Class Equation

  • An Equation element represents a mathematical expression and can contain EquationFunction, EquationSymbol, and Text elements.

  • Equation elements have methods to manipulate their content, such as clearing, copying, and editing as text.

  • You can search within an Equation element for specific element types or text patterns using provided methods.

  • Methods are available to get information about an Equation element's structure, including its children and parent.

  • You can set attributes, link URLs, and text alignment for an Equation element.

Equation

An element representing a mathematical expression. An Equation may contain EquationFunction , EquationSymbol , and Text elements. For more information on document structure, see the guide to extending Google Docs.

Methods

MethodReturn typeBrief description
clear() Equation Clears the contents of the element.
copy() Equation Returns a detached, deep copy of the current element.
editAsText() Text Obtains a Text version of the current element, for editing.
findElement(elementType) RangeElement Searches the contents of the element for a descendant of the specified type.
findElement(elementType, from) RangeElement Searches the contents of the element for a descendant of the specified type, starting from the specified RangeElement .
findText(searchPattern) RangeElement Searches the contents of the element for the specified text pattern using regular expressions.
findText(searchPattern, from) RangeElement Searches the contents of the element for the specified text pattern, starting from a given search result.
getAttributes() ObjectRetrieves the element's attributes.
getChild(childIndex) Element Retrieves the child element at the specified child index.
getChildIndex(child) IntegerRetrieves the child index for the specified child element.
getLinkUrl() StringRetrieves the link url.
getNextSibling() Element Retrieves the element's next sibling element.
getNumChildren() IntegerRetrieves the number of children.
getParent() ContainerElement Retrieves the element's parent element.
getPreviousSibling() Element Retrieves the element's previous sibling element.
getText() StringRetrieves the contents of the element as a text string.
getTextAlignment() TextAlignment Gets the text alignment.
getType() ElementType Retrieves the element's ElementType .
isAtDocumentEnd() BooleanDetermines whether the element is at the end of the Document .
merge() Equation Merges the element with the preceding sibling of the same type.
removeFromParent() Equation Removes the element from its parent.
replaceText(searchPattern, replacement) Element Replaces all occurrences of a given text pattern with a given replacement string, using regular expressions.
setAttributes(attributes) Equation Sets the element's attributes.
setLinkUrl(url) Equation Sets the link url.
setTextAlignment(textAlignment) Equation Sets the text alignment.

Detailed documentation

clear()

Clears the contents of the element.

Return

Equation — The current element.


copy()

Returns a detached, deep copy of the current element.

Any child elements present in the element are also copied. The new element doesn't have a parent.

Return

Equation — The new copy.

Authorization

Scripts that use this method require authorization with one or more of the following scopes:

  • https://www.googleapis.com/auth/documents.currentonly
  • https://www.googleapis.com/auth/documents

editAsText()

Obtains a Text version of the current element, for editing.

Use editAsText for manipulating the elements contents as rich text. The editAsText mode ignores non-text elements (such as InlineImage and HorizontalRule ).

Child elements fully contained within a deleted text range are removed from the element.

constbody=
DocumentApp.getActiveDocument().getActiveTab().asDocumentTab().getBody();
// Insert two paragraphs separated by a paragraph containing an
// horizontal rule.
body.insertParagraph(0,'An editAsText sample.');
body.insertHorizontalRule(0);
body.insertParagraph(0,'An example.');
// Delete " sample.\n\n An" removing the horizontal rule in the process.
body.editAsText().deleteText(14,25);

Return

Text — a text version of the current element


findElement(elementType)

Searches the contents of the element for a descendant of the specified type.

Parameters

NameTypeDescription
elementTypeElementType The type of element to search for.

Return

RangeElement — A search result indicating the position of the search element.

Authorization

Scripts that use this method require authorization with one or more of the following scopes:

  • https://www.googleapis.com/auth/documents.currentonly
  • https://www.googleapis.com/auth/documents

findElement(elementType, from)

Searches the contents of the element for a descendant of the specified type, starting from the specified RangeElement .

constbody=
DocumentApp.getActiveDocument().getActiveTab().asDocumentTab().getBody();
// Define the search parameters.
letsearchResult=null;
// Search until the paragraph is found.
while(
(searchResult=body.findElement(
DocumentApp.ElementType.PARAGRAPH,
searchResult,
))){
constpar=searchResult.getElement().asParagraph();
if(par.getHeading()===DocumentApp.ParagraphHeading.HEADING1){
// Found one, update and stop.
par.setText('This is the first header.');
break;
}
}

Parameters

NameTypeDescription
elementTypeElementType The type of element to search for.
fromRangeElement The search result to search from.

Return

RangeElement — A search result indicating the next position of the search element.

Authorization

Scripts that use this method require authorization with one or more of the following scopes:

  • https://www.googleapis.com/auth/documents.currentonly
  • https://www.googleapis.com/auth/documents

findText(searchPattern)

Searches the contents of the element for the specified text pattern using regular expressions.

A subset of the JavaScript regular expression features are not fully supported, such as capture groups and mode modifiers.

The provided regular expression pattern is independently matched against each text block contained in the current element.

Parameters

NameTypeDescription
searchPatternStringthe pattern to search for

Return

RangeElement — a search result indicating the position of the search text, or null if there is no match

Authorization

Scripts that use this method require authorization with one or more of the following scopes:

  • https://www.googleapis.com/auth/documents.currentonly
  • https://www.googleapis.com/auth/documents

findText(searchPattern, from)

Searches the contents of the element for the specified text pattern, starting from a given search result.

A subset of the JavaScript regular expression features are not fully supported, such as capture groups and mode modifiers.

The provided regular expression pattern is independently matched against each text block contained in the current element.

Parameters

NameTypeDescription
searchPatternStringthe pattern to search for
fromRangeElement the search result to search from

Return

RangeElement — a search result indicating the next position of the search text, or null if there is no match

Authorization

Scripts that use this method require authorization with one or more of the following scopes:

  • https://www.googleapis.com/auth/documents.currentonly
  • https://www.googleapis.com/auth/documents

getAttributes()

Retrieves the element's attributes.

The result is an object containing a property for each valid element attribute where each property name corresponds to an item in the DocumentApp.Attribute enumeration.

constdoc=DocumentApp.getActiveDocument();
constdocumentTab=doc.getActiveTab().asDocumentTab();
constbody=documentTab.getBody();
// Append a styled paragraph.
constpar=body.appendParagraph('A bold, italicized paragraph.');
par.setBold(true);
par.setItalic(true);
// Retrieve the paragraph's attributes.
constatts=par.getAttributes();
// Log the paragraph attributes.
for(constattinatts){
Logger.log(`${att}:${atts[att]}`);
}

Return

Object — The element's attributes.

Authorization

Scripts that use this method require authorization with one or more of the following scopes:

  • https://www.googleapis.com/auth/documents.currentonly
  • https://www.googleapis.com/auth/documents

getChild(childIndex)

Retrieves the child element at the specified child index.

constbody=
DocumentApp.getActiveDocument().getActiveTab().asDocumentTab().getBody();
// Obtain the first element in the tab.
constfirstChild=body.getChild(0);
// If it's a paragraph, set its contents.
if(firstChild.getType()===DocumentApp.ElementType.PARAGRAPH){
firstChild.asParagraph().setText('This is the first paragraph.');
}

Parameters

NameTypeDescription
childIndexIntegerThe index of the child element to retrieve.

Return

Element — The child element at the specified index.

Authorization

Scripts that use this method require authorization with one or more of the following scopes:

  • https://www.googleapis.com/auth/documents.currentonly
  • https://www.googleapis.com/auth/documents

getChildIndex(child)

Retrieves the child index for the specified child element.

Parameters

NameTypeDescription
childElement The child element for which to retrieve the index.

Return

Integer — The child index.

Authorization

Scripts that use this method require authorization with one or more of the following scopes:

  • https://www.googleapis.com/auth/documents.currentonly
  • https://www.googleapis.com/auth/documents

getLinkUrl()

Retrieves the link url.

Return

String — the link url, or null if the element contains multiple values for this attribute

Authorization

Scripts that use this method require authorization with one or more of the following scopes:

  • https://www.googleapis.com/auth/documents.currentonly
  • https://www.googleapis.com/auth/documents

getNextSibling()

Retrieves the element's next sibling element.

The next sibling has the same parent and follows the current element.

Return

Element — The next sibling element.

Authorization

Scripts that use this method require authorization with one or more of the following scopes:

  • https://www.googleapis.com/auth/documents.currentonly
  • https://www.googleapis.com/auth/documents

getNumChildren()

Retrieves the number of children.

constbody=
DocumentApp.getActiveDocument().getActiveTab().asDocumentTab().getBody();
// Log the number of elements in the tab.
Logger.log(`There are ${body.getNumChildren()} elements in the tab's body.`);

Return

Integer — The number of children.

Authorization

Scripts that use this method require authorization with one or more of the following scopes:

  • https://www.googleapis.com/auth/documents.currentonly
  • https://www.googleapis.com/auth/documents

getParent()

Retrieves the element's parent element.

The parent element contains the current element.

Return

ContainerElement — The parent element.

Authorization

Scripts that use this method require authorization with one or more of the following scopes:

  • https://www.googleapis.com/auth/documents.currentonly
  • https://www.googleapis.com/auth/documents

getPreviousSibling()

Retrieves the element's previous sibling element.

The previous sibling has the same parent and precedes the current element.

Return

Element — The previous sibling element.

Authorization

Scripts that use this method require authorization with one or more of the following scopes:

  • https://www.googleapis.com/auth/documents.currentonly
  • https://www.googleapis.com/auth/documents

getText()

Retrieves the contents of the element as a text string.

Return

String — the contents of the element as text string

Authorization

Scripts that use this method require authorization with one or more of the following scopes:

  • https://www.googleapis.com/auth/documents.currentonly
  • https://www.googleapis.com/auth/documents

getTextAlignment()

Gets the text alignment. The available types of alignment are DocumentApp.TextAlignment.NORMAL, DocumentApp.TextAlignment.SUBSCRIPT, and DocumentApp.TextAlignment.SUPERSCRIPT.

Return

TextAlignment — the type of text alignment, or null if the text contains multiple types of text alignments or if the text alignment has never been set

Authorization

Scripts that use this method require authorization with one or more of the following scopes:

  • https://www.googleapis.com/auth/documents.currentonly
  • https://www.googleapis.com/auth/documents

getType()

Retrieves the element's ElementType .

Use getType() to determine the exact type of a given element.

constdoc=DocumentApp.getActiveDocument();
constdocumentTab=doc.getActiveTab().asDocumentTab();
constbody=documentTab.getBody();
// Obtain the first element in the active tab's body.
constfirstChild=body.getChild(0);
// Use getType() to determine the element's type.
if(firstChild.getType()===DocumentApp.ElementType.PARAGRAPH){
Logger.log('The first element is a paragraph.');
}else{
Logger.log('The first element is not a paragraph.');
}

Return

ElementType — The element type.

Authorization

Scripts that use this method require authorization with one or more of the following scopes:

  • https://www.googleapis.com/auth/documents.currentonly
  • https://www.googleapis.com/auth/documents

isAtDocumentEnd()

Determines whether the element is at the end of the Document .

Return

Boolean — Whether the element is at the end of the tab.

Authorization

Scripts that use this method require authorization with one or more of the following scopes:

  • https://www.googleapis.com/auth/documents.currentonly
  • https://www.googleapis.com/auth/documents

merge()

Merges the element with the preceding sibling of the same type.

Only elements of the same ElementType can be merged. Any child elements contained in the current element are moved to the preceding sibling element.

The current element is removed from the document.

constdoc=DocumentApp.getActiveDocument();
constdocumentTab=doc.getActiveTab().asDocumentTab();
constbody=documentTab.getBody();
// Example 1: Merge paragraphs
// Append two paragraphs to the document's active tab.
constpar1=body.appendParagraph('Paragraph 1.');
constpar2=body.appendParagraph('Paragraph 2.');
// Merge the newly added paragraphs into a single paragraph.
par2.merge();
// Example 2: Merge table cells
// Create a two-dimensional array containing the table's cell contents.
constcells=[
['Row 1, Cell 1','Row 1, Cell 2'],
['Row 2, Cell 1','Row 2, Cell 2'],
];
// Build a table from the array.
consttable=body.appendTable(cells);
// Get the first row in the table.
constrow=table.getRow(0);
// Get the two cells in this row.
constcell1=row.getCell(0);
constcell2=row.getCell(1);
// Merge the current cell into its preceding sibling element.
constmerged=cell2.merge();

Return

Equation — The merged element.

Authorization

Scripts that use this method require authorization with one or more of the following scopes:

  • https://www.googleapis.com/auth/documents.currentonly
  • https://www.googleapis.com/auth/documents

removeFromParent()

Removes the element from its parent.

constdoc=DocumentApp.getActiveDocument();
constdocumentTab=doc.getActiveTab().asDocumentTab();
constbody=documentTab.getBody();
// Remove all images in the active tab's body.
constimgs=body.getImages();
for(leti=0;i < imgs.length;i++){
imgs[i].removeFromParent();
}

Return

Equation — The removed element.

Authorization

Scripts that use this method require authorization with one or more of the following scopes:

  • https://www.googleapis.com/auth/documents.currentonly
  • https://www.googleapis.com/auth/documents

replaceText(searchPattern, replacement)

Replaces all occurrences of a given text pattern with a given replacement string, using regular expressions.

The search pattern is passed as a string, not a JavaScript regular expression object. Because of this you'll need to escape any backslashes in the pattern.

This methods uses Google's RE2 regular expression library, which limits the supported syntax.

The provided regular expression pattern is independently matched against each text block contained in the current element.

constbody=
DocumentApp.getActiveDocument().getActiveTab().asDocumentTab().getBody();
// Clear the text surrounding "Apps Script", with or without text.
body.replaceText('^.*Apps ?Script.*$','Apps Script');

Parameters

NameTypeDescription
searchPatternStringthe regex pattern to search for
replacementStringthe text to use as replacement

Return

Element — the current element

Authorization

Scripts that use this method require authorization with one or more of the following scopes:

  • https://www.googleapis.com/auth/documents.currentonly
  • https://www.googleapis.com/auth/documents

setAttributes(attributes)

Sets the element's attributes.

The specified attributes parameter must be an object where each property name is an item in the DocumentApp.Attribute enumeration and each property value is the new value to be applied.

constdoc=DocumentApp.getActiveDocument();
constdocumentTab=doc.getActiveTab().asDocumentTab();
constbody=documentTab.getBody();
// Define a custom paragraph style.
conststyle={};
style[DocumentApp.Attribute.HORIZONTAL_ALIGNMENT]=
DocumentApp.HorizontalAlignment.RIGHT;
style[DocumentApp.Attribute.FONT_FAMILY]='Calibri';
style[DocumentApp.Attribute.FONT_SIZE]=18;
style[DocumentApp.Attribute.BOLD]=true;
// Append a plain paragraph.
constpar=body.appendParagraph('A paragraph with custom style.');
// Apply the custom style.
par.setAttributes(style);

Parameters

NameTypeDescription
attributesObjectThe element's attributes.

Return

Equation — The current element.

Authorization

Scripts that use this method require authorization with one or more of the following scopes:

  • https://www.googleapis.com/auth/documents.currentonly
  • https://www.googleapis.com/auth/documents

setLinkUrl(url)

Sets the link url.

Parameters

NameTypeDescription
urlStringthe link url

Return

Equation — the current element

Authorization

Scripts that use this method require authorization with one or more of the following scopes:

  • https://www.googleapis.com/auth/documents.currentonly
  • https://www.googleapis.com/auth/documents

setTextAlignment(textAlignment)

Sets the text alignment. The available types of alignment are DocumentApp.TextAlignment.NORMAL, DocumentApp.TextAlignment.SUBSCRIPT, and DocumentApp.TextAlignment.SUPERSCRIPT.

// Make the entire first paragraph in the active tab be superscript.
constdocumentTab=
DocumentApp.getActiveDocument().getActiveTab().asDocumentTab();
consttext=documentTab.getBody().getParagraphs()[0].editAsText();
text.setTextAlignment(DocumentApp.TextAlignment.SUPERSCRIPT);

Parameters

NameTypeDescription
textAlignmentTextAlignment the type of text alignment to apply

Return

Equation — the current element

Authorization

Scripts that use this method require authorization with one or more of the following scopes:

  • https://www.googleapis.com/auth/documents.currentonly
  • https://www.googleapis.com/auth/documents

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Last updated 2024年12月03日 UTC.