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Photoshop 7.0 Scripting Guide

44

Scripting Photoshop

Working with units

3

3.5 Working with units

Photoshop provides two rulers for use when working on a document — a graphics ruler used
for most graphical layout measurements and a type ruler which is active when using the type
tool. The unit types for these two rulers are set using the

ruler units

(RulerUnits/rulerUnits)

and

type units (TypeUnits/typeUnits)

, respectively.

These settings correspond to those found in the Photoshop preference dialog under “Edit
>Preferences > Units & Rulers.”

The graphics ruler is used for most operations on a document where height, width, or position
are specified. The type ruler is used when operating on text items, such as when setting leading
or indent values. By changing the settings for each ruler you can work with documents in the
measurement system that make the most sense for the project at hand.

3.5.1 Unit values

Photoshop Scripting Support uses unit values for certain properties and parameters. The
comments for the Photoshop Scripting Support objects and properties will note where unit
values are used.

Because of scripting languages differences, the way you provide a unit value in a script will
depend on the language you are using. All languages support plain numbers for unit values.
Scripting Support treats these values as being of the type currently specified for the
appropriate ruler.

For example, if the ruler units are currently set to inches and the following Visual Basic
statement is executed:

docRef.ResizeImage 3,3

the document's image will be resized to 3 inches by 3 inches. If the ruler units were set to
pixels, the image would be 3 pixels by 3 pixels, which is probably not what was intended. To
ensure that your scripts produce the expected results you should check and set the ruler units to
the type appropriate for your script. After executing a script the original values of the rule
settings should be restored if changed in the script. See section

3.5.3, “Changing ruler and type

units” on page 48

for directions on setting unit values.

AppleScript unit considerations

AppleScript provides an additional way of working with unit values. You can provide values
with an explicit unit type where unit values are used. When a typed value is provided its type
overrides the ruler’s current setting.

For example, to create a document which is 4 inches wide by 5 inches high you would write:

make new document with properties {width:inches 4, ¬

height:inches 5}

Содержание 23101335 - Photoshop - PC

Страница 1: ...ADOBE SYSTEMS INCORPORATED Corporate Headquarters 345 Park Avenue San Jose CA 95110 2704 408 536 6000 http partners adobe com bbc March 2002 Photoshop 7 0 Scripting Guide...

Страница 2: ...The software described in this document is furnished under license and may only be used or copied in accordance with the terms of such license Adobe Photoshop and PostScript are either registered tra...

Страница 3: ...objects 9 2 2 Object model concepts 9 2 3 Documenting scripts 11 2 4 Values 12 2 5 Variables 14 2 6 Operators 16 2 7 Commands and methods 17 2 8 Handlers subroutines and functions 20 2 9 The Scripts m...

Страница 4: ...s 3 8 Document object 54 3 9 Layer objects 58 3 10 Text item object 64 3 11 Selections 67 3 12 Working with Filters 74 3 13 Channel object 75 3 14 Color objects 77 3 15 History object 80 3 16 Clipboar...

Страница 5: ...snippets that will not work as fully functional scripts Several conventions will be used when referring to AppleScript Visual Basic and JavaScript Please note the following shortcut notations AS stand...

Страница 6: ...th short simple scripts to save a few seconds a day and move on to more involved scripts Any repetitive task is a good candidate for a script Once you can identify the steps and conditions involved in...

Страница 7: ...asic or one of the applications that contains a Visual Basic editor Most Windows systems include the Windows Scripting Host If you do not have Windows Scripting Host or would like more information abo...

Страница 8: ...n be used to script Photoshop On Windows any language which is COM aware can be used to script Photoshop This includes languages available in Windows Scripting Host such as VBScript and JScript as wel...

Страница 9: ...ontext Here s a way to think about objects and their properties as an object model Imagine that you live in a house that responds to your commands The house is an object and its properties might inclu...

Страница 10: ...avaScript are objects contained within other objects For example rooms are elements or collections of our house contained within the house object In Photoshop documents are elements of the application...

Страница 11: ...ur description For multiple line comments start your comment with the characters and end it with this is a single line comment this is a multiple line comment Visual Basic In Visual Basic enter Rem fo...

Страница 12: ...t TABLE 2 1 AppleScript Values Value type What it is Example boolean Logical true or false true integer Whole numbers no decimal points Integers can be positive or negative 14 real A number which may...

Страница 13: ...Array A list of values Arrays contain a single value type unless the type is defined as Variant Array 10 0 20 0 30 0 40 0 Object reference A specific reference to an object appRef ActiveDocument TABLE...

Страница 14: ...pt however it is considered good form to declare all of your variables before using them To declare variables in Visual Basic use the Dim keyword To declare variables in JavaScript use the var keyword...

Страница 15: ...t reference use Set Set thisLayer appRef Photoshop ActiveDocument ArtLayers 1 If you are trying to assign a value to a variable in Visual Basic that is not an object reference do not use Set Use Visua...

Страница 16: ...returned would be 10 25 You can also use operators to perform comparisons equal to not equal to greater than or less than etc Some operators differ between AppleScript Visual Basic and JavaScript Cons...

Страница 17: ...erties and the assignment operator to retrieve and change object properties JS In JavaScript use the add method to create new objects and the assignment operator to assign both object references and v...

Страница 18: ...hotoshop documents open 2 7 2 Control structures Control structures provide for repetitive processes or loops The idea of a loop is to repeat some action with or without changes each time through the...

Страница 19: ...at until flag true set flag to button returned of display dialog Quit buttons Yes No Yes end repeat set flag to false repeat while flag false set flag to button returned of display dialog Later button...

Страница 20: ...an refer to from within your script These subroutines provide a way to re use parts of scripts Typically you send one or more values to a subroutine and it returns one or more values There s nothing s...

Страница 21: ...are in the Scripts folder 2 9 1 Scripts folder The Scripts folder is in the Photoshop Presets folder This folder is created during Scripting Support functionality installation All JavaScript files pla...

Страница 22: ...ript Debugging on page 26 for more information There is also a Browse button in the Scripts dialog When this button is clicked a file navigation dialog will be presented Use this dialog to locate and...

Страница 23: ...cript will be checked when compiled it is possible to create and compile scripts in AppleScript that will not run properly The Script Editor Application doesn t have extensive debugging tools but it d...

Страница 24: ...lay the contents of one or more variables in the log window by using the log command log myVariable otherVariable In addition the Result window choose Controls Show Result will display the value from...

Страница 25: ...next line of your script or choose Run Start or press F5 to continue normal execution of the script You can also observe the values of variables defined in your script using the Watch window a very v...

Страница 26: ...the Run Script button changes to Debug Script When invoking JavaScript from AppleScript or VB you must set the show debugger argument appropriately If you set show debugger to never you will disable...

Страница 27: ...his view changes the current scope enabling you to inspect and modify scope specific data All debugging output appears in the upper right pane of the script debugger window The currently executing Jav...

Страница 28: ...ndows Halt the currently executing script temporarily and reactivate the script debugger window This button is enabled when a script is running Stop Cmd K Mac OS Ctrl K Windows Stop execution of the s...

Страница 29: ...ield Photoshop executes the contents of the command line entry field within the stack scope of the line highlighted in the Stack Trace view The command line entry field accepts any JavaScript code mak...

Страница 30: ...avaScript code Temporary breakpoints The Script Breakpoints window provides the following controls The Line field contains the line number of the breakpoint within the scriptlet The Condition field ma...

Страница 31: ...og Found My Document on error display dialog Couldn t locate document My Document end try end tell VB Private Sub Command1_Click Store a reference to the document with the name My Document If the docu...

Страница 32: ...0 Scripting Guide 32 Scripting basics Testing and troubleshooting 2 JS try for i 0 i documents length i var myName documents i name alert myName catch someError alert JavaScript error occured Message...

Страница 33: ...s by name rather than numeric index and set the current document in your script before working on it Document numbers do not represent their stacking order See 3 4 Object references on page 42 for mor...

Страница 34: ...s JavaScript does not include an object browser 3 2 1 Viewing Photoshop s AppleScript dictionary 1 Start Photoshop then your Script Editor 2 In Script Editor choose File Open Dictionary Script Editor...

Страница 35: ...p 7 0 Object Library option from the list of available references and click the OK button If the library does not appear in the list of available references then Scripting Support is not installed pro...

Страница 36: ...peration of the script and it s good style to include them in your own scripts As you look through the script you ll see how to create then address each object The AppleScript command tell indicates t...

Страница 37: ...rt Visual Basic and create a new project Add the Adobe Photoshop 7 0 Object Library reference to the project as shown earlier If you are using a built in editor in a VBA application skip to step 4 2 A...

Страница 38: ...pRef Preferences RulerUnits psInches Create a new 4x4 inch document and assign it to a variable Dim docRef As Photoshop Document Dim artLayerRef As Photoshop ArtLayer Dim textItemRef As Photoshop Text...

Страница 39: ...e VBScript is not as strongly typed as Visual basic In Visual Basic you say Dim aRef as Photoshop ArtLayer in VBScript you say Dim aRef For VBScript simply omit the as X part VBScript does not support...

Страница 40: ...nces RulerUnits 2 Create a new 4x4 inch document and assign it to a variable Dim docRef Dim artLayerRef Dim textItemRef Set docRef appRef Documents Add 4 4 Create a new art layer containing text Set a...

Страница 41: ...lerUnits Units INCHES Create a new 4x4 inch document and assign it to a variable var docRef documents add 4 4 Create a new art layer containing text var artLayerRef docRef artLayers add artLayerRef ki...

Страница 42: ...esult of manipulating other objects For example when a new art layer is created in the document it will become the first layer and the layer that was previously the first layer is now the 2nd layer Th...

Страница 43: ...erences RulerUnits appRef Preferences RulerUnits psInches Set docRef appRef Documents Add 4 4 72 My New Document Create 2 new layers and store their return references Set layer1Ref docRef ArtLayers Ad...

Страница 44: ...ferences the way you provide a unit value in a script will depend on the language you are using All languages support plain numbers for unit values Scripting Support treats these values as being of th...

Страница 45: ...es settings are measured by ppi The length unit value types available AppleScript use are listed below The points and picas unit value types are PostScript points with 72 points per inch The tradition...

Страница 46: ...following script will result in an error set pixelValue to pixels 72 Next line will result in a coercion error when run set inchValue to pixelValue as inches 3 5 2 Unit value useage The following two...

Страница 47: ...sual Basic JavaScript crop bounds height width Document Crop Bounds Height Width document crop bounds height width resize canvas height width Document ResizeCanvas Height Width document resizeCanvas h...

Страница 48: ...ttings to postscript size In Visual Basic and JavaScript ruler units and type units are properties of the Preferences accessed through the application object s preferences property as shown below VB a...

Страница 49: ...nts parameter The parameter takes an array for you to pass any values For example save the following JavaScript in a file somewhere on your machine alert You passed arguments length arguments for i 0...

Страница 50: ...avaScript debugger at the beginning of your JavaScript When you use this option the JavaScript command debugger will stop the JavaScript and display the JavaScript debugger 3 6 2 Executing one line Ja...

Страница 51: ...et the current or active document before executing any other commands To do this use the current document ActiveDocument activeDocument property on the application object AS set docRef to current docu...

Страница 52: ...an error to the script See section 2 10 4 Error handling on page 31 for more information on catching errors Opening a document When using the open command there are a number of specifiable options Th...

Страница 53: ...ptions raw format Options RawFormatOpenOptions RawFormatOpenOptions The following example shows how to open a generic PDF document AS tell application Adobe Photoshop 7 0 set myFilePath to alias a fil...

Страница 54: ...to open var fileRef new File a file path Create a PDF option object var pdfOpenOptions new PDFOpenOptions pdfOpenOptions antiAlias true pdfOpenOptions height 100 pdfOpenOptions width 200 pdfOpenOption...

Страница 55: ...s may not always be applicable It also means that many of the option values do not have well defined default values The best way to determine what values can or should be used for save is to perform a...

Страница 56: ...tte MatteType NONE jpgSaveOptions quality 1 activeDocument saveAs jpgFile jpgSaveOptions true Extension LOWERCASE 3 8 2 Document information A Photoshop document can be associated with additional info...

Страница 57: ...resize image current document width 4 height 4 VB docRef ResizeImage 4 4 JS docRef resizeImage 4 4 Resizing the canvas is done similarly AS resize canvas current document width 4 height 4 VB docRef R...

Страница 58: ...ers art layer and layer set Both types of layers have common properties such as visible The common attributes are placed in a general layer class that both art layer and layer set inherits from When y...

Страница 59: ...e used with the fill command Dim colorObj As Photoshop SolidColor Set colorObj CreateObject Photoshop SolidColor colorObj RGB Red 255 colorObj RGB Green 100 colorObj RGB Blue 0 Now apply fill to the c...

Страница 60: ...ll be created at the beginning of the document Dim newLayerSetRef As Photoshop LayerSet Set newLayerSetRef appRef ActiveDocument LayerSets Add Move the new layer to after the first layer newLayerSetRe...

Страница 61: ...yers can be moved into layer sets The following examples show how to create a layer set duplicate an existing layer and move the duplicate layer into the layer set AS set current document to document...

Страница 62: ...rs Scripting also supports linking and unlinking layers You may want to link layers together so that moving or transforming them can be done with one statement To link layers together do the following...

Страница 63: ...r named L1 NOTE The layer styles name is case sensitive AS apply layer style art layer L1 of current document using Puzzle Image VB docRef ArtLayers L1 ApplyStyle Puzzle Image JS docRef artLayers L1 a...

Страница 64: ...f docRef artLayers add newLayerRef kind LayerKind TEXT To check if an existing layer is a text layer you must compare the layer s kind to text layer psTextLayer LayerKind TEXT AS if kind of layerRef i...

Страница 65: ...the contents of the text item To set the contents of a text item in AppleScript you would write set contents of text item of art layer Layer 1 of current document to Hello If you use a text item obje...

Страница 66: ...20 magenta 50 yellow 30 black 0 VB Set newColor CreateObject Photoshop SolidColor newColor CMYK Cyan 20 newColor CMYK Magenta 100 newColor CMYK Yellow 30 newColor CMYK Black 0 textLayerRef TextItem Co...

Страница 67: ...ommon effect that can be applied to text To warp a text item object set the object s warp style WarpStyle warpStyle property The style to set it to is an enumeration AS set warp style of textItemRef t...

Страница 68: ...ther selection types are diminished extended and intersected The diminished type will shrink the current selection the extended selection type will grow the current selection and the intersected type...

Страница 69: ...rUnits originalRulerUnits JS remember unit settings and set to values expected by this script var originalRulerUnits preferences rulerUnits preferences rulerUnits Units PIXELS get selection and replac...

Страница 70: ...1 4 Expand contract and feather selections These three commands are used to change the size of the selection The values are passed in ruler units the value of which are stored in Photoshop preferences...

Страница 71: ...ences rulerUnits preferences rulerUnits Units PIXELS var selRef activeDocument selection selRef expand 5 selRef contract 5 selRef feather 5 restore unit setting preferences rulerUnits originalRulerUni...

Страница 72: ...ent document VB selRef Fill docRef HistoryStates 10 JS selRef fill activeDocument historyStates 9 3 11 6 Rotating selections You can rotate either the contents of a selection or the selection boundary...

Страница 73: ...ument into channel My Channel of current document combination type extended VB selRef Store docRef Channels My Channel psExtendSelection JS selRef store docRef channels My Channel SelectionType EXTEND...

Страница 74: ...eans that prior to running a filter you may have to set the active channels Since more than one channel can be active at a time you must provide an array of channels when setting a channel The code be...

Страница 75: ...ge its kind or change the current channel selection 3 13 1 Channel types In addition to the component channels Photoshop lets you to create additional channels You can create a spot color channel a ma...

Страница 76: ...ay docRef channels 0 docRef channels 2 docRef activeChannels theChannels Deleting a component will change the document to a multi channel document 3 13 3 Creating new channels You can create three dif...

Страница 77: ...set the foreground color you should create a SolidColor object set its color model by assigning the color model values and then set the foreground color to the solid color Here s how VB solidColor Cr...

Страница 78: ...trieve the hex value In Visual Basic and JavaScript the RGBColor object has a string property called HexValue hexValue 3 14 2 Getting and converting colors Here s how to get the foreground color in Ap...

Страница 79: ...ally equal to each other and false otherwise The examples below compare the foreground color to the background color AS if equal colors foreground color with background color then VB If appRef Foregro...

Страница 80: ...cRef HistoryStates 1 JS docRef activeHistoryState docRef historyStates 0 The code above sets the current history state to the top history state that is in the History palette Using history states in t...

Страница 81: ...information on working with selections 3 16 Clipboard interaction The clipboard commands in Photoshop Scripting Support operate on layers and selections The commands can be used to operate on a single...

Страница 82: ...opy merged selection of current document In VB and JS pass true for the Merged parameter of the Copy methods VB docRef Selection Copy True JS docRef selection copy true 3 16 3 Cut The Cut command oper...

Страница 83: ...set current document to document Doc2 set newLayerRef to paste In Visual Basic and JavaScript the paste command is defined on the Document object VB appRef ActiveDocument appRef Documents Doc2 Set ne...

Страница 84: ...o the actions that you perform from the UI The Windows version of ScriptingListener creates the following 2 files C ScriptingListenerJS log contains JavaScript code corresponding to the actions that a...

Страница 85: ...aScript code from the ScriptingListenerJS log file to another file and substitute the filter values with variable names In the following we have wrapped the code in a JavaScript function and replaced...

Страница 86: ...ipt values from JavaScript For example change the Emboss JavaScript shown in the previous section to the following and save it in a file called Emboss js function emboss angle height amount var id32 c...

Страница 87: ...ollection emboss arguments 0 arguments 1 arguments 2 From VBScript you can then run the Emboss filter by saying Set objApp CreateObject Photoshop Application objApp DoJavaScriptFile C Emboss js Array...

Страница 88: ...jApp SET objApp CreateObject Photoshop Application DIM id19 id19 objApp CharIDToTypeID Embs DIM desc4 SET desc4 CreateObject Photoshop ActionDescriptor DIM id20 id20 objApp CharIDToTypeID Angl Call de...

Страница 89: ...alues 78 Setting a Color 77 web safe colors 79 COM 8 Command and methods JavaScript 17 Commands and methods 17 AppleScript 17 Visual Basic 17 Comments in scripts 11 AppleScript 11 JavaScript 11 Visual...

Страница 90: ...r collections 10 Object inheritance 10 Object reference 10 12 13 Object references 42 AppleScript 42 Visual Basic and JavaScript 43 Opening a document 52 Operators 16 Other scripting languages 8 P Pho...

Страница 91: ...that take unit values 47 object properties that depend on unit values 46 special unit value types 46 V Value types array 13 boolean 12 13 double 13 integer 12 list 12 long 13 number 12 real 12 record...

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