chromedp/cdp/headlessexperimental/headlessexperimental.go

// Package headlessexperimental provides the Chrome Debugging Protocol
// commands, types, and events for the HeadlessExperimental domain.
//
// This domain provides experimental commands only supported in headless
// mode.
//
// Generated by the chromedp-gen command.
package headlessexperimental

// Code generated by chromedp-gen. DO NOT EDIT.

import (
	"context"
	"encoding/base64"

	cdp "github.com/knq/chromedp/cdp"
	"github.com/knq/chromedp/cdp/runtime"
)

// EnableParams enables headless events for the target.
type EnableParams struct{}

// Enable enables headless events for the target.
func Enable() *EnableParams {
	return &EnableParams{}
}

// Do executes HeadlessExperimental.enable against the provided context and
// target handler.
func (p *EnableParams) Do(ctxt context.Context, h cdp.Handler) (err error) {
	return h.Execute(ctxt, cdp.CommandHeadlessExperimentalEnable, nil, nil)
}

// DisableParams disables headless events for the target.
type DisableParams struct{}

// Disable disables headless events for the target.
func Disable() *DisableParams {
	return &DisableParams{}
}

// Do executes HeadlessExperimental.disable against the provided context and
// target handler.
func (p *DisableParams) Do(ctxt context.Context, h cdp.Handler) (err error) {
	return h.Execute(ctxt, cdp.CommandHeadlessExperimentalDisable, nil, nil)
}

// BeginFrameParams sends a BeginFrame to the target and returns when the
// frame was completed. Optionally captures a screenshot from the resulting
// frame. Requires that the target was created with enabled BeginFrameControl.
type BeginFrameParams struct {
	FrameTime  *runtime.Timestamp `json:"frameTime,omitempty"`  // Timestamp of this BeginFrame (milliseconds since epoch). If not set, the current time will be used.
	Deadline   *runtime.Timestamp `json:"deadline,omitempty"`   // Deadline of this BeginFrame (milliseconds since epoch). If not set, the deadline will be calculated from the frameTime and interval.
	Interval   float64            `json:"interval,omitempty"`   // The interval between BeginFrames that is reported to the compositor, in milliseconds. Defaults to a 60 frames/second interval, i.e. about 16.666 milliseconds.
	Screenshot *ScreenshotParams  `json:"screenshot,omitempty"` // If set, a screenshot of the frame will be captured and returned in the response. Otherwise, no screenshot will be captured.
}

// BeginFrame sends a BeginFrame to the target and returns when the frame was
// completed. Optionally captures a screenshot from the resulting frame.
// Requires that the target was created with enabled BeginFrameControl.
//
// parameters:
func BeginFrame() *BeginFrameParams {
	return &BeginFrameParams{}
}

// WithFrameTime timestamp of this BeginFrame (milliseconds since epoch). If
// not set, the current time will be used.
func (p BeginFrameParams) WithFrameTime(frameTime *runtime.Timestamp) *BeginFrameParams {
	p.FrameTime = frameTime
	return &p
}

// WithDeadline deadline of this BeginFrame (milliseconds since epoch). If
// not set, the deadline will be calculated from the frameTime and interval.
func (p BeginFrameParams) WithDeadline(deadline *runtime.Timestamp) *BeginFrameParams {
	p.Deadline = deadline
	return &p
}

// WithInterval the interval between BeginFrames that is reported to the
// compositor, in milliseconds. Defaults to a 60 frames/second interval, i.e.
// about 16.666 milliseconds.
func (p BeginFrameParams) WithInterval(interval float64) *BeginFrameParams {
	p.Interval = interval
	return &p
}

// WithScreenshot if set, a screenshot of the frame will be captured and
// returned in the response. Otherwise, no screenshot will be captured.
func (p BeginFrameParams) WithScreenshot(screenshot *ScreenshotParams) *BeginFrameParams {
	p.Screenshot = screenshot
	return &p
}

// BeginFrameReturns return values.
type BeginFrameReturns struct {
	HasDamage               bool   `json:"hasDamage,omitempty"`               // Whether the BeginFrame resulted in damage and, thus, a new frame was committed to the display.
	MainFrameContentUpdated bool   `json:"mainFrameContentUpdated,omitempty"` // Whether the main frame submitted a new display frame in response to this BeginFrame.
	ScreenshotData          string `json:"screenshotData,omitempty"`          // Base64-encoded image data of the screenshot, if one was requested and successfully taken.
}

// Do executes HeadlessExperimental.beginFrame against the provided context and
// target handler.
//
// returns:
//   hasDamage - Whether the BeginFrame resulted in damage and, thus, a new frame was committed to the display.
//   mainFrameContentUpdated - Whether the main frame submitted a new display frame in response to this BeginFrame.
//   screenshotData - Base64-encoded image data of the screenshot, if one was requested and successfully taken.
func (p *BeginFrameParams) Do(ctxt context.Context, h cdp.Handler) (hasDamage bool, mainFrameContentUpdated bool, screenshotData []byte, err error) {
	// execute
	var res BeginFrameReturns
	err = h.Execute(ctxt, cdp.CommandHeadlessExperimentalBeginFrame, p, &res)
	if err != nil {
		return false, false, nil, err
	}

	// decode
	var dec []byte
	dec, err = base64.StdEncoding.DecodeString(res.ScreenshotData)
	if err != nil {
		return false, false, nil, err
	}
	return res.HasDamage, res.MainFrameContentUpdated, dec, nil
}