访问国外网站速度慢,二级医院做网站,做淘宝客为什么要做网站,网站是什么样子的一、chrome.system.display
使用 system.display API 查询展示元数据。
权限
system.display
类型
ActiveState
Chrome 117 及更高版本
用于指示系统是否检测到和使用显示屏的枚举。如果系统未检测到显示屏#xff08;可能断开连接#xff0c;或因睡眠模式等原因而被视…一、chrome.system.display
使用 system.display API 查询展示元数据。
权限
system.display
类型
ActiveState
Chrome 117 及更高版本
用于指示系统是否检测到和使用显示屏的枚举。如果系统未检测到显示屏可能断开连接或因睡眠模式等原因而被视为断开连接则显示屏将被视为“非活动状态”。例如此状态用于在所有显示屏断开连接时保留现有显示屏。
chrome.system.display | API | Chrome for Developers
二、chrome.system.display c接口定义
1、system_display.idl
extensions\common\api\system_display.idl
// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.// Use the codesystem.display/code API to query display metadata.
namespace system.display {dictionary Bounds {// The x-coordinate of the upper-left corner.long left;// The y-coordinate of the upper-left corner.long top;// The width of the display in pixels.long width;// The height of the display in pixels.long height;};dictionary Insets {// The x-axis distance from the left bound.long left;// The y-axis distance from the top bound.long top;// The x-axis distance from the right bound.long right;// The y-axis distance from the bottom bound.long bottom;};dictionary Point {// The x-coordinate of the point.long x;// The y-coordinate of the point.long y;};dictionary TouchCalibrationPair {// The coordinates of the display point.Point displayPoint;// The coordinates of the touch point corresponding to the display point.Point touchPoint;};dictionary TouchCalibrationPairQuad {// First pair of touch and display point required for touch calibration.TouchCalibrationPair pair1;// Second pair of touch and display point required for touch calibration.TouchCalibrationPair pair2;// Third pair of touch and display point required for touch calibration.TouchCalibrationPair pair3;// Fourth pair of touch and display point required for touch calibration.TouchCalibrationPair pair4;};dictionary DisplayMode {// The display mode width in device independent (user visible) pixels.long width;// The display mode height in device independent (user visible) pixels.long height;// The display mode width in native pixels.long widthInNativePixels;// The display mode height in native pixels.long heightInNativePixels;// The display mode UI scale factor.[deprecatedUse $(ref: displayZoomFactor)] double? uiScale;// The display mode device scale factor.double deviceScaleFactor;// The display mode refresh rate in hertz.double refreshRate;// True if the mode is the displays native mode.boolean isNative;// True if the display mode is currently selected.boolean isSelected;// True if this mode is interlaced, false if not provided.boolean? isInterlaced;};// Layout position, i.e. edge of parent that the display is attached to.enum LayoutPosition { top, right, bottom, left };dictionary DisplayLayout {// The unique identifier of the display.DOMString id;// The unique identifier of the parent display. Empty if this is the root.DOMString parentId;// The layout position of this display relative to the parent. This will// be ignored for the root.LayoutPosition position;// The offset of the display along the connected edge. 0 indicates that// the topmost or leftmost corners are aligned.long offset;};// EDID extracted parameters. Field description refers to VESA ENHANCED// EXTENDED DISPLAY IDENTIFICATION DATA STANDARD (Defines EDID Structure// Version 1, Revision 4) Release A, Revision 2 September 25, 2006.// https://www.vesa.org/vesa-standardsdictionary Edid {// 3 character manufacturer code. See Sec. 3.4.1 page 21. Required in v1.4.DOMString manufacturerId;// 2 byte manufacturer-assigned code, Sec. 3.4.2 page 21. Required in v1.4.DOMString productId;// Year of manufacturer, Sec. 3.4.4 page 22. Required in v1.4.long yearOfManufacture;};// An enum to tell if the display is detected and used by the// system. The display is considered inactive, if it is not// detected by the system (maybe disconnected, or considered// disconnected due to sleep mode, etc). This state is used to keep// existing display when the all displays are disconnected, for// example.enum ActiveState { active, inactive };dictionary DisplayUnitInfo {// The unique identifier of the display.DOMString id;// The user-friendly name (e.g. HP LCD monitor).DOMString name;// NOTE: This is only available to Chrome OS Kiosk apps and Web UI.Edid? edid;// Chrome OS only. Identifier of the display that is being mirrored if// mirroring is enabled, otherwise empty. This will be set for all displays// (including the display being mirrored).DOMString mirroringSourceId;// Chrome OS only. Identifiers of the displays to which the source display// is being mirrored. Empty if no displays are being mirrored. This will be// set to the same value for all displays. This must not include// |mirroringSourceId|.DOMString[] mirroringDestinationIds;// True if this is the primary display.boolean isPrimary;// True if this is an internal display.boolean isInternal;// True if this display is enabled.boolean isEnabled;// Active if the display is detected and used by the system.ActiveState activeState;// True for all displays when in unified desktop mode. See documentation// for $(ref:enableUnifiedDesktop).boolean isUnified;// True when the auto-rotation is allowed. It happens when the device is in// a tablet physical state or kSupportsClamshellAutoRotation is set.// Provided for ChromeOS Settings UI only. TODO(stevenjb): Remove when// Settings switches to a mojo API.[nodoc] boolean? isAutoRotationAllowed;// The number of pixels per inch along the x-axis.double dpiX;// The number of pixels per inch along the y-axis.double dpiY;// The displays clockwise rotation in degrees relative to the vertical// position.// Currently exposed only on ChromeOS. Will be set to 0 on other platforms.// A value of -1 will be interpreted as auto-rotate when the device is in// a physical tablet state.long rotation;// The displays logical bounds.Bounds bounds;// The displays insets within its screens bounds.// Currently exposed only on ChromeOS. Will be set to empty insets on// other platforms.Insets overscan;// The usable work area of the display within the display bounds. The work// area excludes areas of the display reserved for OS, for example taskbar// and launcher.Bounds workArea;// The list of available display modes. The current mode will have// isSelectedtrue. Only available on Chrome OS. Will be set to an empty// array on other platforms.DisplayMode[] modes;// True if this display has a touch input device associated with it.boolean hasTouchSupport;// True if this display has an accelerometer associated with it.// Provided for ChromeOS Settings UI only. TODO(stevenjb): Remove when// Settings switches to a mojo API. NOTE: The name of this may change.[nodoc] boolean hasAccelerometerSupport;// A list of zoom factor values that can be set for the display.double[] availableDisplayZoomFactors;// The ratio between the displays current and default zoom.// For example, value 1 is equivalent to 100% zoom, and value 1.5 is// equivalent to 150% zoom.double displayZoomFactor;};dictionary DisplayProperties {// Chrome OS only. If set to true, changes the display mode to unified// desktop (see $(ref:enableUnifiedDesktop) for details). If set to false,// unified desktop mode will be disabled. This is only valid for the// primary display. If provided, mirroringSourceId must not be provided and// other properties will be ignored. This is has no effect if not provided.boolean? isUnified;// Chrome OS only. If set and not empty, enables mirroring for this display// only. Otherwise disables mirroring for all displays. This value should// indicate the id of the source display to mirror, which must not be the// same as the id passed to setDisplayProperties. If set, no other property// may be set.[deprecatedUse $(ref:setMirrorMode).] DOMString? mirroringSourceId;// If set to true, makes the display primary. No-op if set to false.// Note: If set, the display is considered primary for all other properties// (i.e. $(ref:isUnified) may be set and bounds origin may not).boolean? isPrimary;// If set, sets the displays overscan insets to the provided values. Note// that overscan values may not be negative or larger than a half of the// screens size. Overscan cannot be changed on the internal monitor.Insets? overscan;// If set, updates the displays rotation.// Legal values are [0, 90, 180, 270]. The rotation is set clockwise,// relative to the displays vertical position.long? rotation;// If set, updates the displays logical bounds origin along the x-axis.// Applied together with $(ref:boundsOriginY). Defaults to the current value// if not set and $(ref:boundsOriginY) is set. Note that when updating the// display origin, some constraints will be applied, so the final bounds// origin may be different than the one set. The final bounds can be// retrieved using $(ref:getInfo). The bounds origin cannot be changed on// the primary display.long? boundsOriginX;// If set, updates the displays logical bounds origin along the y-axis.// See documentation for $(ref:boundsOriginX) parameter.long? boundsOriginY;// If set, updates the display mode to the mode matching this value.// If other parameters are invalid, this will not be applied. If the// display mode is invalid, it will not be applied and an error will be// set, but other properties will still be applied.DisplayMode? displayMode;// If set, updates the zoom associated with the display. This zoom performs// re-layout and repaint thus resulting in a better quality zoom than just// performing a pixel by pixel stretch enlargement.double? displayZoomFactor;};dictionary GetInfoFlags {// If set to true, only a single $(ref:DisplayUnitInfo) will be returned// by $(ref:getInfo) when in unified desktop mode (see// $(ref:enableUnifiedDesktop)). Defaults to false.boolean? singleUnified;};// Mirror mode, i.e. different ways of how a display is mirrored to other// displays.enum MirrorMode {// Specifies the default mode (extended or unified desktop).off,// Specifies that the default source display will be mirrored to all other// displays.normal,// Specifies that the specified source display will be mirrored to the// provided destination displays. All other connected displays will be// extended.mixed};dictionary MirrorModeInfo {// The mirror mode that should be set.MirrorMode mode;// The id of the mirroring source display. This is only valid for mixed.DOMString? mirroringSourceId;// The ids of the mirroring destination displays. This is only valid for// mixed.DOMString[]? mirroringDestinationIds;};callback DisplayInfoCallback void (DisplayUnitInfo[] displayInfo);callback DisplayLayoutCallback void (DisplayLayout[] layouts);callback SetDisplayUnitInfoCallback void();callback SetDisplayLayoutCallback void();callback NativeTouchCalibrationCallback void(boolean success);callback SetMirrorModeCallback void();interface Functions {// Requests the information for all attached display devices.// |flags|: Options affecting how the information is returned.// |callback|: The callback to invoke with the results.[supportsPromises] static void getInfo(optional GetInfoFlags flags,DisplayInfoCallback callback);// Requests the layout info for all displays.// NOTE: This is only available to Chrome OS Kiosk apps and Web UI.// |callback|: The callback to invoke with the results.[supportsPromises] static void getDisplayLayout(DisplayLayoutCallback callback);// Updates the properties for the display specified by |id|, according to// the information provided in |info|. On failure, $(ref:runtime.lastError)// will be set.// NOTE: This is only available to Chrome OS Kiosk apps and Web UI.// |id|: The displays unique identifier.// |info|: The information about display properties that should be changed.// A property will be changed only if a new value for it is specified in// |info|.// |callback|: Empty function called when the function finishes. To find out// whether the function succeeded, $(ref:runtime.lastError) should be// queried.[supportsPromises] static void setDisplayProperties(DOMString id,DisplayProperties info,optional SetDisplayUnitInfoCallback callback);// Set the layout for all displays. Any display not included will use the// default layout. If a layout would overlap or be otherwise invalid it// will be adjusted to a valid layout. After layout is resolved, an// onDisplayChanged event will be triggered.// NOTE: This is only available to Chrome OS Kiosk apps and Web UI.// |layouts|: The layout information, required for all displays except// the primary display.// |callback|: Empty function called when the function finishes. To find out// whether the function succeeded, $(ref:runtime.lastError) should be// queried.[supportsPromises] static void setDisplayLayout(DisplayLayout[] layouts,optional SetDisplayLayoutCallback callback);// Enables/disables the unified desktop feature. If enabled while mirroring// is active, the desktop mode will not change until mirroring is turned// off. Otherwise, the desktop mode will switch to unified immediately.// NOTE: This is only available to Chrome OS Kiosk apps and Web UI.// |enabled|: True if unified desktop should be enabled.static void enableUnifiedDesktop(boolean enabled);// Starts overscan calibration for a display. This will show an overlay// on the screen indicating the current overscan insets. If overscan// calibration for display |id| is in progress this will reset calibration.// |id|: The displays unique identifier.static void overscanCalibrationStart(DOMString id);// Adjusts the current overscan insets for a display. Typically this should// either move the display along an axis (e.g. leftright have the same// value) or scale it along an axis (e.g. topbottom have opposite values).// Each Adjust call is cumulative with previous calls since Start.// |id|: The displays unique identifier.// |delta|: The amount to change the overscan insets.static void overscanCalibrationAdjust(DOMString id, Insets delta);// Resets the overscan insets for a display to the last saved value (i.e// before Start was called).// |id|: The displays unique identifier.static void overscanCalibrationReset(DOMString id);// Complete overscan adjustments for a display by saving the current values// and hiding the overlay.// |id|: The displays unique identifier.static void overscanCalibrationComplete(DOMString id);// Displays the native touch calibration UX for the display with |id| as// display id. This will show an overlay on the screen with required// instructions on how to proceed. The callback will be invoked in case of// successful calibration only. If the calibration fails, this will throw an// error.// |id|: The displays unique identifier.// |callback|: Optional callback to inform the caller that the touch// calibration has ended. The argument of the callback informs if the// calibration was a success or not.[supportsPromises] static void showNativeTouchCalibration(DOMString id,optional NativeTouchCalibrationCallback callback);// Starts custom touch calibration for a display. This should be called when// using a custom UX for collecting calibration data. If another touch// calibration is already in progress this will throw an error.// |id|: The displays unique identifier.static void startCustomTouchCalibration(DOMString id);// Sets the touch calibration pairs for a display. These |pairs| would be// used to calibrate the touch screen for display with |id| called in// startCustomTouchCalibration(). Always call |startCustomTouchCalibration|// before calling this method. If another touch calibration is already in// progress this will throw an error.// |pairs|: The pairs of point used to calibrate the display.// |bounds|: Bounds of the display when the touch calibration was performed.// |bounds.left| and |bounds.top| values are ignored.static void completeCustomTouchCalibration(TouchCalibrationPairQuad pairs,Bounds bounds);// Resets the touch calibration for the display and brings it back to its// default state by clearing any touch calibration data associated with the// display.// |id|: The displays unique identifier.static void clearTouchCalibration(DOMString id);// Sets the display mode to the specified mirror mode. Each call resets the// state from previous calls. Calling setDisplayProperties() will fail for// the mirroring destination displays.// NOTE: This is only available to Chrome OS Kiosk apps and Web UI.// |info|: The information of the mirror mode that should be applied to the// display mode.// |callback|: Empty function called when the function finishes. To find out// whether the function succeeded, $(ref:runtime.lastError) should be// queried.[supportsPromises] static void setMirrorMode(MirrorModeInfo info,optional SetMirrorModeCallback callback);};interface Events {// Fired when anything changes to the display configuration.static void onDisplayChanged();};
};2、system_display.idl生成c文件
out\Debug\gen\extensions\common\api\system_display.h
out\Debug\gen\extensions\common\api\system_display.cc
3、chrome.system.display api接口定义c:
extensions\browser\api\system_display\system_display_api.h
extensions\browser\api\system_display\system_display_api.cc
namespace extensions {class SystemDisplayFunction : public ExtensionFunction {public:static const char kApiNotAvailableError[];protected:~SystemDisplayFunction() override default;bool PreRunValidation(std::string* error) override;
};class SystemDisplayCrOSRestrictedFunction : public SystemDisplayFunction {public:static const char kCrosOnlyError[];static const char kKioskOnlyError[];protected:~SystemDisplayCrOSRestrictedFunction() override default;bool PreRunValidation(std::string* error) override;// Returns true if this function should be restricted to kiosk-mode apps and// webui. The default is true.virtual bool ShouldRestrictToKioskAndWebUI();
};// This function inherits from SystemDisplayFunction because, unlike the
// rest of this API, its available on all platforms.
class SystemDisplayGetInfoFunction : public SystemDisplayFunction {public:DECLARE_EXTENSION_FUNCTION(system.display.getInfo, SYSTEM_DISPLAY_GETINFO)protected:~SystemDisplayGetInfoFunction() override default;ResponseAction Run() override;void Response(std::vectorapi::system_display::DisplayUnitInfo all_displays_info);
};class SystemDisplayGetDisplayLayoutFunction: public SystemDisplayCrOSRestrictedFunction {public:DECLARE_EXTENSION_FUNCTION(system.display.getDisplayLayout,SYSTEM_DISPLAY_GETDISPLAYLAYOUT)protected:~SystemDisplayGetDisplayLayoutFunction() override default;ResponseAction Run() override;bool ShouldRestrictToKioskAndWebUI() override;void Response(std::vectorapi::system_display::DisplayLayout display_layout);
};class SystemDisplaySetDisplayPropertiesFunction: public SystemDisplayCrOSRestrictedFunction {public:DECLARE_EXTENSION_FUNCTION(system.display.setDisplayProperties,SYSTEM_DISPLAY_SETDISPLAYPROPERTIES)protected:~SystemDisplaySetDisplayPropertiesFunction() override default;ResponseAction Run() override;void Response(std::optionalstd::string error);
};class SystemDisplaySetDisplayLayoutFunction: public SystemDisplayCrOSRestrictedFunction {public:DECLARE_EXTENSION_FUNCTION(system.display.setDisplayLayout,SYSTEM_DISPLAY_SETDISPLAYLAYOUT)protected:~SystemDisplaySetDisplayLayoutFunction() override default;ResponseAction Run() override;void Response(std::optionalstd::string error);
};class SystemDisplayEnableUnifiedDesktopFunction: public SystemDisplayCrOSRestrictedFunction {public:DECLARE_EXTENSION_FUNCTION(system.display.enableUnifiedDesktop,SYSTEM_DISPLAY_ENABLEUNIFIEDDESKTOP)protected:~SystemDisplayEnableUnifiedDesktopFunction() override default;ResponseAction Run() override;
};class SystemDisplayOverscanCalibrationStartFunction: public SystemDisplayCrOSRestrictedFunction {public:DECLARE_EXTENSION_FUNCTION(system.display.overscanCalibrationStart,SYSTEM_DISPLAY_OVERSCANCALIBRATIONSTART)protected:~SystemDisplayOverscanCalibrationStartFunction() override default;ResponseAction Run() override;
};class SystemDisplayOverscanCalibrationAdjustFunction: public SystemDisplayCrOSRestrictedFunction {public:DECLARE_EXTENSION_FUNCTION(system.display.overscanCalibrationAdjust,SYSTEM_DISPLAY_OVERSCANCALIBRATIONADJUST)protected:~SystemDisplayOverscanCalibrationAdjustFunction() override default;ResponseAction Run() override;
};class SystemDisplayOverscanCalibrationResetFunction: public SystemDisplayCrOSRestrictedFunction {public:DECLARE_EXTENSION_FUNCTION(system.display.overscanCalibrationReset,SYSTEM_DISPLAY_OVERSCANCALIBRATIONRESET)protected:~SystemDisplayOverscanCalibrationResetFunction() override default;ResponseAction Run() override;
};class SystemDisplayOverscanCalibrationCompleteFunction: public SystemDisplayCrOSRestrictedFunction {public:DECLARE_EXTENSION_FUNCTION(system.display.overscanCalibrationComplete,SYSTEM_DISPLAY_OVERSCANCALIBRATIONCOMPLETE)protected:~SystemDisplayOverscanCalibrationCompleteFunction() override default;ResponseAction Run() override;
};class SystemDisplayShowNativeTouchCalibrationFunction: public SystemDisplayCrOSRestrictedFunction {public:DECLARE_EXTENSION_FUNCTION(system.display.showNativeTouchCalibration,SYSTEM_DISPLAY_SHOWNATIVETOUCHCALIBRATION)protected:~SystemDisplayShowNativeTouchCalibrationFunction() override default;ResponseAction Run() override;void OnCalibrationComplete(std::optionalstd::string error);
};class SystemDisplayStartCustomTouchCalibrationFunction: public SystemDisplayCrOSRestrictedFunction {public:DECLARE_EXTENSION_FUNCTION(system.display.startCustomTouchCalibration,SYSTEM_DISPLAY_STARTCUSTOMTOUCHCALIBRATION)protected:~SystemDisplayStartCustomTouchCalibrationFunction() override default;ResponseAction Run() override;
};class SystemDisplayCompleteCustomTouchCalibrationFunction: public SystemDisplayCrOSRestrictedFunction {public:DECLARE_EXTENSION_FUNCTION(system.display.completeCustomTouchCalibration,SYSTEM_DISPLAY_COMPLETECUSTOMTOUCHCALIBRATION)protected:~SystemDisplayCompleteCustomTouchCalibrationFunction() override default;ResponseAction Run() override;
};class SystemDisplayClearTouchCalibrationFunction: public SystemDisplayCrOSRestrictedFunction {public:DECLARE_EXTENSION_FUNCTION(system.display.clearTouchCalibration,SYSTEM_DISPLAY_CLEARTOUCHCALIBRATION)protected:~SystemDisplayClearTouchCalibrationFunction() override default;ResponseAction Run() override;
};class SystemDisplaySetMirrorModeFunction: public SystemDisplayCrOSRestrictedFunction {public:DECLARE_EXTENSION_FUNCTION(system.display.setMirrorMode,SYSTEM_DISPLAY_SETMIRRORMODE)protected:~SystemDisplaySetMirrorModeFunction() override default;ResponseAction Run() override;void Response(std::optionalstd::string error);
};} // namespace extensions
