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ferret/pkg/stdlib/html/navigate_forward.go
2019-09-07 14:03:17 -04:00

60 lines
1.5 KiB
Go

package html
import (
"context"
"github.com/MontFerret/ferret/pkg/drivers"
"github.com/MontFerret/ferret/pkg/runtime/core"
"github.com/MontFerret/ferret/pkg/runtime/values"
"github.com/MontFerret/ferret/pkg/runtime/values/types"
)
// NAVIGATE_FORWARD navigates a given page forward within its navigation history.
// The operation blocks the execution until the page gets loaded.
// If the history is empty, the function returns FALSE.
// @param page (HTMLPage) - Target page.
// @param entry (Int, optional) - Optional value indicating how many pages to skip. Default 1.
// @param timeout (Int, optional) - Optional timeout. Default is 5000.
// @returns (Boolean) - Returns TRUE if history exists and the operation succeeded, otherwise FALSE.
func NavigateForward(ctx context.Context, args ...core.Value) (core.Value, error) {
err := core.ValidateArgs(args, 1, 3)
if err != nil {
return values.False, err
}
page, err := drivers.ToPage(args[0])
if err != nil {
return values.None, err
}
skip := values.NewInt(1)
timeout := values.NewInt(drivers.DefaultWaitTimeout)
if len(args) > 1 {
err = core.ValidateType(args[1], types.Int)
if err != nil {
return values.None, err
}
skip = args[1].(values.Int)
}
if len(args) > 2 {
err = core.ValidateType(args[2], types.Int)
if err != nil {
return values.None, err
}
timeout = args[2].(values.Int)
}
ctx, fn := waitTimeout(ctx, timeout)
defer fn()
return page.NavigateForward(ctx, skip)
}