Add displays management

[Anahkiasen]

I have two screens and I constantly switch the main one because I also use one of the two for the PC. Would love to have a command like m displays switch or something that switches screen, like when dragging the bar here from one screen to another:

[rgcr]

That's a great idea 👍

[pbnj]

This can potentially be accomplished by doing a defaults write to modify the appropriate attribute(s) in com.apple.windowserver.plist.

I just don't have a secondary monitor to test/compare the settings when one monitor is the primary vs when the other monitor is the primary.

For instance, here is my output from reading the Displays Preferences (currently using the built-in macbook display only):

$ defaults read /Library/Preferences/com.apple.windowserver.plist
{
    DisplayResolutionEnabled = 1;
    DisplaySets =     (
                (
                        {
                Active = 1;
                Depth = 4;
                DisplayID = 69731456;
                DisplayProductID = 40978;
                DisplaySerialNumber = 0;
                DisplayVendorID = 1552;
                Height = 1080;
                IODisplayLocation = "IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/P0P2@1/IOPCI2PCIBridge/GFX0@0/NVDA,Display-A@0/NVDA";
                IOFlags = 7;
                LimitsHeight = 1080;
                LimitsOriginX = 0;
                LimitsOriginY = 0;
                LimitsWidth = 1920;
                MirrorID = 0;
                Mirrored = 0;
                Mode =                 {
                    BitsPerPixel = 32;
                    BitsPerSample = 8;
                    DepthFormat = 4;
                    Height = 1080;
                    IODisplayModeID = "-2147479552";
                    IOFlags = 7;
                    Mode = 1;
                    PixelEncoding = "--------RRRRRRRRGGGGGGGGBBBBBBBB";
                    RefreshRate = 0;
                    SamplesPerPixel = 3;
                    UsableForDesktopGUI = 1;
                    Width = 1920;
                    kCGDisplayBytesPerRow = 7680;
                    kCGDisplayHorizontalResolution = 103;
                    kCGDisplayModeIsInterlaced = 0;
                    kCGDisplayModeIsSafeForHardware = 1;
                    kCGDisplayModeIsStretched = 0;
                    kCGDisplayModeIsTelevisionOutput = 0;
                    kCGDisplayModeIsUnavailable = 0;
                    kCGDisplayModeSuitableForUI = 1;
                    kCGDisplayPixelsHigh = 1080;
                    kCGDisplayPixelsWide = 1920;
                    kCGDisplayResolution = 1;
                    kCGDisplayVerticalResolution = 103;
                };
                OriginX = 0;
                OriginY = 0;
                PixelEncoding = "--------RRRRRRRRGGGGGGGGBBBBBBBB";
                Resolution = 1;
                Unit = 0;
                UnmirroredHeight = 1080;
                UnmirroredLimitsHeight = 1080;
                UnmirroredLimitsOriginX = 0;
                UnmirroredLimitsOriginY = 0;
                UnmirroredLimitsWidth = 1920;
                UnmirroredMode =                 {
                    BitsPerPixel = 32;
                    BitsPerSample = 8;
                    DepthFormat = 4;
                    Height = 1080;
                    IODisplayModeID = "-2147479552";
                    IOFlags = 7;
                    Mode = 1;
                    PixelEncoding = "--------RRRRRRRRGGGGGGGGBBBBBBBB";
                    RefreshRate = 0;
                    SamplesPerPixel = 3;
                    UsableForDesktopGUI = 1;
                    Width = 1920;
                    kCGDisplayBytesPerRow = 7680;
                    kCGDisplayHorizontalResolution = 103;
                    kCGDisplayModeIsInterlaced = 0;
                    kCGDisplayModeIsSafeForHardware = 1;
                    kCGDisplayModeIsStretched = 0;
                    kCGDisplayModeIsTelevisionOutput = 0;
                    kCGDisplayModeIsUnavailable = 0;
                    kCGDisplayModeSuitableForUI = 1;
                    kCGDisplayPixelsHigh = 1080;
                    kCGDisplayPixelsWide = 1920;
                    kCGDisplayResolution = 1;
                    kCGDisplayVerticalResolution = 103;
                };
                UnmirroredOriginX = 0;
                UnmirroredOriginY = 0;
                UnmirroredResolution = 1;
                UnmirroredWidth = 1920;
                Width = 1920;
            }
        )
    );
    ForceOldStyleMemoryManagement = 0;
}

[rgcr]

@pmbenjamin, I'll test it