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more inspector features; image preview

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Brandon Liu
2021-12-29 15:57:42 +08:00
parent fd1f5eeb39
commit 9ad5bbf28c
1 changed files with 56 additions and 20 deletions
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76
examples/inspector.html
View File

@@ -5,26 +5,58 @@
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1">
<script src="https://d3js.org/d3.v7.min.js"></script>
<link rel="stylesheet" href="https://unpkg.com/tachyons@4.12.0/css/tachyons.min.css"/>
<script src="https://unpkg.com/pmtiles@latest/index.js"></script>
<!-- <script src="../js/index.js"></script> -->
<title>PMTiles inspector</title>
<style>
#drop_zone {
border: 5px solid blue;
width: 200px;
height: 100px;
}
</style>
</head>
<body>
<div id="drop_zone" ondrop="dropHandler(event);" ondragover="dragOverHandler(event);">
<p>Drag a PMTiles file into this Drop Zone...</p>
<body class="sans-serif v-scroll bg-dark-gray flex">
<div class="w-50 vh-100 bg-light-gray pa4 flex flex-column">
<div class="f4 w-100" ondrop="dropHandler(event);" ondragover="dragOverHandler(event);">
<div class=" f4 fw5 dark-gray b--dark-gray ba4 b--dotted bw1 pa3">Drag and drop a local PMTiles file here...</div>
<div class="pv3">
<div class="flex">
<input placeholder="PMTiles file url (not yet implemented)" class="flex-grow-1"/>
<button class="ml3 link bg-white dim ba pointer">Inspect</button>
</div>
</div>
</div>
<div class="fw5 f6 mt2">spec version: <span id="spec_version">?</span></div>
<div class="fw5 f6 mt2">metadata length: <span id="metadata_length">?</span></div>
<div id="metadata" class="f6"></div>
<div class="overflow-y-scroll flex-grow-1 f6 mt2">
<table class="w-100">
<thead class="tl">
<tr>
<th>z</th>
<th>x</th>
<th>y</th>
<th>offset</th>
<th>length</th>
<th>dir</th>
</tr>
</thead>
<tbody id="root_entries">
</tbody>
</table>
</div>
<div class="f6 mt2"><span id="root_entries_count">?</span> root entries</div>
</div>
<div class="w-50 flex items-center justify-center">
<div>
<div id="preview_label" class="white mb2"></div>
<img id="preview"></img>
</div>
</div>
<div id="header"></div>
<div id="metadata"></div>
<div id="root_entries"></div>
</body>
<script>
function loadEntry(file,row) {
var blob = file.slice(row[3],row[3]+row[4]);
var imageUrl = window.URL.createObjectURL(blob);
d3.select("#preview_label").text(`${row[0]} ${row[1]} ${row[2]}`);
let preview = d3.select("#preview").attr("src",imageUrl);
}
function dropHandler(ev) {
ev.preventDefault();
var data = ev.dataTransfer.items;
@@ -33,17 +65,21 @@
blob.arrayBuffer().then(a => {
var header = pmtiles.parseHeader(new DataView(a,0,10));
let dec = new TextDecoder("utf-8")
let metadata = dec.decode(new DataView(a,10,header.json_size));
d3.select("#header").text(`pmtiles spec version: ${header.version} metadata len: ${header.json_size} root entries: ${header.root_entries}`)
d3.select("#metadata").text(metadata)
let metadata = JSON.parse(dec.decode(new DataView(a,10,header.json_size)));
d3.select("#spec_version").text(header.version);
d3.select("#metadata_length").text(header.json_size);
d3.select("#root_entries_count").text(header.root_entries);
d3.select("#metadata").selectAll("div")
.data(Object.entries(metadata).map(a => `${a[0]}: ${a[1]}`))
.enter().append("div").text(d => d);
var entries_view = new DataView(a,10+header.json_size,17*header.root_entries);
let entries = []
for (var i = 0; i < entries_view.byteLength; i+=17) {
var [z,x,y,offset,length,is_dir] = pmtiles.parseEntry(entries_view,i);
entries.push({z:z,x:x,y:y,offset:offset,length:length,is_dir:is_dir})
entries.push(pmtiles.parseEntry(entries_view,i));
}
let row = d3.select("#root_entries").selectAll("div").data(entries).enter().append("div")
row.text(d => { return `${d.z} ${d.x} ${d.y}` })
let row = d3.select("#root_entries").selectAll("tr").data(entries).enter().append("tr")
.attr("class","f6 pv1 dim pointer").on("click", (ev,d) => { loadEntry(file, d); });
row.selectAll("td").data(d => d).enter().append("td").text(d => d);
})
}
function dragOverHandler(ev) {