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poc.shift.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>PoC for value shifting</title>
<script type="text/javascript" src="deps/jquery-1.11.3.js"></script>
<script type="text/javascript">
var DrawingTuringMachine = function (element) {
var values = [];
var count_positions = 10;
var offset = 100;
var width_one_number = 60;
var width_main_number = 185;
var onInitializedCallbacks = [];
var onMovementFinishedCallbacks = [];
var onSpeedUpdateCallbacks = [];
var onWriteFinishedCallbacks = [];
var runningOperation = false;
var speed = 2000;
var getTapeWidth = function () {
return (element.clientWidth || 700);
};
var getCurrentTapeValues = function (count) {
if (values.length === 0)
for (var i = 0; i < 200; i++)
values.push((Math.random() >= 0.5) ? 1 : 0);
var selection = [];
for (var i = 0; i < count; i++)
selection.push(values[offset + i - parseInt(count / 2)]);
if (selection.length !== count)
throw new Error("Bug: Size of selected elements invalid");
return selection;
};
var countPositions = function () {
var number_elements = parseInt((getTapeWidth() - width_main_number) /
width_one_number) + 1;
// left and right needs space for new-occuring element on shift
number_elements -= 2;
if (number_elements < 3)
number_elements = 3;
if (number_elements % 2 === 0)
number_elements -= 1;
return number_elements;
};
var setToolTip = function () {
var vals = getCurrentTapeValues(21);
vals[parseInt(vals.length / 2)] = "*" + vals[parseInt(vals.length / 2)] + "*";
vals = vals.map(function (v) { return "" + v; });
element.setAttribute("title", vals.join(","));
};
var rebuildValues = function () {
var numbers = $(element).find(".tm_value");
var mid = parseInt(numbers.length / 2);
numbers.each(function () {
var copy = $(this).clone(false);
copy.removeClass("animated_left");
copy.removeClass("animated_right");
copy.css("opacity", 1);
$(this).before(copy);
$(this).remove();
});
};
var assignSemanticalClasses = function () {
var numbers = $(".tm_value");
var mid = parseInt(numbers.length / 2);
var i = 0;
var semanticalClasses = ['lleft', 'rleft', 'mid', 'lright',
'rright', 'left', 'right'];
// reset classes
numbers.each(function () {
for (var c in semanticalClasses) {
var cls = semanticalClasses[c];
$(this).removeClass("tm_value_" + cls);
}
});
numbers.each(function () {
if (i === 0)
$(numbers[i]).addClass("tm_value_lleft");
else if (i === mid - 1)
$(numbers[i]).addClass("tm_value_rleft");
else if (i === mid)
$(numbers[i]).addClass("tm_value_mid");
else if (i === mid + 1)
$(numbers[i]).addClass("tm_value_lright");
else if (i === numbers.length - 1)
$(numbers[i]).addClass("tm_value_rright");
if (i < mid)
$(numbers[i]).addClass("tm_value_left");
else if (i > mid)
$(numbers[i]).addClass("tm_value_right");
i++;
});
};
var addEventListener = function (evt, callback) {
if (evt === 'initialized') {
onInitializedCallbacks.push(callback);
} else if (evt === 'movementFinished') {
onMovementFinishedCallbacks.push(callback);
} else if (evt === 'speedUpdated') {
onSpeedUpdateCallbacks.push(callback);
} else if (evt === 'writeFinished') {
onWriteFinishedCallbacks.push(callback);
} else {
throw new Error("Unknown event " + evt);
}
}
var moveFinished = function (newValue, direction) {
// recreate DOM element to make next animation possible
rebuildValues();
// assign semantic CSS classes such as lleft
assignSemanticalClasses();
// trigger callback
var visibleValues = getCurrentTapeValues(count_positions);
for (var i in onMovementFinishedCallbacks) {
onMovementFinishedCallbacks[i](visibleValues, newValue, direction);
}
runningOperation = false;
};
var initialize = function () {
runningOperation = true;
count_positions = countPositions();
var vals = getCurrentTapeValues(count_positions);
var mid = parseInt(vals.length / 2);
// create numbers
for (var i = 0; i < vals.length; i++) {
var elem = $("<div></div>").addClass("tm_value").text(vals[i]);
$(element).find(".tm_numbers").append(elem);
}
// assign CSS classes
assignSemanticalClasses();
// define left padding
var computedWidth = width_one_number * (count_positions - 1) + width_main_number;
var actualWidth = getTapeWidth();
var diff = actualWidth - computedWidth;
$(".tm_numbers").css("padding-left", parseInt(diff / 2) + "px");
for (var i in onInitializedCallbacks) {
onInitializedCallbacks[i](vals, speed);
}
setToolTip();
runningOperation = false;
};
var goLeft = function () {
if (runningOperation) {
console.warn("Already working");
return;
}
runningOperation = true;
offset += 1;
setToolTip();
var newValues = getCurrentTapeValues(count_positions);
var newRightValue = newValues[newValues.length - 1];
// insert element from right
$(element).find(".tm_value_rright").removeClass("tm_value_rright");
var elem = $("<div></div>").addClass("tm_value").addClass("tm_value_rright")
.css("opacity", "0").css("right", "0px").text(newRightValue);
$(element).find(".tm_numbers").append(elem);
// add animated-CSS-class to trigger animation
var elem = $(element).find(".tm_value");
elem.addClass("animated_left");
elem.css("animation-duration", "" + speed + "ms");
elem.each(function () {
var isRright = $(this).hasClass("tm_value_rright");
var isLleft = $(this).hasClass("tm_value_lleft");
$(this)[0].addEventListener("animationend", function () {
$(this).removeClass("animated_left");
// disallow most-right element to switch back to invisibility
if (isRright) {
$(this).css("opacity", 1);
}
// delete most-left element
if (isLleft) {
$(this).remove();
moveFinished(newRightValue, 'left');
}
}, true);
});
};
var goRight = function () {
if (runningOperation) {
console.warn("Already working");
return;
}
runningOperation = true;
offset -= 1;
setToolTip();
var newValues = getCurrentTapeValues(count_positions);
var newLeftValue = newValues[0];
// reduce left-padding to get space for new element
var numbers = $(element).find(".tm_numbers");
var oldPadding = parseInt(numbers.css("padding-left"));
if (!isNaN(oldPadding)) {
var newPadding = (oldPadding - width_one_number);
numbers.css("padding-left", newPadding + "px");
}
// insert element from left
$(element).find(".tm_value_lleft").removeClass("tm_value_lleft");
var elem = $("<div></div>").addClass("tm_value").addClass("tm_value_lleft")
.css("opacity", "0").css("left", "0px").text(newLeftValue);
$(element).find(".tm_numbers").prepend(elem);
// add animated-CSS-class to trigger animation
var elem = $(element).find(".tm_value");
elem.addClass("animated_right");
elem.css("animation-duration", "" + speed + "ms");
elem.each(function () {
var isLleft = $(this).hasClass("tm_value_lleft");
var isRright = $(this).hasClass("tm_value_rright");
$(this)[0].addEventListener("animationend", function () {
$(this).removeClass("animated_right");
// reset padding-left to old value (only one time)
if (isLleft)
numbers.css("padding-left", oldPadding);
// disallow most-left element to switch back to invisibility
if (isLleft)
$(this).css("opacity", 1);
// delete most-right element
if (isRright) {
$(this).remove();
moveFinished(newLeftValue, 'right');
}
}, true);
});
};
var writeValue = function (val) {
if (runningOperation) {
console.warn("Already working");
return;
}
var mid = parseInt($(".tm_value").length / 2);
var writingValue = function () {
values[offset] = val;
if (val)
$(".tm_value:eq(" + mid + ")").text(val);
};
var iShallRunThisAnimation = (speed >= 1000);
var halftime = parseInt(speed / 4);
if (iShallRunThisAnimation) {
var animationSpeed = parseInt(speed / 2);
$(element).find(".tm_writer").css("animation-duration", animationSpeed + "ms");
runningOperation = true;
$(element).find(".tm_writer").addClass("animated_writer");
setTimeout(writingValue, halftime);
$(element).find(".tm_writer")[0].addEventListener("animationend",
function () {
$(this).removeClass("animated_writer");
runningOperation = false;
for (var i in onWriteFinishedCallbacks) {
onWriteFinishedCallbacks[i]($(".tm_value:eq(" + mid + ")").text(), val);
}
}, true);
} else {
writingValue();
for (var i in onWriteFinishedCallbacks)
onWriteFinishedCallbacks[i]($(".tm_value:eq(" + mid + ")").text(), val);
}
};
var speedUp = function () {
if (speed <= 200)
return;
speed -= 100;
for (var i in onSpeedUpdateCallbacks) {
onSpeedUpdateCallbacks[i](speed);
}
};
var speedDown = function () {
speed += 100;
for (var i in onSpeedUpdateCallbacks) {
onSpeedUpdateCallbacks[i](speed);
}
};
return {
getCurrentTapeValues : getCurrentTapeValues,
initialize : initialize,
setToolTip : setToolTip,
goLeft : goLeft,
goRight : goRight,
writeValue : writeValue,
speedUp : speedUp,
speedDown : speedDown,
// @callback movementFinished(visible values, newly value of last movement, movement direction)
// @callback initialized(visible values)
// @callback speedUpdated(speed in microseconds)
// @callback writeFinished(old value, new value)
addEventListener : addEventListener
};
};
$(document).ready(function () {
var tm = new DrawingTuringMachine(document.querySelector("#tm_drawings"));
tm.addEventListener('initialized', function (vals, speed) {
console.log("Initialized finished. Values are:");
console.debug(vals);
$("#speed_info").val(speed + " ms");
});
tm.addEventListener('movementFinished', function (vals, val, mov) {
console.log("Finished movement to the " + mov + ". Created value " + val);
console.debug(vals);
});
tm.addEventListener('speedUpdated', function (speed) {
console.debug("Speed got updated to " + speed + " ms");
$("#speed_info").val(speed + " ms");
})
tm.addEventListener('writeFinished', function (old_value, new_value) {
console.debug("I overwrote value " + old_value + " with " + new_value);
});
tm.initialize();
goLeft = tm.goLeft;
goRight = tm.goRight;
writeValue = tm.writeValue;
goFaster = tm.speedUp;
goSlower = tm.speedDown;
});
</script>
<style type="text/css">
body { background-color: #CEE2BF; }
img { padding: 0; margin: 0; }
#tm_drawings { z-index: 40; width: 100%; height: 150px; padding: 0; margin: 0; background-color: #ACA; }
#tm_drawings .tm_tape { z-index: 41; height: 65px; position: relative; top: 30px; background-color: #DED; overflow: visible; text-align: center; }
#tm_drawings .tm_cursor { z-index: 45; position: relative; top: -27px; width: 300px; height: 150px; }
#tm_drawings .tm_writer { z-index: 42; position: relative; top: -50px; left: calc(50% - 15px); width: 30px; height: 8px; background-color: #353; border-radius: 2px; }
#tm_drawings .tm_numbers { z-index: 43; position: relative; top: -20px; }
#tm_drawings .tm_numbers .tm_value { z-index: 44; text-align: center; float: left; width: 60px; top: -10px; font-size: 30px; }
/* lleft, left, rleft, mid, lright, right, rright */
#tm_drawings .tm_numbers .tm_value_mid { width: 185px; font-size: 40px; position: relative; top: -6px; }
.animated_left.tm_value { animation: moveleft 2s ease-in-out 0s 1 normal; }
.animated_left.tm_value_mid { animation: shrinkleft 2s ease-in-out 0s 1 normal; }
.animated_left.tm_value_lright { animation: growleft 2s ease-in-out 0s 1 normal; }
.animated_left.tm_value_lleft { animation: fadeoutleft 2s ease 0s 1 normal; }
.animated_left.tm_value_rright { animation: fadeinleft 2s ease 0s 1 normal; }
.animated_right.tm_value { animation: moveright 2s ease-in-out 0s 1 normal; }
.animated_right.tm_value_mid { animation: shrinkright 2s ease-in-out 0s 1 normal; }
.animated_right.tm_value_rleft { animation: growright 2s ease-in-out 0s 1 normal; }
.animated_right.tm_value_rright { animation: fadeoutright 2s ease 0s 1 normal; }
.animated_right.tm_value_lleft { animation: fadeinright 2s ease 0s 1 normal; }
.animated_writer { animation: write 1s linear 0s 1 normal; }
@keyframes moveleft {
to { transform: translate(-60px, 0); }
}
@keyframes shrinkleft {
from { }
/* BUG. 122px must be font-size dependent. Use em instead */
to { transform: translate(-122px, 6px); font-size: 30px; }
}
@keyframes growleft {
from { }
/* BUG. 122px must be font-size dependent. Use em instead */
to { transform: translate(-122px, -6px); font-size: 40px; }
}
@keyframes fadeoutleft {
from { opacity: 1; }
to { transform: translate(-60px, 0); opacity: 0; }
}
@keyframes fadeinleft {
from { opacity: 0; }
to { transform: translate(-60px, 0); opacity: 1; }
}
@keyframes moveright {
to { transform: translate(60px, 0); }
}
@keyframes shrinkright {
from { }
/* BUG. 122px must be font-size dependent. Use em instead */
to { transform: translate(122px, 6px); font-size: 30px; }
}
@keyframes growright {
from { }
/* BUG. 122px must be font-size dependent. Use em instead */
to { transform: translate(122px, -6px); font-size: 40px; }
}
@keyframes fadeoutright {
from { opacity: 1; }
to { transform: translate(60px, 0); opacity: 0; }
}
@keyframes fadeinright {
from { opacity: 0; }
to { transform: translate(60px, 0); opacity: 1; }
}
@keyframes write {
0% { transform: translateY(0px); }
50% { transform: translateY(-60px); }
100% { transform: translateY(0px); }
}
</style>
</head>
<body>
<div class="marker" style="z-index: 200; position: absolute; top: 54px; left: 144px; border: 3px solid red; width: 20px; height: 30px"> </div>
<div class="marker" style="z-index: 200; position: absolute; top: 54px; left: calc(50% - 122px - 12px); border: 3px solid red; width: 20px; height: 30px"> </div>
<div class="marker" style="z-index: 200; position: absolute; top: 54px; left: calc(50% - 12px); border: 3px solid red; width: 20px; height: 30px"> </div>
<div class="marker" style="z-index: 200; position: absolute; top: 54px; left: calc(50% + 122px - 12px); border: 3px solid red; width: 20px; height: 30px"> </div>
<div class="marker" style="z-index: 200; position: absolute; top: 54px; right: 144px; border: 3px solid red; width: 20px; height: 30px"> </div>
<div id="tm_drawings">
<div class="tm_tape">
<img class="tm_cursor" src="static/machine.png" alt="Machine" />
<div class="tm_writer"></div>
</div>
<div class="tm_numbers"></div>
</div>
<div style="clear: both; margin-top: 50px"> </div>
<input type="submit" value="hide markers" onclick="javascript:$('.marker').toggle()" />
<input type="submit" value="go left" onclick="javascript:goLeft()" />
<input type="submit" value="go right" onclick="javascript:goRight()" />
<input type="submit" value="write" onclick="javascript:writeValue(9)" />
<input type="submit" value="go faster" onclick="javascript:goFaster()" />
<input type="submit" value="go slower" onclick="javascript:goSlower()" />
<input type="text" id="speed_info" readonly="true" style="float: right" value="{speed info}" />
</body>
</html>