S2OJ/web/app/controllers/map_visualizer.php
2022-03-17 12:00:03 +08:00

137 lines
4.3 KiB
PHP

<?php
if (!Auth::check()) {
becomeMsgPage(UOJLocale::get('need login'));
}
$REQUIRE_LIB['shjs'] = "";
$REQUIRE_LIB['dracula'] = "";
$REQUIRE_LIB['base64'] = "";
$REQUIRE_LIB['raphael'] = "";
echoUOJPageHeader("图可视化");
?>
<div class="container">
<div class="row">
<div class="col-md-3">
<div class="form-check">
<input class="form-check-input" type="checkbox" id="directed" name="directed">
<label class="form-check-label" for="directed">
是否有向
</label>
</div>
<div class="form-group">
<textarea class="form-control" id="edges" rows="3" placeholder="格式:
第一条边起点 第一条边终点 [第一条边权重]
第二条边起点 第二条边终点 [第二条边权重]
第三条边起点 第三条边终点 [第三条边权重]
如:
1 2
2 3
1 3 2
"></textarea>
</div>
<?php if (UOJConfig::$data['tools']['map-copy-enabled']): ?>
<button type="button" class="btn btn-secondary" id="copy">复制图片</button>
<?php endif ?>
</div>
<div class="col-md-9" id="paper">
</div>
</div>
</div>
<script>
(function () {
<?php if (UOJConfig::$data['tools']['map-copy-enabled']): ?>
$("#copy").click(function () {
if(navigator.permissions) {
navigator.permissions.query({name: "clipboard-write"}).then(result => {
if (result.state === "granted" || result.state === "prompt") {
let paper = $("#paper")
// First, we create an canvas and a img which has the same size with the canvas.
let canvas = document.createElement('canvas');
let s_img = document.createElement('img');
s_img.height = paper.height()
s_img.width = paper.width()
canvas.height = paper.height()
canvas.width = paper.width()
// After this image is loaded, we draw it on our canvas
s_img.onload = function () {
// On some browsers, the exported png have a black background.
// So we will draw a white background first.
ctx = canvas.getContext('2d');
ctx.beginPath();
ctx.rect(0, 0, paper.width(), paper.height());
ctx.fillStyle = "white";
ctx.fill();
// We put our image created from the svg to the canvas
canvas.getContext('2d').drawImage(s_img, 0, 0);
// Then we export canvas as a png file, paste it to clipboard.
canvas.toBlob(function (blob) {
const item = new ClipboardItem({[blob.type]: blob});
navigator.clipboard.write([item]).then(function () {
alert("图片已经复制到剪切板中");
}, function (err) {
alert(err);
});
});
}
// Load our svg to this image.
s_img.src = "data:image/svg+xml;base64," + Base64.encode(new XMLSerializer().serializeToString(document.querySelector("#paper > svg")));
} else {
alert("获取剪切板权限失败, 请打开网页设置并授予剪切板权限!")
}
});
} else {
alert("获取剪切板权限失败, 请使用最新Chrome浏览器, 打开网页设置并授予剪切板权限!")
}
})
<?php endif ?>
let repaint = function () {
let paper = $("#paper");
// Clear existing elements.
paper.html("");
let directed = $('#directed').is(":checked");
let Graph = Dracula.Graph;
let Renderer = Dracula.Renderer.Raphael;
let Layout = Dracula.Layout.Spring;
let graph = new Graph();
let render = function(r, n) {
let color = Raphael.getColor();
return r.set()
.push(
r.ellipse(0, 0, 30, 20).attr({stroke: color, "stroke-width": 2, fill: color, "fill-opacity": 0})
)
.push(r.text(0, 0, n.id).attr({ opacity: 1, 'font-size': 20,}));
}
$("#edges").val().split("\n").forEach(function (edge) {
if (edge.split(" ").length >= 2) {
if (edge.split(" ")[0].length !== 0 && edge.split(" ")[1].length !== 0 ){
graph.addNode(edge.split(" ")[0], {
render: render
});
graph.addNode(edge.split(" ")[1], {
render: render
});
graph.addEdge(edge.split(" ")[0], edge.split(" ")[1], {
directed: directed,
label:edge.split(" ")[2],
'label-style' : {
'font-size': 20,
"fill-opacity":"1"
}
});
}
}
})
var layout = new Layout(graph)
var renderer = new Renderer('#paper', graph, paper.width(), paper.height())
renderer.draw()
}
$("#edges").on("input", repaint)
$("#directed").on("input", repaint)
})()
</script>
<?php
echoUOJPageFooter();