doc: remove godocs.js and playground.js from core repo

These are moved to code.google.com/p/go.tools/cmd/godoc.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/12220043

doc/godocs.js

-// Copyright 2012 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-/* A little code to ease navigation of these documents.
- *
- * On window load we:
- *  + Bind search box hint placeholder show/hide events (bindSearchEvents)
- *  + Generate a table of contents (generateTOC)
- *  + Bind foldable sections (bindToggles)
- *  + Bind links to foldable sections (bindToggleLinks)
- */
-
-(function() {
-'use strict';
-
-function bindSearchEvents() {
-
-  var search = $('#search');
-  if (search.length === 0) {
-    return; // no search box
-  }
-
-  function clearInactive() {
-    if (search.is('.inactive')) {
-      search.val('');
-      search.removeClass('inactive');
-    }
-  }
-
-  function restoreInactive() {
-    if (search.val() !== '') {
-      return;
-    }
-    search.val(search.attr('placeholder'));
-    search.addClass('inactive');
-  }
-
-  search.on('focus', clearInactive);
-  search.on('blur', restoreInactive);
-
-  restoreInactive();
-}
-
-/* Generates a table of contents: looks for h2 and h3 elements and generates
- * links. "Decorates" the element with id=="nav" with this table of contents.
- */
-function generateTOC() {
-  if ($('#manual-nav').length > 0) {
-    return;
-  }
-
-  var nav = $('#nav');
-  if (nav.length === 0) {
-    return;
-  }
-
-  var toc_items = [];
-  $(nav).nextAll('h2, h3').each(function() {
-    var node = this;
-    if (node.id == '')
-      node.id = 'tmp_' + toc_items.length;
-    var link = $('<a/>').attr('href', '#' + node.id).text($(node).text());
-    var item;
-    if ($(node).is('h2')) {
-      item = $('<dt/>');
-    } else { // h3
-      item = $('<dd/>');
-    }
-    item.append(link);
-    toc_items.push(item);
-  });
-  if (toc_items.length <= 1) {
-    return;
-  }
-
-  var dl1 = $('<dl/>');
-  var dl2 = $('<dl/>');
-
-  var split_index = (toc_items.length / 2) + 1;
-  if (split_index < 8) {
-    split_index = toc_items.length;
-  }
-  for (var i = 0; i < split_index; i++) {
-    dl1.append(toc_items[i]);
-  }
-  for (/* keep using i */; i < toc_items.length; i++) {
-    dl2.append(toc_items[i]);
-  }
-
-  var tocTable = $('<table class="unruled"/>').appendTo(nav);
-  var tocBody = $('<tbody/>').appendTo(tocTable);
-  var tocRow = $('<tr/>').appendTo(tocBody);
-
-  // 1st column
-  $('<td class="first"/>').appendTo(tocRow).append(dl1);
-  // 2nd column
-  $('<td/>').appendTo(tocRow).append(dl2);
-}
-
-function bindToggle(el) {
-  $('.toggleButton', el).click(function() {
-    if ($(el).is('.toggle')) {
-      $(el).addClass('toggleVisible').removeClass('toggle');
-    } else {
-      $(el).addClass('toggle').removeClass('toggleVisible');
-    }
-  });
-}
-function bindToggles(selector) {
-  $(selector).each(function(i, el) {
-    bindToggle(el);
-  });
-}
-
-function bindToggleLink(el, prefix) {
-  $(el).click(function() {
-    var href = $(el).attr('href');
-    var i = href.indexOf('#'+prefix);
-    if (i < 0) {
-      return;
-    }
-    var id = '#' + prefix + href.slice(i+1+prefix.length);
-    if ($(id).is('.toggle')) {
-      $(id).find('.toggleButton').first().click();
-    }
-  });
-}
-function bindToggleLinks(selector, prefix) {
-  $(selector).each(function(i, el) {
-    bindToggleLink(el, prefix);
-  });
-}
-
-function setupDropdownPlayground() {
-  if (!$('#page').is('.wide')) {
-    return; // don't show on front page
-  }
-  var button = $('#playgroundButton');
-  var div = $('#playground');
-  var setup = false;
-  button.toggle(function() {
-    button.addClass('active');
-    div.show();
-    if (setup) {
-      return;
-    }
-    setup = true;
-    playground({
-      'codeEl': $('.code', div),
-      'outputEl': $('.output', div),
-      'runEl': $('.run', div),
-      'fmtEl': $('.fmt', div),
-      'shareEl': $('.share', div),
-      'shareRedirect': 'http://play.golang.org/p/'
-    });
-  },
-  function() {
-    button.removeClass('active');
-    div.hide();
-  });
-  button.show();
-  $('#menu').css('min-width', '+=60');
-}
-
-function setupInlinePlayground() {
-	'use strict';
-	// Set up playground when each element is toggled.
-	$('div.play').each(function (i, el) {
-		// Set up playground for this example.
-		var setup = function() {
-			var code = $('.code', el);
-			playground({
-				'codeEl':   code,
-				'outputEl': $('.output', el),
-				'runEl':    $('.run', el),
-				'fmtEl':    $('.fmt', el),
-				'shareEl':  $('.share', el),
-				'shareRedirect': 'http://play.golang.org/p/'
-			});
-
-			// Make the code textarea resize to fit content.
-			var resize = function() {
-				code.height(0);
-				var h = code[0].scrollHeight;
-				code.height(h+20); // minimize bouncing.
-				code.closest('.input').height(h);
-			};
-			code.on('keydown', resize);
-			code.on('keyup', resize);
-			code.keyup(); // resize now.
-		};
-		
-		// If example already visible, set up playground now.
-		if ($(el).is(':visible')) {
-			setup();
-			return;
-		}
-
-		// Otherwise, set up playground when example is expanded.
-		var built = false;
-		$(el).closest('.toggle').click(function() {
-			// Only set up once.
-			if (!built) {
-				setup();
-				built = true;
-			}
-		});
-	});
-}
-
-// fixFocus tries to put focus to div#page so that keyboard navigation works.
-function fixFocus() {
-  var page = $('div#page');
-  var topbar = $('div#topbar');
-  page.css('outline', 0); // disable outline when focused
-  page.attr('tabindex', -1); // and set tabindex so that it is focusable
-  $(window).resize(function (evt) {
-    // only focus page when the topbar is at fixed position (that is, it's in
-    // front of page, and keyboard event will go to the former by default.)
-    // by focusing page, keyboard event will go to page so that up/down arrow,
-    // space, etc. will work as expected.
-    if (topbar.css('position') == "fixed")
-      page.focus();
-  }).resize();
-}
-
-function toggleHash() {
-    var hash = $(window.location.hash);
-    if (hash.is('.toggle')) {
-      hash.find('.toggleButton').first().click();
-    }
-}
-
-function addPlusButtons() {
-  var po = document.createElement('script');
-  po.type = 'text/javascript';
-  po.async = true;
-  po.src = 'https://apis.google.com/js/plusone.js';
-  var s = document.getElementsByTagName('script')[0];
-  s.parentNode.insertBefore(po, s);
-}
-
-$(document).ready(function() {
-  bindSearchEvents();
-  generateTOC();
-  bindToggles(".toggle");
-  bindToggles(".toggleVisible");
-  bindToggleLinks(".exampleLink", "example_");
-  bindToggleLinks(".overviewLink", "");
-  bindToggleLinks(".examplesLink", "");
-  bindToggleLinks(".indexLink", "");
-  setupDropdownPlayground();
-  setupInlinePlayground();
-  fixFocus();
-  toggleHash();
-  addPlusButtons();
-
-  // godoc.html defines window.initFuncs in the <head> tag, and root.html and
-  // codewalk.js push their on-page-ready functions to the list.
-  // We execute those functions here, to avoid loading jQuery until the page
-  // content is loaded.
-  for (var i = 0; i < window.initFuncs.length; i++) window.initFuncs[i]();
-});
-
-})();