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Class

ScriptDocument

NotCreatableNotReplicated
Inherits
Instance › Object
Memory category
Instances

Represents the ephemeral state of an open document in the Studio Script Editor, providing APIs for reading and editing code.

A ScriptDocument instance is a proxy of the document of a Studio Script Editor. It's different from the LuaSourceContainer open in the editor in that it represents the ephemeral state of an open document, and its representation is in a format that's more suited for reading and editing code than executing it. In particular, ScriptDocument reflects any changes that have been made to the open script in Drafts Mode, which the source property doesn't.

The Script Editor itself exists and changes on a different thread than any DataModel, so the ScriptDocument replicates the open Script Editor, but it isn't the open editor. Because of the replication, there's sometimes a slight delay between changing the text in the editor and updating the ScriptDocument. The delay usually occurs because the DataModel is busy, and it's almost always extremely small, but it still exists.

The existence of a ScriptDocument indicates that a document is open in the Script Editor. All ScriptDocument instances have ScriptEditorService as its parent. Each instance adheres to the following encoding conventions:

  • All text in ScriptDocument is UTF-8 encoded.
  • All line indices are 1-indexed.
  • All character indices are 1-indexed and count UTF-8 bytes, not graphemes, so the same warning from TextBox.CursorPosition applies: many Unicode characters take more than one byte.
  • All ranges are inclusive of their start position and exclusive of their end position, so start == end implies an empty range.

All APIs for ScriptDocument are at Plugin level security.

Methods 17#

CloseAsyncRequests that the editor associated with this document close. Yields the current thread until the editor responds to the request.PluginSecurity securityYields
EditTextAsyncReplaces the text in the specified range from (startLine, startColumn) to (endLine, endColumn) with newText.PluginSecurity securityYields
ForceSetSelectionAsyncAsks the editor to set its cursor selection to the argument values.PluginSecurity securityYields
GetLineReturns the text of the specified line. When no argument is provided, returns the line of the current cursor position.PluginSecurity security
GetLineCountReturns the number of lines in the document.PluginSecurity security
GetScriptReturns the underlying LuaSourceContainer instance, if one exists, otherwise nil.PluginSecurity security
GetSelectedTextGets the text selected in the editor, or an empty string if there is no selection.PluginSecurity security
GetSelectionReturns the last known selection of the Script Editor in the format: CursorLine, CursorChar, AnchorLine, AnchorChar. If the Script Editor has no selection, CursorLine == AnchorLine and CursorChar == AnchorChar.PluginSecurity security
GetSelectionEndGets the larger of the cursor position and anchor. If the editor has no selection, they are the same value.PluginSecurity security
GetSelectionStartGets the smaller of the cursor position and anchor. If the editor has no selection, they are the same value.PluginSecurity security
GetTextReturns text from the open editor.PluginSecurity security
GetViewportReturns the currently displayed line numbers in the editor change.PluginSecurity security
HasSelectedTextReturns whether or not the editor has any text selected.PluginSecurity security
IsCommandBarReturns true if the ScriptDocument represents the Command bar.PluginSecurity security
MultiEditTextAsyncApplies a batch of text edits to the document as a single atomic operation. Yields the current thread until the editor responds.PluginSecurity securityYields
RequestSetSelectionAsyncAsks the editor to set its cursor selection to the argument values.PluginSecurity securityYields
ReviewableTextEditsAsyncApplies a batch of line-based text edits that appear in the editor as reviewable inline diffs, allowing users to accept or reject each change.PluginSecurity securityYields

CloseAsync(): Tuple#

YieldsPluginSecurity security

Requests that the editor associated with this document close. Yields the current thread until the editor responds to the request. If the function succeeds, it returns (true, nil). If the function fails, it returns (false, string) as a description of the problem.

This function can't close the command bar.

Returns
  • Tuple — A tuple where the first element is true if the editor closed successfully, or false followed by a string describing the failure reason.

EditTextAsync(newText: string, startLine: int, startCharacter: int, endLine: int, endCharacter: int): Tuple#

YieldsPluginSecurity security

Replaces the text in the specified range from (startLine, startColumn) to (endLine, endColumn) with newText. If the range is empty, then the function inserts the text at (startLine, startColumn). If the text cursor is within the specified range, the cursor moves to the end position of the edit. Otherwise, the text cursor doesn't move. This function yields the current thread until it receives a reply from the editor about the edit.

If the function succeeds, it returns (true, nil).

The function throws an error if:

  • The range is invalid.
  • The range would slice one Unicode character, for example replace only some of the bytes of the unicode character.
  • The newText itself contains invalid UTF-8.

If the function fails, it returns (false, string). The string is a description of the problem. The most common failure type is a version mismatch. This occurs when you try to call EditTextAsync during the time when the ScriptDocument is out of sync with the contents of the editor. If this happens, you can retry the edit.

NameTypeDefaultDescription
newTextstringThe replacement string to insert into the specified range.
startLineintThe 1-indexed line number where the replacement range begins.
startCharacterintThe 1-indexed UTF-8 byte offset within startLine where the replacement range begins.
endLineintThe 1-indexed line number where the replacement range ends (exclusive).
endCharacterintThe 1-indexed UTF-8 byte offset within endLine where the replacement range ends (exclusive).
Returns
  • Tuple — A tuple where the first element is true if the edit was applied successfully, or false followed by a string describing the failure reason.

ForceSetSelectionAsync(cursorLine: int, cursorCharacter: int, anchorLine: int? = nil, anchorCharacter: int? = nil): Tuple#

YieldsPluginSecurity security

Asks the editor to set its cursor selection to the argument values. Both anchor arguments must be passed, or neither. If neither is passed, then they each default to being the same as the corresponding cursor argument. The editor might decline to update its cursor if the text content of the document has changed. Unlike ScriptDocument:RequestSetSelectionAsync(), the editor will not decline to move its cursor if the cursor has moved since the request was made. Returns (true, nil) if the cursor was updated, and (false, string) with an explanation string if it was not. Yields the current thread until the editor replies.

NameTypeDefaultDescription
cursorLineintThe 1-indexed line number for the cursor position.
cursorCharacterintThe 1-indexed UTF-8 byte offset within the line for the cursor position.
anchorLineint?nilThe 1-indexed line number for the anchor position. Defaults to cursorLine if not provided.
anchorCharacterint?nilThe 1-indexed UTF-8 byte offset within the line for the anchor position. Defaults to cursorCharacter if not provided.
Returns
  • Tuple — A tuple where the first element is true if the cursor was updated, or false followed by a string explaining why the update was declined.

GetLine(lineIndex: int? = nil): string#

PluginSecurity security

Returns the text of the specified line. When no argument is provided, returns the line of the current cursor position.

NameTypeDefaultDescription
lineIndexint?nilThe 1-indexed line number to retrieve. Defaults to the current cursor line if not provided.
Returns
  • string — The text content of the specified line as a string.

GetLineCount(): int#

PluginSecurity security

Returns the number of lines in the active document.

Returns
  • int — The total number of lines in the document.

GetScript(): LuaSourceContainer#

PluginSecurity security

Returns the underlying LuaSourceContainer instance, if one exists, otherwise nil.

Returns
  • LuaSourceContainer — The LuaSourceContainer that the document is editing, or nil if the document does not represent a script instance in the place (e.g. the Command Bar is not a real script instance).

GetSelectedText(): string#

PluginSecurity security

Gets the text selected in the editor, or an empty string if there is no selection.

Returns
  • string — The currently selected text as a string, or an empty string if nothing is selected.

GetSelection(): Tuple#

PluginSecurity security

Returns the last known selection of the Script Editor in the format: CursorLine, CursorChar, AnchorLine, AnchorChar. If the Script Editor has no selection, CursorLine == AnchorLine and CursorChar == AnchorChar.

Returns
  • Tuple — CursorLine, CursorChar, AnchorLine, AnchorChar.

GetSelectionEnd(): Tuple#

PluginSecurity security

Gets the larger of the cursor position and anchor. If the editor has no selection, they are the same value.

Returns
  • Tuple — A tuple of (line, character) representing the larger of the cursor and anchor positions, both 1-indexed.

GetSelectionStart(): Tuple#

PluginSecurity security

Gets the smaller of the cursor position and anchor. If the editor has no selection, they are the same value.

Returns
  • Tuple — A tuple of (line, character) representing the smaller of the cursor and anchor positions, both 1-indexed.

GetText(startLine: int? = nil, startCharacter: int? = nil, endLine: int? = nil, endCharacter: int? = nil): string#

PluginSecurity security

Returns text from the open editor. Must be called with 0, 2 or 4 arguments:

  • If called with 0 arguments, gets the entire contents of the open editor.
  • If called with 2 arguments, gets the text of the document starting at (startLine, startColumn).
  • If called with 4 arguments, gets the text of the document starting at (startLine, startColumn) and ending at (endLine, endColumn).
NameTypeDefaultDescription
startLineint?nilThe 1-indexed line number where the text range begins. Optional; omit all arguments to get the entire document.
startCharacterint?nilThe 1-indexed UTF-8 byte offset within startLine where the text range begins.
endLineint?nilThe 1-indexed line number where the text range ends (exclusive). Optional; omit to read from startLine/startCharacter to the end of the document.
endCharacterint?nilThe 1-indexed UTF-8 byte offset within endLine where the text range ends (exclusive).
Returns
  • string — The text content within the specified range as a string.

GetViewport(): Tuple#

PluginSecurity security

Returns the currently displayed line numbers in the editor change. The editor displays the lines between startLine and endLine, inclusive. The first and last line might only display partially. For example, only the topmost pixel of the last line might be on screen. Furthermore, code folding might hide lines between startLine and endLine.

Returns
  • Tuple — A tuple of (startLine, endLine) representing the 1-indexed range of lines currently visible in the editor.

HasSelectedText(): boolean#

PluginSecurity security

Returns whether or not the editor has any text selected.

Returns
  • boolean — true if the editor has a non-empty text selection, false otherwise.

IsCommandBar(): boolean#

PluginSecurity security

Returns true if the ScriptDocument represents the Command bar. The command bar has special rules and limitations in this API:

  • Studio creates the Command bar before running plugins, so it doesn't always fire the opened event, although it does close and reopen as Studio transitions between DataModels.
  • You can't edit the Command bar with EditTextAsync for security reasons.
Returns
  • boolean — true if this document represents the Command bar, false otherwise.

MultiEditTextAsync(edits: Array): Tuple#

YieldsPluginSecurity security

Applies a batch of text edits to the document as a single atomic operation, then yields the current thread until it receives a reply from the editor. Each entry in the edits array is a table describing one replacement, with the same meaning as the arguments to ScriptDocument:EditTextAsync(), and the following fields:

  • NewText: The replacement text.
  • StartLine: The line of the start of the range to replace.
  • StartCharacter: The character of the start of the range to replace.
  • EndLine: The line of the end of the range to replace.
  • EndCharacter: The character of the end of the range to replace.

The edits are applied together, so either all of them succeed or none of them are applied. Before applying any edit, the function validates every edit and throws an error if:

  • Any range is invalid.
  • Any range would slice one Unicode character, for example replace only some of the bytes of the unicode character.
  • Any NewText itself contains invalid UTF-8.
  • The ranges of two edits overlap.

If the function succeeds, it returns (true, nil). If the function fails, it returns (false, string), where the string describes the problem. As with ScriptDocument:EditTextAsync(), the most common failure is a version mismatch, which occurs when the ScriptDocument is momentarily out of sync with the contents of the editor; if this happens, you can retry the edits.

NameTypeDefaultDescription
editsArrayAn array of tables, each describing a text replacement with fields NewText, StartLine, StartCharacter, EndLine, and EndCharacter.
Returns
  • Tuple — A tuple where the first element is true if all edits were applied successfully, or false followed by a string describing the failure reason.

RequestSetSelectionAsync(cursorLine: int, cursorCharacter: int, anchorLine: int? = nil, anchorCharacter: int? = nil): Tuple#

YieldsPluginSecurity security

Asks the editor to set its cursor selection to the argument values. Both anchor arguments must be passed, or neither. If neither is passed, then they each default to being the same as the corresponding cursor argument. The editor might decline to update its cursor if the text content of the document has changed, or the cursor has moved since the request was made. Returns (true, nil) if the cursor was updated, and (false, string) with an explanation string if it was not. Yields the current thread until the editor replies.

NameTypeDefaultDescription
cursorLineintThe 1-indexed line number for the cursor position.
cursorCharacterintThe 1-indexed UTF-8 byte offset within the line for the cursor position.
anchorLineint?nilThe 1-indexed line number for the anchor position. Defaults to cursorLine if not provided.
anchorCharacterint?nilThe 1-indexed UTF-8 byte offset within the line for the anchor position. Defaults to cursorCharacter if not provided.
Returns
  • Tuple — A tuple where the first element is true if the cursor was updated, or false followed by a string explaining why the update was declined.

ReviewableTextEditsAsync(changes: Array): Tuple#

YieldsPluginSecurity security

Applies a batch of line-based text edits to the document that are presented to the user as reviewable inline diffs in the Script Editor gutter. Each entry in the changes array is a table with the following fields:

  • Text: The replacement text to insert. Must be a non-empty string unless EndLine is provided.
  • StartLine: The 1-indexed line number where the edit begins. If EndLine is omitted, the text is inserted before this line. If EndLine is provided, lines from StartLine through EndLine are replaced.
  • EndLine: Optional. The 1-indexed last line of the range to replace (inclusive). Must be greater than or equal to StartLine.

The edits must not overlap or border each other; there must be at least one unchanged line between any two edits. Edits are applied atomically. The function throws an error if any entry has invalid fields. If the function fails due to a version mismatch or other editor-side issue, it returns (false, string).

This method cannot be used on the Command bar.

NameTypeDefaultDescription
changesArrayAn array of tables, each with a Text field (the replacement string), a StartLine field (1-indexed line to insert or begin replacing at), and an optional EndLine field (1-indexed last line to replace, inclusive).
Returns
  • Tuple — A tuple where the first element is true if the edits were applied successfully, or false followed by a string describing the failure reason.

Events 2#

SelectionChangedFires when the ScriptDocument changes, including immediately after a text change.PluginSecurity security
ViewportChangedFires when the displayed line numbers in the editor change.PluginSecurity security

SelectionChanged(positionLine: int64, positionCharacter: int64, anchorLine: int64, anchorCharacter: int64)#

PluginSecurity security

Fires when the ScriptDocument changes, including immediately after a text change.

NameTypeDefaultDescription
positionLineint64The 1-indexed line number of the cursor position after the change.
positionCharacterint64The 1-indexed UTF-8 byte offset of the cursor position after the change.
anchorLineint64The 1-indexed line number of the selection anchor after the change.
anchorCharacterint64The 1-indexed UTF-8 byte offset of the selection anchor after the change.

ViewportChanged(startLine: int64, endLine: int64)#

PluginSecurity security

Fires when the displayed line numbers in the editor change. See ScriptDocument.GetViewport for details.

NameTypeDefaultDescription
startLineint64The 1-indexed first line currently visible in the editor viewport.
endLineint64The 1-indexed last line currently visible in the editor viewport.

Inherited members#

Inherited from Instance 58
Inherited from Object 6
Properties (2)

ClassName, className

Events (1)

Changed