pad.pub0.org/static/js/broadcast_slider.js

501 lines
15 KiB
JavaScript

/**
* This code is mostly from the old Etherpad. Please help us to comment this code.
* This helps other people to understand this code better and helps them to improve it.
* TL;DR COMMENTS ON THIS FILE ARE HIGHLY APPRECIATED
*/
/**
* Copyright 2009 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS-IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
var global = this;
function loadBroadcastSliderJS()
{
(function()
{ // wrap this code in its own namespace
var sliderLength = 1000;
var sliderPos = 0;
var sliderActive = false;
var slidercallbacks = [];
var savedRevisions = [];
var sliderPlaying = false;
function disableSelection(element)
{
element.onselectstart = function()
{
return false;
};
element.unselectable = "on";
element.style.MozUserSelect = "none";
element.style.cursor = "default";
}
var _callSliderCallbacks = function(newval)
{
sliderPos = newval;
for (var i = 0; i < slidercallbacks.length; i++)
{
slidercallbacks[i](newval);
}
}
var updateSliderElements = function()
{
for (var i = 0; i < savedRevisions.length; i++)
{
var position = parseInt(savedRevisions[i].attr('pos'));
savedRevisions[i].css('left', (position * ($("#ui-slider-bar").width() - 2) / (sliderLength * 1.0)) - 1);
}
$("#ui-slider-handle").css('left', sliderPos * ($("#ui-slider-bar").width() - 2) / (sliderLength * 1.0));
}
var addSavedRevision = function(position, info)
{
var newSavedRevision = $('<div></div>');
newSavedRevision.addClass("star");
newSavedRevision.attr('pos', position);
newSavedRevision.css('position', 'absolute');
newSavedRevision.css('left', (position * ($("#ui-slider-bar").width() - 2) / (sliderLength * 1.0)) - 1);
$("#timeslider-slider").append(newSavedRevision);
newSavedRevision.mouseup(function(evt)
{
BroadcastSlider.setSliderPosition(position);
});
savedRevisions.push(newSavedRevision);
};
var removeSavedRevision = function(position)
{
var element = $("div.star [pos=" + position + "]");
savedRevisions.remove(element);
element.remove();
return element;
};
/* Begin small 'API' */
function onSlider(callback)
{
slidercallbacks.push(callback);
}
function getSliderPosition()
{
return sliderPos;
}
function setSliderPosition(newpos)
{
newpos = Number(newpos);
if (newpos < 0 || newpos > sliderLength) return;
$("#ui-slider-handle").css('left', newpos * ($("#ui-slider-bar").width() - 2) / (sliderLength * 1.0));
$("a.tlink").map(function()
{
$(this).attr('href', $(this).attr('thref').replace("%revision%", newpos));
});
$("#revision_label").html("Version " + newpos);
if (newpos == 0)
{
$("#leftstar").css('opacity', .5);
$("#leftstep").css('opacity', .5);
}
else
{
$("#leftstar").css('opacity', 1);
$("#leftstep").css('opacity', 1);
}
if (newpos == sliderLength)
{
$("#rightstar").css('opacity', .5);
$("#rightstep").css('opacity', .5);
}
else
{
$("#rightstar").css('opacity', 1);
$("#rightstep").css('opacity', 1);
}
sliderPos = newpos;
_callSliderCallbacks(newpos);
}
function getSliderLength()
{
return sliderLength;
}
function setSliderLength(newlength)
{
sliderLength = newlength;
updateSliderElements();
}
// just take over the whole slider screen with a reconnect message
function showReconnectUI()
{
if (!clientVars.sliderEnabled || !clientVars.supportsSlider)
{
$("#padmain, #rightbars").css('top', "130px");
$("#timeslider").show();
}
$('#error').show();
}
function setAuthors(authors)
{
$("#authorstable").empty();
var numAnonymous = 0;
var numNamed = 0;
authors.forEach(function(author)
{
if (author.name)
{
numNamed++;
var tr = $('<tr></tr>');
var swatchtd = $('<td></td>');
var swatch = $('<div class="swatch"></div>');
swatch.css('background-color', clientVars.colorPalette[author.colorId]);
swatchtd.append(swatch);
tr.append(swatchtd);
var nametd = $('<td></td>');
nametd.text(author.name || "unnamed");
tr.append(nametd);
$("#authorstable").append(tr);
}
else
{
numAnonymous++;
}
});
if (numAnonymous > 0)
{
var html = "<tr><td colspan=\"2\" style=\"color:#999; padding-left: 10px\">" + (numNamed > 0 ? "...and " : "") + numAnonymous + " unnamed author" + (numAnonymous > 1 ? "s" : "") + "</td></tr>";
$("#authorstable").append($(html));
}
if (authors.length == 0)
{
$("#authorstable").append($("<tr><td colspan=\"2\" style=\"color:#999; padding-left: 10px\">No Authors</td></tr>"))
}
}
global.BroadcastSlider = {
onSlider: onSlider,
getSliderPosition: getSliderPosition,
setSliderPosition: setSliderPosition,
getSliderLength: getSliderLength,
setSliderLength: setSliderLength,
isSliderActive: function()
{
return sliderActive;
},
playpause: playpause,
addSavedRevision: addSavedRevision,
showReconnectUI: showReconnectUI,
setAuthors: setAuthors
}
function playButtonUpdater()
{
if (sliderPlaying)
{
if (getSliderPosition() + 1 > sliderLength)
{
$("#playpause_button_icon").toggleClass('pause');
sliderPlaying = false;
return;
}
setSliderPosition(getSliderPosition() + 1);
setTimeout(playButtonUpdater, 100);
}
}
function playpause()
{
$("#playpause_button_icon").toggleClass('pause');
if (!sliderPlaying)
{
if (getSliderPosition() == sliderLength) setSliderPosition(0);
sliderPlaying = true;
playButtonUpdater();
}
else
{
sliderPlaying = false;
}
}
// assign event handlers to html UI elements after page load
//$(window).load(function ()
fireWhenAllScriptsAreLoaded.push(function()
{
disableSelection($("#playpause_button")[0]);
disableSelection($("#timeslider")[0]);
if (clientVars.sliderEnabled && clientVars.supportsSlider)
{
$(document).keyup(function(e)
{
var code = -1;
if (!e) var e = window.event;
if (e.keyCode) code = e.keyCode;
else if (e.which) code = e.which;
if (code == 37)
{ // left
if (!e.shiftKey)
{
setSliderPosition(getSliderPosition() - 1);
}
else
{
var nextStar = 0; // default to first revision in document
for (var i = 0; i < savedRevisions.length; i++)
{
var pos = parseInt(savedRevisions[i].attr('pos'));
if (pos < getSliderPosition() && nextStar < pos) nextStar = pos;
}
setSliderPosition(nextStar);
}
}
else if (code == 39)
{
if (!e.shiftKey)
{
setSliderPosition(getSliderPosition() + 1);
}
else
{
var nextStar = sliderLength; // default to last revision in document
for (var i = 0; i < savedRevisions.length; i++)
{
var pos = parseInt(savedRevisions[i].attr('pos'));
if (pos > getSliderPosition() && nextStar > pos) nextStar = pos;
}
setSliderPosition(nextStar);
}
}
else if (code == 32) playpause();
});
}
$(window).resize(function()
{
updateSliderElements();
});
$("#ui-slider-bar").mousedown(function(evt)
{
setSliderPosition(Math.floor((evt.clientX - $("#ui-slider-bar").offset().left) * sliderLength / 742));
$("#ui-slider-handle").css('left', (evt.clientX - $("#ui-slider-bar").offset().left));
$("#ui-slider-handle").trigger(evt);
});
// Slider dragging
$("#ui-slider-handle").mousedown(function(evt)
{
this.startLoc = evt.clientX;
this.currentLoc = parseInt($(this).css('left'));
var self = this;
sliderActive = true;
$(document).mousemove(function(evt2)
{
$(self).css('pointer', 'move')
var newloc = self.currentLoc + (evt2.clientX - self.startLoc);
if (newloc < 0) newloc = 0;
if (newloc > ($("#ui-slider-bar").width() - 2)) newloc = ($("#ui-slider-bar").width() - 2);
$("#revision_label").html("Version " + Math.floor(newloc * sliderLength / ($("#ui-slider-bar").width() - 2)));
$(self).css('left', newloc);
if (getSliderPosition() != Math.floor(newloc * sliderLength / ($("#ui-slider-bar").width() - 2))) _callSliderCallbacks(Math.floor(newloc * sliderLength / ($("#ui-slider-bar").width() - 2)))
});
$(document).mouseup(function(evt2)
{
$(document).unbind('mousemove');
$(document).unbind('mouseup');
sliderActive = false;
var newloc = self.currentLoc + (evt2.clientX - self.startLoc);
if (newloc < 0) newloc = 0;
if (newloc > ($("#ui-slider-bar").width() - 2)) newloc = ($("#ui-slider-bar").width() - 2);
$(self).css('left', newloc);
// if(getSliderPosition() != Math.floor(newloc * sliderLength / ($("#ui-slider-bar").width()-2)))
setSliderPosition(Math.floor(newloc * sliderLength / ($("#ui-slider-bar").width() - 2)))
self.currentLoc = parseInt($(self).css('left'));
});
})
// play/pause toggling
$("#playpause_button").mousedown(function(evt)
{
var self = this;
$(self).css('background-image', 'url(/static/img/crushed_button_depressed.png)');
$(self).mouseup(function(evt2)
{
$(self).css('background-image', 'url(/static/img/crushed_button_undepressed.png)');
$(self).unbind('mouseup');
BroadcastSlider.playpause();
});
$(document).mouseup(function(evt2)
{
$(self).css('background-image', 'url(/static/img/crushed_button_undepressed.png)');
$(document).unbind('mouseup');
});
});
// next/prev saved revision and changeset
$('.stepper').mousedown(function(evt)
{
var self = this;
var origcss = $(self).css('background-position');
if (!origcss)
{
origcss = $(self).css('background-position-x') + " " + $(self).css('background-position-y');
}
var origpos = parseInt(origcss.split(" ")[1]);
var newpos = (origpos - 43);
if (newpos < 0) newpos += 87;
var newcss = (origcss.split(" ")[0] + " " + newpos + "px");
if ($(self).css('opacity') != 1.0) newcss = origcss;
$(self).css('background-position', newcss)
$(self).mouseup(function(evt2)
{
$(self).css('background-position', origcss);
$(self).unbind('mouseup');
$(document).unbind('mouseup');
if ($(self).attr("id") == ("leftstep"))
{
setSliderPosition(getSliderPosition() - 1);
}
else if ($(self).attr("id") == ("rightstep"))
{
setSliderPosition(getSliderPosition() + 1);
}
else if ($(self).attr("id") == ("leftstar"))
{
var nextStar = 0; // default to first revision in document
for (var i = 0; i < savedRevisions.length; i++)
{
var pos = parseInt(savedRevisions[i].attr('pos'));
if (pos < getSliderPosition() && nextStar < pos) nextStar = pos;
}
setSliderPosition(nextStar);
}
else if ($(self).attr("id") == ("rightstar"))
{
var nextStar = sliderLength; // default to last revision in document
for (var i = 0; i < savedRevisions.length; i++)
{
var pos = parseInt(savedRevisions[i].attr('pos'));
if (pos > getSliderPosition() && nextStar > pos) nextStar = pos;
}
setSliderPosition(nextStar);
}
});
$(document).mouseup(function(evt2)
{
$(self).css('background-position', origcss);
$(self).unbind('mouseup');
$(document).unbind('mouseup');
});
})
if (clientVars)
{
if (clientVars.fullWidth)
{
$("#padpage").css('width', '100%');
$("#revision").css('position', "absolute")
$("#revision").css('right', "20px")
$("#revision").css('top', "20px")
$("#padmain").css('left', '0px');
$("#padmain").css('right', '197px');
$("#padmain").css('width', 'auto');
$("#rightbars").css('right', '7px');
$("#rightbars").css('margin-right', '0px');
$("#timeslider").css('width', 'auto');
}
if (clientVars.disableRightBar)
{
$("#rightbars").css('display', 'none');
$('#padmain').css('width', 'auto');
if (clientVars.fullWidth) $("#padmain").css('right', '7px');
else $("#padmain").css('width', '860px');
$("#revision").css('position', "absolute");
$("#revision").css('right', "20px");
$("#revision").css('top', "20px");
}
if (clientVars.sliderEnabled)
{
if (clientVars.supportsSlider)
{
$("#padmain, #rightbars").css('top', "130px");
$("#timeslider").show();
setSliderLength(clientVars.totalRevs);
setSliderPosition(clientVars.revNum);
clientVars.savedRevisions.forEach(function(revision)
{
addSavedRevision(revision.revNum, revision);
})
}
else
{
// slider is not supported
$("#padmain, #rightbars").css('top', "130px");
$("#timeslider").show();
$("#error").html("The timeslider feature is not supported on this pad. <a href=\"/ep/about/faq#disabledslider\">Why not?</a>");
$("#error").show();
}
}
else
{
if (clientVars.supportsSlider)
{
setSliderLength(clientVars.totalRevs);
setSliderPosition(clientVars.revNum);
}
}
}
});
})();
BroadcastSlider.onSlider(function(loc)
{
$("#viewlatest").html(loc == BroadcastSlider.getSliderLength() ? "Viewing latest content" : "View latest content");
})
}
exports.loadBroadcastSliderJS = loadBroadcastSliderJS;