Added clocks tool
This commit is contained in:
parent
8dc2621f87
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8
.idea/.gitignore
vendored
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.idea/.gitignore
vendored
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# Default ignored files
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/shelf/
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/workspace.xml
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# Editor-based HTTP Client requests
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/httpRequests/
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# Datasource local storage ignored files
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/dataSources/
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/dataSources.local.xml
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8
.idea/modules.xml
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8
.idea/modules.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<project version="4">
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<component name="ProjectModuleManager">
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<modules>
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<module fileurl="file://$PROJECT_DIR$/.idea/webtools.iml" filepath="$PROJECT_DIR$/.idea/webtools.iml" />
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</modules>
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</component>
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</project>
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6
.idea/vcs.xml
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.idea/vcs.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<project version="4">
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<component name="VcsDirectoryMappings">
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<mapping directory="" vcs="Git" />
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</component>
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</project>
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9
.idea/webtools.iml
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.idea/webtools.iml
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<?xml version="1.0" encoding="UTF-8"?>
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<module type="WEB_MODULE" version="4">
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<component name="Go" enabled="true" />
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<component name="NewModuleRootManager">
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<content url="file://$MODULE_DIR$" />
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<orderEntry type="inheritedJdk" />
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<orderEntry type="sourceFolder" forTests="false" />
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</component>
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</module>
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23
Makefile
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23
Makefile
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@ -0,0 +1,23 @@
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GOROOT := $(shell go env | grep GOROOT | sed -e "s/GOROOT=//g" | sed -e "s/[']//g")
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.Phony: build
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build: clean build.wasm build.site
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.Phony: clean
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clean:
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-rm -r target
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mkdir target
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.Phony: build.wasm
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build.wasm:
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mkdir target/wasm
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GOOS=js GOARCH=wasm go build -o target/wasm/clocks.wasm ./cmds/clocks
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cp $(GOROOT)/lib/wasm/wasm_exec.js target/wasm/.
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.Phony: build.site
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build.site:
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cp -r site/* target/.
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.Phony: dev
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dev: build
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( cd target ; python3 -m http.server )
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13
cmds/clocks/elems.go
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13
cmds/clocks/elems.go
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package main
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import "syscall/js"
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func findClockElements(id string) htmlElements {
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doc := js.Global().Get("document")
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rootClockElem := doc.Call("querySelector", "#"+id)
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return htmlElements{
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locationDiv: rootClockElem.Call("querySelector", ".location"),
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timeDiv: rootClockElem.Call("querySelector", ".time"),
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dateDiv: rootClockElem.Call("querySelector", ".date"),
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}
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}
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87
cmds/clocks/main.go
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87
cmds/clocks/main.go
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//go:build js
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package main
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import (
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"log"
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"time"
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_ "time/tzdata"
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)
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func main() {
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melTime, err := time.LoadLocation("Australia/Melbourne")
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if err != nil {
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log.Fatal(err)
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}
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sg, err := time.LoadLocation("Asia/Singapore")
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if err != nil {
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log.Fatal(err)
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}
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nyc, err := time.LoadLocation("America/New_York")
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if err != nil {
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log.Fatal(err)
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}
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la, err := time.LoadLocation("America/Los_Angeles")
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if err != nil {
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log.Fatal(err)
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}
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utc := time.UTC
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clocks := []clock{
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{
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name: "UTC",
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loc: utc,
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elements: findClockElements("utc"),
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},
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{
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name: "Australia/Melbourne",
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loc: melTime,
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elements: findClockElements("mel"),
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},
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{
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name: "Asia/Singapore",
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loc: sg,
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elements: findClockElements("sg"),
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},
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{
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name: "America/New_York",
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loc: nyc,
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elements: findClockElements("nyc"),
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},
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{
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name: "America/Los_Angeles",
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loc: la,
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elements: findClockElements("la"),
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},
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}
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updateClocks(clocks)
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go startClockUpdater(clocks)
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<-make(chan struct{})
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}
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func startClockUpdater(clocks []clock) {
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for range time.Tick(1 * time.Second) {
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updateClocks(clocks)
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}
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}
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func updateClocks(clocks []clock) {
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n := time.Now()
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for _, c := range clocks {
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updateClock(n, c)
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}
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}
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func updateClock(t time.Time, clk clock) {
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lt := t.In(clk.loc)
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clk.elements.locationDiv.Set("innerText", clk.name)
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clk.elements.dateDiv.Set("innerText", lt.Format("02 Jan 2006"))
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clk.elements.timeDiv.Set("innerText", lt.Format("15:04:05"))
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}
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18
cmds/clocks/models.go
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18
cmds/clocks/models.go
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package main
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import (
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"syscall/js"
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"time"
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)
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type clock struct {
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name string
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loc *time.Location
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elements htmlElements
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}
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type htmlElements struct {
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locationDiv js.Value
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timeDiv js.Value
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dateDiv js.Value
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}
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54
site/clocks/index.html
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54
site/clocks/index.html
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Clocks - Tools</title>
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<link
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rel="stylesheet"
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href="https://cdn.jsdelivr.net/npm/@picocss/pico@2/css/pico.min.css"
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>
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<link rel="stylesheet" href="style.css">
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</head>
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<body class="container">
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<header>
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<hgroup>
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<h1>Clocks</h1>
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<p>Various time zones</p>
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</hgroup>
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</header>
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<div class="grid">
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<div class="clock" id="utc">
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<div class="location"></div>
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<div class="time"></div>
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<div class="date"></div>
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</div>
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<div class="clock" id="mel">
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<div class="location"></div>
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<div class="time"></div>
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<div class="date"></div>
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</div>
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<div class="clock" id="sg">
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<div class="location"></div>
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<div class="time"></div>
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<div class="date"></div>
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</div>
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</div>
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<div class="grid">
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<div class="clock" id="nyc">
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<div class="location"></div>
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<div class="time"></div>
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<div class="date"></div>
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</div>
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<div class="clock" id="la">
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<div class="location"></div>
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<div class="time"></div>
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<div class="date"></div>
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</div>
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<div></div>
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</div>
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<script src="main.js" type="module"></script>
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</body>
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</html>
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8
site/clocks/main.js
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8
site/clocks/main.js
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import "/wasm/wasm_exec.js";
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const go = new Go();
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WebAssembly.instantiateStreaming(fetch("/wasm/clocks.wasm"), go.importObject)
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.then((result) => {
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go.run(result.instance);
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});
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13
site/clocks/style.css
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13
site/clocks/style.css
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div.clock {
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text-align: center;
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margin-block-end: 1.8rem;
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}
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div.clock div.location {
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color: rgb(175, 41, 29);
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}
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div.clock div.time {
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font-size: 200%;
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font-family: var(--pico-font-family-monospace);
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}
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<meta name="color-scheme" content="light dark">
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<title>Freelens Logo</title>
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<title>Tools</title>
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<title>Freelens Logo Creator - Tools</title>
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<link
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rel="stylesheet"
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href="https://cdn.jsdelivr.net/npm/@picocss/pico@2/css/pico.min.css"
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</header>
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<main>
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<ul>
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<li><a href="/freelens-logo/">Freelens Logo maker</a></li>
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<li><a href="/clocks/">Clocks</a></li>
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<li><a href="/freelens-logo/">Freelens Logo maker</a></li>
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</ul>
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</main>
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</body>
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54
target/clocks/index.html
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54
target/clocks/index.html
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Clocks - Tools</title>
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<link
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rel="stylesheet"
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href="https://cdn.jsdelivr.net/npm/@picocss/pico@2/css/pico.min.css"
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>
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<link rel="stylesheet" href="style.css">
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</head>
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<body class="container">
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<header>
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<hgroup>
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<h1>Clocks</h1>
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<p>Various time zones</p>
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</hgroup>
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</header>
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<div class="grid">
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<div class="clock" id="utc">
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<div class="location"></div>
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<div class="time"></div>
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<div class="date"></div>
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</div>
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<div class="clock" id="mel">
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<div class="location"></div>
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<div class="time"></div>
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<div class="date"></div>
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</div>
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<div class="clock" id="sg">
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<div class="location"></div>
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<div class="time"></div>
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<div class="date"></div>
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</div>
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</div>
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<div class="grid">
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<div class="clock" id="nyc">
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<div class="location"></div>
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<div class="time"></div>
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<div class="date"></div>
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</div>
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<div class="clock" id="la">
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<div class="location"></div>
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<div class="time"></div>
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<div class="date"></div>
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</div>
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<div></div>
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</div>
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<script src="main.js" type="module"></script>
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</body>
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</html>
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8
target/clocks/main.js
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8
target/clocks/main.js
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import "/wasm/wasm_exec.js";
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const go = new Go();
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WebAssembly.instantiateStreaming(fetch("/wasm/clocks.wasm"), go.importObject)
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.then((result) => {
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go.run(result.instance);
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});
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13
target/clocks/style.css
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13
target/clocks/style.css
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div.clock {
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text-align: center;
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margin-block-end: 1.8rem;
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}
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div.clock div.location {
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color: rgb(175, 41, 29);
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}
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div.clock div.time {
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font-size: 200%;
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font-family: var(--pico-font-family-monospace);
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}
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53
target/freelens-logo/index.html
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53
target/freelens-logo/index.html
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<meta name="color-scheme" content="light dark">
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<title>Freelens Logo Creator - Tools</title>
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<link
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rel="stylesheet"
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href="https://cdn.jsdelivr.net/npm/@picocss/pico@2/css/pico.min.css"
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>
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<style>
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canvas {
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border: 1px solid #ccc;
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display: block;
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margin-bottom: 10px;
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}
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</style>
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</head>
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<body class="container">
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<header>
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<hgroup>
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<h1>Freelens Logo Creator</h1>
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<p>Create logos for K8S clusters in Freelens</p>
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</hgroup>
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</header>
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<main class="grid">
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<div>
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<form id="logoForm">
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<input type="text" id="upperText" name="Upper" placeholder="Upper">
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<input type="text" id="lowerText" name="Lower" placeholder="Lower">
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<label>Background:
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<select id="bgColor" name="Background">
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<option value="#cd2d2d">Red</option>
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<option value="#d26800">Orange</option>
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<option value="#f39c12">Amber</option>
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<option value="#27ae60">Green</option>
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<option value="#17a094">Teal</option>
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<option value="#2980b9">Blue</option>
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<option value="#8e44ad">Purple</option>
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<option value="#7f8c8d">Gray</option>
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</select>
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</label>
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</form>
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</div>
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<div>
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<canvas id="logoCanvas" width="100" height="100"></canvas>
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<button id="downloadBtn">Download PNG</button>
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</div>
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</main>
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<script src="script.js"></script>
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</body>
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</html>
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78
target/freelens-logo/script.js
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78
target/freelens-logo/script.js
Normal file
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(function() {
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const canvas = document.getElementById('logoCanvas');
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const ctx = canvas.getContext('2d');
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const upperInput = document.getElementById('upperText');
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const lowerInput = document.getElementById('lowerText');
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const colorSelect = document.getElementById('bgColor');
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const downloadBtn = document.getElementById('downloadBtn');
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const PADDING = 15;
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const LINE_WIDTH = 2;
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function fitText(text, maxWidth, maxHeight) {
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let size = maxHeight;
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ctx.font = `bold ${size}px sans-serif`;
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while (ctx.measureText(text).width > maxWidth && size > 8) {
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size--;
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ctx.font = `bold ${size}px sans-serif`;
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}
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return size;
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}
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function draw() {
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const width = canvas.width;
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const height = canvas.height;
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ctx.clearRect(0, 0, width, height);
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ctx.fillStyle = colorSelect.value;
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ctx.fillRect(0, 0, width, height);
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const upper = upperInput.value;
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const lower = lowerInput.value;
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if (lower != "") {
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ctx.strokeStyle = 'white';
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ctx.lineWidth = LINE_WIDTH;
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const yLine = height / 2;
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ctx.beginPath();
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ctx.moveTo(PADDING, yLine);
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ctx.lineTo(width - PADDING, yLine);
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ctx.stroke();
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}
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const availableWidth = width - PADDING * 2;
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const availableHeight = height - PADDING * 2;
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const halfHeight = availableHeight / 2;
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ctx.fillStyle = 'white';
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ctx.textAlign = 'center';
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ctx.textBaseline = 'middle';
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if (lower != "") {
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let fontSize = fitText(upper, availableWidth, halfHeight);
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ctx.font = `bold ${fontSize}px sans-serif`;
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ctx.fillText(upper, width / 2, PADDING + halfHeight / 2);
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fontSize = fitText(lower, availableWidth, halfHeight);
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ctx.font = `bold ${fontSize}px sans-serif`;
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ctx.fillText(lower, width / 2, height - PADDING - halfHeight / 2 + 4);
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} else {
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let fontSize = fitText(upper, availableWidth, halfHeight);
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ctx.font = `bold ${fontSize}px sans-serif`;
|
||||
ctx.fillText(upper, width / 2, height / 2);
|
||||
}
|
||||
}
|
||||
|
||||
upperInput.addEventListener('input', draw);
|
||||
lowerInput.addEventListener('input', draw);
|
||||
colorSelect.addEventListener('change', draw);
|
||||
|
||||
downloadBtn.addEventListener('click', function() {
|
||||
const link = document.createElement('a');
|
||||
link.download = 'logo.png';
|
||||
link.href = canvas.toDataURL('image/png');
|
||||
link.click();
|
||||
});
|
||||
|
||||
draw();
|
||||
})();
|
||||
27
target/index.html
Normal file
27
target/index.html
Normal file
|
|
@ -0,0 +1,27 @@
|
|||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta charset="utf-8">
|
||||
<meta name="viewport" content="width=device-width, initial-scale=1">
|
||||
<meta name="color-scheme" content="light dark">
|
||||
<title>Tools</title>
|
||||
<link
|
||||
rel="stylesheet"
|
||||
href="https://cdn.jsdelivr.net/npm/@picocss/pico@2/css/pico.min.css"
|
||||
>
|
||||
</head>
|
||||
<body class="container">
|
||||
<header>
|
||||
<hgroup>
|
||||
<h1>Tools</h1>
|
||||
<p>Collection of online tools</p>
|
||||
</hgroup>
|
||||
</header>
|
||||
<main>
|
||||
<ul>
|
||||
<li><a href="/clocks/">Clocks</a></li>
|
||||
<li><a href="/freelens-logo/">Freelens Logo maker</a></li>
|
||||
</ul>
|
||||
</main>
|
||||
</body>
|
||||
</html>
|
||||
BIN
target/wasm/clocks.wasm
Executable file
BIN
target/wasm/clocks.wasm
Executable file
Binary file not shown.
575
target/wasm/wasm_exec.js
Normal file
575
target/wasm/wasm_exec.js
Normal file
|
|
@ -0,0 +1,575 @@
|
|||
// Copyright 2018 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.
|
||||
|
||||
"use strict";
|
||||
|
||||
(() => {
|
||||
const enosys = () => {
|
||||
const err = new Error("not implemented");
|
||||
err.code = "ENOSYS";
|
||||
return err;
|
||||
};
|
||||
|
||||
if (!globalThis.fs) {
|
||||
let outputBuf = "";
|
||||
globalThis.fs = {
|
||||
constants: { O_WRONLY: -1, O_RDWR: -1, O_CREAT: -1, O_TRUNC: -1, O_APPEND: -1, O_EXCL: -1, O_DIRECTORY: -1 }, // unused
|
||||
writeSync(fd, buf) {
|
||||
outputBuf += decoder.decode(buf);
|
||||
const nl = outputBuf.lastIndexOf("\n");
|
||||
if (nl != -1) {
|
||||
console.log(outputBuf.substring(0, nl));
|
||||
outputBuf = outputBuf.substring(nl + 1);
|
||||
}
|
||||
return buf.length;
|
||||
},
|
||||
write(fd, buf, offset, length, position, callback) {
|
||||
if (offset !== 0 || length !== buf.length || position !== null) {
|
||||
callback(enosys());
|
||||
return;
|
||||
}
|
||||
const n = this.writeSync(fd, buf);
|
||||
callback(null, n);
|
||||
},
|
||||
chmod(path, mode, callback) { callback(enosys()); },
|
||||
chown(path, uid, gid, callback) { callback(enosys()); },
|
||||
close(fd, callback) { callback(enosys()); },
|
||||
fchmod(fd, mode, callback) { callback(enosys()); },
|
||||
fchown(fd, uid, gid, callback) { callback(enosys()); },
|
||||
fstat(fd, callback) { callback(enosys()); },
|
||||
fsync(fd, callback) { callback(null); },
|
||||
ftruncate(fd, length, callback) { callback(enosys()); },
|
||||
lchown(path, uid, gid, callback) { callback(enosys()); },
|
||||
link(path, link, callback) { callback(enosys()); },
|
||||
lstat(path, callback) { callback(enosys()); },
|
||||
mkdir(path, perm, callback) { callback(enosys()); },
|
||||
open(path, flags, mode, callback) { callback(enosys()); },
|
||||
read(fd, buffer, offset, length, position, callback) { callback(enosys()); },
|
||||
readdir(path, callback) { callback(enosys()); },
|
||||
readlink(path, callback) { callback(enosys()); },
|
||||
rename(from, to, callback) { callback(enosys()); },
|
||||
rmdir(path, callback) { callback(enosys()); },
|
||||
stat(path, callback) { callback(enosys()); },
|
||||
symlink(path, link, callback) { callback(enosys()); },
|
||||
truncate(path, length, callback) { callback(enosys()); },
|
||||
unlink(path, callback) { callback(enosys()); },
|
||||
utimes(path, atime, mtime, callback) { callback(enosys()); },
|
||||
};
|
||||
}
|
||||
|
||||
if (!globalThis.process) {
|
||||
globalThis.process = {
|
||||
getuid() { return -1; },
|
||||
getgid() { return -1; },
|
||||
geteuid() { return -1; },
|
||||
getegid() { return -1; },
|
||||
getgroups() { throw enosys(); },
|
||||
pid: -1,
|
||||
ppid: -1,
|
||||
umask() { throw enosys(); },
|
||||
cwd() { throw enosys(); },
|
||||
chdir() { throw enosys(); },
|
||||
}
|
||||
}
|
||||
|
||||
if (!globalThis.path) {
|
||||
globalThis.path = {
|
||||
resolve(...pathSegments) {
|
||||
return pathSegments.join("/");
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (!globalThis.crypto) {
|
||||
throw new Error("globalThis.crypto is not available, polyfill required (crypto.getRandomValues only)");
|
||||
}
|
||||
|
||||
if (!globalThis.performance) {
|
||||
throw new Error("globalThis.performance is not available, polyfill required (performance.now only)");
|
||||
}
|
||||
|
||||
if (!globalThis.TextEncoder) {
|
||||
throw new Error("globalThis.TextEncoder is not available, polyfill required");
|
||||
}
|
||||
|
||||
if (!globalThis.TextDecoder) {
|
||||
throw new Error("globalThis.TextDecoder is not available, polyfill required");
|
||||
}
|
||||
|
||||
const encoder = new TextEncoder("utf-8");
|
||||
const decoder = new TextDecoder("utf-8");
|
||||
|
||||
globalThis.Go = class {
|
||||
constructor() {
|
||||
this.argv = ["js"];
|
||||
this.env = {};
|
||||
this.exit = (code) => {
|
||||
if (code !== 0) {
|
||||
console.warn("exit code:", code);
|
||||
}
|
||||
};
|
||||
this._exitPromise = new Promise((resolve) => {
|
||||
this._resolveExitPromise = resolve;
|
||||
});
|
||||
this._pendingEvent = null;
|
||||
this._scheduledTimeouts = new Map();
|
||||
this._nextCallbackTimeoutID = 1;
|
||||
|
||||
const setInt64 = (addr, v) => {
|
||||
this.mem.setUint32(addr + 0, v, true);
|
||||
this.mem.setUint32(addr + 4, Math.floor(v / 4294967296), true);
|
||||
}
|
||||
|
||||
const setInt32 = (addr, v) => {
|
||||
this.mem.setUint32(addr + 0, v, true);
|
||||
}
|
||||
|
||||
const getInt64 = (addr) => {
|
||||
const low = this.mem.getUint32(addr + 0, true);
|
||||
const high = this.mem.getInt32(addr + 4, true);
|
||||
return low + high * 4294967296;
|
||||
}
|
||||
|
||||
const loadValue = (addr) => {
|
||||
const f = this.mem.getFloat64(addr, true);
|
||||
if (f === 0) {
|
||||
return undefined;
|
||||
}
|
||||
if (!isNaN(f)) {
|
||||
return f;
|
||||
}
|
||||
|
||||
const id = this.mem.getUint32(addr, true);
|
||||
return this._values[id];
|
||||
}
|
||||
|
||||
const storeValue = (addr, v) => {
|
||||
const nanHead = 0x7FF80000;
|
||||
|
||||
if (typeof v === "number" && v !== 0) {
|
||||
if (isNaN(v)) {
|
||||
this.mem.setUint32(addr + 4, nanHead, true);
|
||||
this.mem.setUint32(addr, 0, true);
|
||||
return;
|
||||
}
|
||||
this.mem.setFloat64(addr, v, true);
|
||||
return;
|
||||
}
|
||||
|
||||
if (v === undefined) {
|
||||
this.mem.setFloat64(addr, 0, true);
|
||||
return;
|
||||
}
|
||||
|
||||
let id = this._ids.get(v);
|
||||
if (id === undefined) {
|
||||
id = this._idPool.pop();
|
||||
if (id === undefined) {
|
||||
id = this._values.length;
|
||||
}
|
||||
this._values[id] = v;
|
||||
this._goRefCounts[id] = 0;
|
||||
this._ids.set(v, id);
|
||||
}
|
||||
this._goRefCounts[id]++;
|
||||
let typeFlag = 0;
|
||||
switch (typeof v) {
|
||||
case "object":
|
||||
if (v !== null) {
|
||||
typeFlag = 1;
|
||||
}
|
||||
break;
|
||||
case "string":
|
||||
typeFlag = 2;
|
||||
break;
|
||||
case "symbol":
|
||||
typeFlag = 3;
|
||||
break;
|
||||
case "function":
|
||||
typeFlag = 4;
|
||||
break;
|
||||
}
|
||||
this.mem.setUint32(addr + 4, nanHead | typeFlag, true);
|
||||
this.mem.setUint32(addr, id, true);
|
||||
}
|
||||
|
||||
const loadSlice = (addr) => {
|
||||
const array = getInt64(addr + 0);
|
||||
const len = getInt64(addr + 8);
|
||||
return new Uint8Array(this._inst.exports.mem.buffer, array, len);
|
||||
}
|
||||
|
||||
const loadSliceOfValues = (addr) => {
|
||||
const array = getInt64(addr + 0);
|
||||
const len = getInt64(addr + 8);
|
||||
const a = new Array(len);
|
||||
for (let i = 0; i < len; i++) {
|
||||
a[i] = loadValue(array + i * 8);
|
||||
}
|
||||
return a;
|
||||
}
|
||||
|
||||
const loadString = (addr) => {
|
||||
const saddr = getInt64(addr + 0);
|
||||
const len = getInt64(addr + 8);
|
||||
return decoder.decode(new DataView(this._inst.exports.mem.buffer, saddr, len));
|
||||
}
|
||||
|
||||
const testCallExport = (a, b) => {
|
||||
this._inst.exports.testExport0();
|
||||
return this._inst.exports.testExport(a, b);
|
||||
}
|
||||
|
||||
const timeOrigin = Date.now() - performance.now();
|
||||
this.importObject = {
|
||||
_gotest: {
|
||||
add: (a, b) => a + b,
|
||||
callExport: testCallExport,
|
||||
},
|
||||
gojs: {
|
||||
// Go's SP does not change as long as no Go code is running. Some operations (e.g. calls, getters and setters)
|
||||
// may synchronously trigger a Go event handler. This makes Go code get executed in the middle of the imported
|
||||
// function. A goroutine can switch to a new stack if the current stack is too small (see morestack function).
|
||||
// This changes the SP, thus we have to update the SP used by the imported function.
|
||||
|
||||
// func wasmExit(code int32)
|
||||
"runtime.wasmExit": (sp) => {
|
||||
sp >>>= 0;
|
||||
const code = this.mem.getInt32(sp + 8, true);
|
||||
this.exited = true;
|
||||
delete this._inst;
|
||||
delete this._values;
|
||||
delete this._goRefCounts;
|
||||
delete this._ids;
|
||||
delete this._idPool;
|
||||
this.exit(code);
|
||||
},
|
||||
|
||||
// func wasmWrite(fd uintptr, p unsafe.Pointer, n int32)
|
||||
"runtime.wasmWrite": (sp) => {
|
||||
sp >>>= 0;
|
||||
const fd = getInt64(sp + 8);
|
||||
const p = getInt64(sp + 16);
|
||||
const n = this.mem.getInt32(sp + 24, true);
|
||||
fs.writeSync(fd, new Uint8Array(this._inst.exports.mem.buffer, p, n));
|
||||
},
|
||||
|
||||
// func resetMemoryDataView()
|
||||
"runtime.resetMemoryDataView": (sp) => {
|
||||
sp >>>= 0;
|
||||
this.mem = new DataView(this._inst.exports.mem.buffer);
|
||||
},
|
||||
|
||||
// func nanotime1() int64
|
||||
"runtime.nanotime1": (sp) => {
|
||||
sp >>>= 0;
|
||||
setInt64(sp + 8, (timeOrigin + performance.now()) * 1000000);
|
||||
},
|
||||
|
||||
// func walltime() (sec int64, nsec int32)
|
||||
"runtime.walltime": (sp) => {
|
||||
sp >>>= 0;
|
||||
const msec = (new Date).getTime();
|
||||
setInt64(sp + 8, msec / 1000);
|
||||
this.mem.setInt32(sp + 16, (msec % 1000) * 1000000, true);
|
||||
},
|
||||
|
||||
// func scheduleTimeoutEvent(delay int64) int32
|
||||
"runtime.scheduleTimeoutEvent": (sp) => {
|
||||
sp >>>= 0;
|
||||
const id = this._nextCallbackTimeoutID;
|
||||
this._nextCallbackTimeoutID++;
|
||||
this._scheduledTimeouts.set(id, setTimeout(
|
||||
() => {
|
||||
this._resume();
|
||||
while (this._scheduledTimeouts.has(id)) {
|
||||
// for some reason Go failed to register the timeout event, log and try again
|
||||
// (temporary workaround for https://github.com/golang/go/issues/28975)
|
||||
console.warn("scheduleTimeoutEvent: missed timeout event");
|
||||
this._resume();
|
||||
}
|
||||
},
|
||||
getInt64(sp + 8),
|
||||
));
|
||||
this.mem.setInt32(sp + 16, id, true);
|
||||
},
|
||||
|
||||
// func clearTimeoutEvent(id int32)
|
||||
"runtime.clearTimeoutEvent": (sp) => {
|
||||
sp >>>= 0;
|
||||
const id = this.mem.getInt32(sp + 8, true);
|
||||
clearTimeout(this._scheduledTimeouts.get(id));
|
||||
this._scheduledTimeouts.delete(id);
|
||||
},
|
||||
|
||||
// func getRandomData(r []byte)
|
||||
"runtime.getRandomData": (sp) => {
|
||||
sp >>>= 0;
|
||||
crypto.getRandomValues(loadSlice(sp + 8));
|
||||
},
|
||||
|
||||
// func finalizeRef(v ref)
|
||||
"syscall/js.finalizeRef": (sp) => {
|
||||
sp >>>= 0;
|
||||
const id = this.mem.getUint32(sp + 8, true);
|
||||
this._goRefCounts[id]--;
|
||||
if (this._goRefCounts[id] === 0) {
|
||||
const v = this._values[id];
|
||||
this._values[id] = null;
|
||||
this._ids.delete(v);
|
||||
this._idPool.push(id);
|
||||
}
|
||||
},
|
||||
|
||||
// func stringVal(value string) ref
|
||||
"syscall/js.stringVal": (sp) => {
|
||||
sp >>>= 0;
|
||||
storeValue(sp + 24, loadString(sp + 8));
|
||||
},
|
||||
|
||||
// func valueGet(v ref, p string) ref
|
||||
"syscall/js.valueGet": (sp) => {
|
||||
sp >>>= 0;
|
||||
const result = Reflect.get(loadValue(sp + 8), loadString(sp + 16));
|
||||
sp = this._inst.exports.getsp() >>> 0; // see comment above
|
||||
storeValue(sp + 32, result);
|
||||
},
|
||||
|
||||
// func valueSet(v ref, p string, x ref)
|
||||
"syscall/js.valueSet": (sp) => {
|
||||
sp >>>= 0;
|
||||
Reflect.set(loadValue(sp + 8), loadString(sp + 16), loadValue(sp + 32));
|
||||
},
|
||||
|
||||
// func valueDelete(v ref, p string)
|
||||
"syscall/js.valueDelete": (sp) => {
|
||||
sp >>>= 0;
|
||||
Reflect.deleteProperty(loadValue(sp + 8), loadString(sp + 16));
|
||||
},
|
||||
|
||||
// func valueIndex(v ref, i int) ref
|
||||
"syscall/js.valueIndex": (sp) => {
|
||||
sp >>>= 0;
|
||||
storeValue(sp + 24, Reflect.get(loadValue(sp + 8), getInt64(sp + 16)));
|
||||
},
|
||||
|
||||
// valueSetIndex(v ref, i int, x ref)
|
||||
"syscall/js.valueSetIndex": (sp) => {
|
||||
sp >>>= 0;
|
||||
Reflect.set(loadValue(sp + 8), getInt64(sp + 16), loadValue(sp + 24));
|
||||
},
|
||||
|
||||
// func valueCall(v ref, m string, args []ref) (ref, bool)
|
||||
"syscall/js.valueCall": (sp) => {
|
||||
sp >>>= 0;
|
||||
try {
|
||||
const v = loadValue(sp + 8);
|
||||
const m = Reflect.get(v, loadString(sp + 16));
|
||||
const args = loadSliceOfValues(sp + 32);
|
||||
const result = Reflect.apply(m, v, args);
|
||||
sp = this._inst.exports.getsp() >>> 0; // see comment above
|
||||
storeValue(sp + 56, result);
|
||||
this.mem.setUint8(sp + 64, 1);
|
||||
} catch (err) {
|
||||
sp = this._inst.exports.getsp() >>> 0; // see comment above
|
||||
storeValue(sp + 56, err);
|
||||
this.mem.setUint8(sp + 64, 0);
|
||||
}
|
||||
},
|
||||
|
||||
// func valueInvoke(v ref, args []ref) (ref, bool)
|
||||
"syscall/js.valueInvoke": (sp) => {
|
||||
sp >>>= 0;
|
||||
try {
|
||||
const v = loadValue(sp + 8);
|
||||
const args = loadSliceOfValues(sp + 16);
|
||||
const result = Reflect.apply(v, undefined, args);
|
||||
sp = this._inst.exports.getsp() >>> 0; // see comment above
|
||||
storeValue(sp + 40, result);
|
||||
this.mem.setUint8(sp + 48, 1);
|
||||
} catch (err) {
|
||||
sp = this._inst.exports.getsp() >>> 0; // see comment above
|
||||
storeValue(sp + 40, err);
|
||||
this.mem.setUint8(sp + 48, 0);
|
||||
}
|
||||
},
|
||||
|
||||
// func valueNew(v ref, args []ref) (ref, bool)
|
||||
"syscall/js.valueNew": (sp) => {
|
||||
sp >>>= 0;
|
||||
try {
|
||||
const v = loadValue(sp + 8);
|
||||
const args = loadSliceOfValues(sp + 16);
|
||||
const result = Reflect.construct(v, args);
|
||||
sp = this._inst.exports.getsp() >>> 0; // see comment above
|
||||
storeValue(sp + 40, result);
|
||||
this.mem.setUint8(sp + 48, 1);
|
||||
} catch (err) {
|
||||
sp = this._inst.exports.getsp() >>> 0; // see comment above
|
||||
storeValue(sp + 40, err);
|
||||
this.mem.setUint8(sp + 48, 0);
|
||||
}
|
||||
},
|
||||
|
||||
// func valueLength(v ref) int
|
||||
"syscall/js.valueLength": (sp) => {
|
||||
sp >>>= 0;
|
||||
setInt64(sp + 16, parseInt(loadValue(sp + 8).length));
|
||||
},
|
||||
|
||||
// valuePrepareString(v ref) (ref, int)
|
||||
"syscall/js.valuePrepareString": (sp) => {
|
||||
sp >>>= 0;
|
||||
const str = encoder.encode(String(loadValue(sp + 8)));
|
||||
storeValue(sp + 16, str);
|
||||
setInt64(sp + 24, str.length);
|
||||
},
|
||||
|
||||
// valueLoadString(v ref, b []byte)
|
||||
"syscall/js.valueLoadString": (sp) => {
|
||||
sp >>>= 0;
|
||||
const str = loadValue(sp + 8);
|
||||
loadSlice(sp + 16).set(str);
|
||||
},
|
||||
|
||||
// func valueInstanceOf(v ref, t ref) bool
|
||||
"syscall/js.valueInstanceOf": (sp) => {
|
||||
sp >>>= 0;
|
||||
this.mem.setUint8(sp + 24, (loadValue(sp + 8) instanceof loadValue(sp + 16)) ? 1 : 0);
|
||||
},
|
||||
|
||||
// func copyBytesToGo(dst []byte, src ref) (int, bool)
|
||||
"syscall/js.copyBytesToGo": (sp) => {
|
||||
sp >>>= 0;
|
||||
const dst = loadSlice(sp + 8);
|
||||
const src = loadValue(sp + 32);
|
||||
if (!(src instanceof Uint8Array || src instanceof Uint8ClampedArray)) {
|
||||
this.mem.setUint8(sp + 48, 0);
|
||||
return;
|
||||
}
|
||||
const toCopy = src.subarray(0, dst.length);
|
||||
dst.set(toCopy);
|
||||
setInt64(sp + 40, toCopy.length);
|
||||
this.mem.setUint8(sp + 48, 1);
|
||||
},
|
||||
|
||||
// func copyBytesToJS(dst ref, src []byte) (int, bool)
|
||||
"syscall/js.copyBytesToJS": (sp) => {
|
||||
sp >>>= 0;
|
||||
const dst = loadValue(sp + 8);
|
||||
const src = loadSlice(sp + 16);
|
||||
if (!(dst instanceof Uint8Array || dst instanceof Uint8ClampedArray)) {
|
||||
this.mem.setUint8(sp + 48, 0);
|
||||
return;
|
||||
}
|
||||
const toCopy = src.subarray(0, dst.length);
|
||||
dst.set(toCopy);
|
||||
setInt64(sp + 40, toCopy.length);
|
||||
this.mem.setUint8(sp + 48, 1);
|
||||
},
|
||||
|
||||
"debug": (value) => {
|
||||
console.log(value);
|
||||
},
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
async run(instance) {
|
||||
if (!(instance instanceof WebAssembly.Instance)) {
|
||||
throw new Error("Go.run: WebAssembly.Instance expected");
|
||||
}
|
||||
this._inst = instance;
|
||||
this.mem = new DataView(this._inst.exports.mem.buffer);
|
||||
this._values = [ // JS values that Go currently has references to, indexed by reference id
|
||||
NaN,
|
||||
0,
|
||||
null,
|
||||
true,
|
||||
false,
|
||||
globalThis,
|
||||
this,
|
||||
];
|
||||
this._goRefCounts = new Array(this._values.length).fill(Infinity); // number of references that Go has to a JS value, indexed by reference id
|
||||
this._ids = new Map([ // mapping from JS values to reference ids
|
||||
[0, 1],
|
||||
[null, 2],
|
||||
[true, 3],
|
||||
[false, 4],
|
||||
[globalThis, 5],
|
||||
[this, 6],
|
||||
]);
|
||||
this._idPool = []; // unused ids that have been garbage collected
|
||||
this.exited = false; // whether the Go program has exited
|
||||
|
||||
// Pass command line arguments and environment variables to WebAssembly by writing them to the linear memory.
|
||||
let offset = 4096;
|
||||
|
||||
const strPtr = (str) => {
|
||||
const ptr = offset;
|
||||
const bytes = encoder.encode(str + "\0");
|
||||
new Uint8Array(this.mem.buffer, offset, bytes.length).set(bytes);
|
||||
offset += bytes.length;
|
||||
if (offset % 8 !== 0) {
|
||||
offset += 8 - (offset % 8);
|
||||
}
|
||||
return ptr;
|
||||
};
|
||||
|
||||
const argc = this.argv.length;
|
||||
|
||||
const argvPtrs = [];
|
||||
this.argv.forEach((arg) => {
|
||||
argvPtrs.push(strPtr(arg));
|
||||
});
|
||||
argvPtrs.push(0);
|
||||
|
||||
const keys = Object.keys(this.env).sort();
|
||||
keys.forEach((key) => {
|
||||
argvPtrs.push(strPtr(`${key}=${this.env[key]}`));
|
||||
});
|
||||
argvPtrs.push(0);
|
||||
|
||||
const argv = offset;
|
||||
argvPtrs.forEach((ptr) => {
|
||||
this.mem.setUint32(offset, ptr, true);
|
||||
this.mem.setUint32(offset + 4, 0, true);
|
||||
offset += 8;
|
||||
});
|
||||
|
||||
// The linker guarantees global data starts from at least wasmMinDataAddr.
|
||||
// Keep in sync with cmd/link/internal/ld/data.go:wasmMinDataAddr.
|
||||
const wasmMinDataAddr = 4096 + 8192;
|
||||
if (offset >= wasmMinDataAddr) {
|
||||
throw new Error("total length of command line and environment variables exceeds limit");
|
||||
}
|
||||
|
||||
this._inst.exports.run(argc, argv);
|
||||
if (this.exited) {
|
||||
this._resolveExitPromise();
|
||||
}
|
||||
await this._exitPromise;
|
||||
}
|
||||
|
||||
_resume() {
|
||||
if (this.exited) {
|
||||
throw new Error("Go program has already exited");
|
||||
}
|
||||
this._inst.exports.resume();
|
||||
if (this.exited) {
|
||||
this._resolveExitPromise();
|
||||
}
|
||||
}
|
||||
|
||||
_makeFuncWrapper(id) {
|
||||
const go = this;
|
||||
return function () {
|
||||
const event = { id: id, this: this, args: arguments };
|
||||
go._pendingEvent = event;
|
||||
go._resume();
|
||||
return event.result;
|
||||
};
|
||||
}
|
||||
}
|
||||
})();
|
||||
Loading…
Reference in a new issue