func mainPage(document dom.Document) {
js.SetTitle("Main Page")
js.SetBody(html.Div().Children(
html.H1().Id(h1Id).Text("Click Me"),
html.A().Href(paths.second).Text("Second page"),
))
h1 := document.QuerySelector(h1Id.Selector())
h1.AddEventListener("click", true, func(event dom.Event) {
js.NavigateTo(paths.second)
})
}
func snakeMove(quit chan struct{}, d dom.Document) {
// move snake: get next position
npos := nextPosition(goDir, snakeBody[0])
// check if snake eat itself
for _, pos := range snakeBody {
if pos.row == npos.row && pos.col == npos.col {
close(quit)
d.GetElementByID("info").SetTextContent("Game Over!")
return
}
}
// add next position to snake body
// FIXME: how to prepend npos to snakeBody efficiently???
var hpos []position
hpos = append(hpos, npos)
for idx, _ := range snakeBody {
hpos = append(hpos, snakeBody[idx])
}
snakeBody = hpos
sel := fmt.Sprintf("div[data-row=\"%d\"][data-col=\"%d\"]",
npos.row, npos.col)
d.QuerySelector(sel).Class().Add("select")
if foodPosition.row == npos.row && foodPosition.col == npos.col {
// snake eat food
d.QuerySelector(sel).Class().Remove("food")
// generate food
foodPosition = randomFood(snakeBody)
sel = fmt.Sprintf("div[data-row=\"%d\"][data-col=\"%d\"]",
foodPosition.row, foodPosition.col)
d.QuerySelector(sel).Class().Add("food")
} else {
// snake does not eat food
// move snake: remove last position
pos := snakeBody[len(snakeBody)-1]
snakeBody = snakeBody[:len(snakeBody)-1]
sel = fmt.Sprintf("div[data-row=\"%d\"][data-col=\"%d\"]",
pos.row, pos.col)
d.QuerySelector(sel).Class().Remove("select")
}
}