos using
 
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 * LP.cache.branch_diff_link.
 
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 */
 
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function bmp_get_diff_url(start_revno, end_revno) {
 
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    var diff_url;
 
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    if (Y.Lang.isUndefined(end_revno)) {
 
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        /* No end_revno passed, so only after a single revision diff. */
 
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        return LP.cache.branch_diff_link + start_revno;
 
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    }
 
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    diff_url = LP.cache.branch_diff_link + end_revno;
 
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    if (start_revno !== 0) {
 
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       diff_url += '/' + start_revno;
 
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    } else if (start_revno === 0 && end_revno !== 1) {
 
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       diff_url += '/null:';
 
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    }
 
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    return diff_url;
 
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}
 
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function difftext_to_node(difftext) {
 
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    var node = Y.Node.create('<table class="diff"></table>');
 
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    var difflines = difftext.split('\n');
 
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    var i;
 
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    /* Remove the empty final row caused by a trailing newline
 
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     * (if it is empty) */
 
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    if (difflines.length > 0 && difflines[difflines.length-1] === '') {
 
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        difflines.pop();
 
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    }
 
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    for (i=0; i < difflines.length; i++) {
 
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        var line = difflines[i];
 
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        var line_node = Y.Node.create('<td/>');
 
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        line_node.set('text', line + '\n');
 
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        /* Colour the unified diff */
 
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        var header_pat = /^(===|---|\+\+\+) /;
 
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        var chunk_pat = /^@@ /;
 
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        if (line.match(header_pat)) {
 
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            line_node.addClass('diff-header');
 
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        } else if (line.match(chunk_pat)) {
 
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            line_node.addClass('diff-chunk');
 
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        } else {
 
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            switch (line[0]) {
 
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                case '+':
 
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                    line_node.addClass('diff-added');
 
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                    break;
 
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                case '-':
 
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                    line_node.addClass('diff-removed');
 
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                    break;
 
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            }
 
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        }
 
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        line_node.addClass('text');
 
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        var row = Y.Node.create('<tr></tr>');
 
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        row.appendChild(line_node);
 
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        node.appendChild(row);
 
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    }
 
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    return node;
 
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}
 
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function revision_expander_config(expander){
 
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   return {
 
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        on: {
 
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            success: function nodify_result(diff) {
 
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                expander.receive(difftext_to_node(diff));
 
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            },
 
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            failure: function(trid, response, args) {
 
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                expander.receive(Y.Node.create('<pre><i>Error</i></pre>'));
 
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            }
 
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        }
 
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   };
 
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}
 
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function bmp_diff_loader(expander, lp_client) {
 
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    if (lp_client === undefined) {
 
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        lp_client = new Y.lp.client.Launchpad();
 
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    }
 
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    var rev_no_range = expander.icon_node.get(
 
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        'id').replace('expandable-', '').split('-');
 
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    var start_revno = rev_no_range[0]-1;
 
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    var end_revno = rev_no_range[1];
 
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    lp_client.get(bmp_get_diff_url(start_revno, end_revno),
 
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        revision_expander_config(expander));
 
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}
 
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namespace.bmp_diff_loader = bmp_diff_loader;
 
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namespace.difftext_to_node = difftext_to_node;
 
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namespace.bmp_get_diff_url = bmp_get_diff_url;
 
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}, "0.1", {"requires": ["node", "lp.app.widgets.expander"]});