Defines the methods and properties for the TextEngine object.
function lt.Document.Editor.TextEngine
class lt.Document.Editor.TextEngine()
This would be used to make changes to the text of the DocumentEditor.
This example branches from the DocumentEditor example, focusing on using the Text Engine
.
import { EditorInitializer } from '../utility/EditorInitializer';
import { editor } from '../utility/EditorInitializer';
export class TextEnginesExample {
run = () => {
new EditorInitializer();
this.initText();
}
initText = () => {
//Creates a new table in the document when the example is run
editor.engine.text.insertText("This is the initial text from running the example. Use 'ctrl + left-click' to follow Hyperlinks");
}
addText = () => {
//Allows the user to insert text at cursor location in the document with a prompt instead of typing in the document.
var input: string = prompt("Enter in the text you want to add")
editor.engine.text.insertText("\n" + input);
}
addParagraph = () => {
//Inserts a new paragraph into the document on the next line from the cursor location and indents with a tab
editor.engine.text.insertParagraph();
editor.engine.text.insertTab();
}
increaseFont = () => {
//Increase the font size of new text being typed or selected text
editor.engine.text.incrementFontSize(1);
}
decreaseFont = () => {
//Decrease the font size of new text being typed or selected text
editor.engine.text.incrementFontSize(-1);
}
increaseIndentSize = () => {
//Increase the indent size by one until it reaches the last possible size
editor.engine.text.incrementIndentSize(1);
}
decreaseIndentSize = () => {
//Decrease the indent size by one until it reaches the last possible size
editor.engine.text.incrementIndentSize(-1);
}
addLink = () => {
//Adds a hyperlink in to the selected text based in the input from the user. Use 'ctrl+left-click' to follow link
var input: string = prompt("Insert the hyperlink for the selected text")
editor.engine.text.insertLink(input);
}
deleteLink = () => {
//Removes the hyperlink from the selected text
editor.engine.text.removeLink();
}
}
export var editor: any = null;
export class EditorInitializer {
private callback: (editor: any) => void = null;
constructor(callback?: (editor: any) => void) {
this.callback = callback;
this.init();
}
init = () => {
this.setLicense();
this.initFactory();
this.addEditControl();
}
setLicense = () => {
lt.RasterSupport.setLicenseUri("https://demo.leadtools.com/licenses/js/LEADTOOLSEVAL.txt", "EVAL", function (setLicenseResult) {
if (setLicenseResult.result) {
console.log("LEADTOOLS client license set successfully");
} else {
var msg = "No LEADTOOLS License\n\nYour license file is missing, invalid or expired. LEADTOOLS will not function. Please contact LEAD Sales for information on obtaining a valid license.";
alert(msg);
var msgParagraph = document.createElement('p');
msgParagraph.innerText = msg;
var parent_1 = document.getElementById("div_container");
while (parent_1.firstElementChild) {
parent_1.removeChild(parent_1.firstElementChild);
}
parent_1.appendChild(msgParagraph);
console.log(msg);
}
});
}
initFactory = () => {
// To communicate with the DocumentsService, it must be running!
// Change these parameters to match the path to the service.
lt.Document.DocumentFactory.serviceHost = "http://localhost:40000";
lt.Document.DocumentFactory.servicePath = "";
lt.Document.DocumentFactory.serviceApiPath = "api";
// Set local proxy url template (Used in local load mode)
lt.Document.DocumentFactory.localProxyUrlTemplate = "http://localhost:40000/api/CorsProxy/Proxy?{0}";
// Ping the Document service
lt.Document.DocumentFactory.verifyService()
.done(function (response: ResponseType | any) {
var serviceInfo = "Service name: '" + response.serviceName + "'";
serviceInfo += " version: '" + response.serviceVersion + "'";
serviceInfo += " platform: '" + response.servicePlatform + "'";
serviceInfo += " OS: '" + response.serviceOperatingSystem + "'";
lt.LTHelper.log(serviceInfo);
})
.fail(function (jqXHR: string, statusText: string, errorThrown: string) {
var errMsg = "Cannot reach the LEADTOOLS Document Service.\n\nPlease Make sure LEADTOOLS DocumentService is running\n - Examples/Document/JS/DocumentServiceDotNet\n - Examples/Document/JS/DocumentServiceJava\nand verify that the service path is correct, then refresh the application.";
window.alert(errMsg);
console.log(errMsg);
});
}
addEditControl = () => {
//sets up the initial document editor object
var content = document.getElementById('content');
editor = new lt.Document.Editor.DocumentEditor({
root: content
});
this.registerClickEvents();
if (this.callback) {
this.callback(editor);
}
}
registerClickEvents = () => {
//registers the onclick functions for the buttons
const importClick = document.getElementById('importBtn');
importClick.onclick = (e) => {
this.selectAndLoadFile();
}
const exportClick = document.getElementById('exportBtn');
exportClick.onclick = (e) => {
this.exportAsPdf();
}
}
selectAndLoadFile = () => {
//creates an input element on the Import Document button to upload files
//into the document editor
var input = document.createElement('input');
input.type = 'file';
input.style.display = 'none';
input.accept = '.doc, .docx, .pdf, .rtf, .txt';
input.onchange = function (e) {
var files = input.files;
if (!files || !files.length)
return;
var file = files[0];
document.body.style.cursor = 'wait';
var promise = lt.Document.Editor.EditableDocument.fromFile(file);
promise.then(function (doc: HTMLElement) {
editor.setDocument(doc);
});
promise.finally(() => {
document.body.style.cursor = 'default';
});
};
input.click();
}
exportAsPdf = () => {
//exports the current document for saving
var promise = editor.document.toFile("untitled", lt.Document.Writer.DocumentFormat.pdf);
var err = null;
promise.then(function (name: string) { });
promise.catch(function (err: string) {
alert("There was an issue exporting the document. " + err);
});
}
}
import { EditorInitializer } from '../utility/EditorInitializer';
import { editor } from '../utility/EditorInitializer';
export class TextEnginesExample {
run = () => {
new EditorInitializer();
this.initText();
}
initText = () => {
//Creates a new table in the document when the example is run
editor.engine.text.insertText("This is the initial text from running the example. Use 'ctrl + left-click' to follow Hyperlinks");
}
addText = () => {
//Allows the user to insert text at cursor location in the document with a prompt instead of typing in the document.
var input = prompt("Enter in the text you want to add")
editor.engine.text.insertText("\n" + input);
}
addParagraph = () => {
//Inserts a new paragraph into the document on the next line from the cursor location and indents with a tab
editor.engine.text.insertParagraph();
editor.engine.text.insertTab();
}
increaseFont = () => {
//Increase the font size of new text being typed or selected text
editor.engine.text.incrementFontSize(1);
}
decreaseFont = () => {
//Decrease the font size of new text being typed or selected text
editor.engine.text.incrementFontSize(-1);
}
increaseIndentSize = () => {
//Increase the indent size by one until it reaches the last possible size
editor.engine.text.incrementIndentSize(1);
}
decreaseIndentSize = () => {
//Decrease the indent size by one until it reaches the last possible size
editor.engine.text.incrementIndentSize(-1);
}
addLink = () => {
//Adds a hyperlink in to the selected text based in the input from the user. Use 'ctrl+left-click' to follow link
var input = prompt("Insert the hyperlink for the selected text")
editor.engine.text.insertLink(input);
}
deleteLink = () => {
//Removes the hyperlink from the selected text
editor.engine.text.removeLink();
}
}
export let editor = null;
export class EditorInitializer {
constructor(callback) {
this.callback = callback;
this.init();
}
init = () => {
this.setLicense();
this.initFactory();
this.addEditControl();
}
setLicense = () => {
lt.RasterSupport.setLicenseUri("https://demo.leadtools.com/licenses/js/LEADTOOLSEVAL.txt", "EVAL", function (setLicenseResult) {
if (setLicenseResult.result) {
console.log("LEADTOOLS client license set successfully");
} else {
var msg = "No LEADTOOLS License\n\nYour license file is missing, invalid or expired. LEADTOOLS will not function. Please contact LEAD Sales for information on obtaining a valid license.";
alert(msg);
var msgParagraph = document.createElement('p');
msgParagraph.innerText = msg;
var parent_1 = document.getElementById("div_container");
while (parent_1.firstElementChild) {
parent_1.removeChild(parent_1.firstElementChild);
}
parent_1.appendChild(msgParagraph);
console.log(msg);
}
});
}
initFactory = () => {
// To communicate with the DocumentsService, it must be running!
// Change these parameters to match the path to the service.
lt.Document.DocumentFactory.serviceHost = "http://localhost:40000";
lt.Document.DocumentFactory.servicePath = "";
lt.Document.DocumentFactory.serviceApiPath = "api";
// Set local proxy url template (Used in local load mode)
lt.Document.DocumentFactory.localProxyUrlTemplate = "http://localhost:40000/api/CorsProxy/Proxy?{0}";
// Ping the Document service
lt.Document.DocumentFactory.verifyService()
.done(function (response) {
var serviceInfo = "Service name: '" + response.serviceName + "'";
serviceInfo += " version: '" + response.serviceVersion + "'";
serviceInfo += " platform: '" + response.servicePlatform + "'";
serviceInfo += " OS: '" + response.serviceOperatingSystem + "'";
lt.LTHelper.log(serviceInfo);
})
.fail(function (jqXHR, statusText, errorThrown) {
var errMsg = "Cannot reach the LEADTOOLS Document Service.\n\nPlease Make sure LEADTOOLS DocumentService is running\n - Examples/Document/JS/DocumentServiceDotNet\n - Examples/Document/JS/DocumentServiceJava\nand verify that the service path is correct, then refresh the application.";
window.alert(errMsg);
console.log(errMsg);
});
}
addEditControl = () => {
//sets up the initial document editor object
var content = document.getElementById('content');
editor = new lt.Document.Editor.DocumentEditor({
root: content
});
this.registerClickEvents();
if(this.callback){
this.callback(editor);
}
}
registerClickEvents = () => {
//registers the onclick functions for the buttons
const importClick = document.getElementById('importBtn');
importClick.onclick = (e) =>{
this.selectAndLoadFile();
}
const exportClick = document.getElementById('exportBtn');
exportClick.onclick = (e) =>{
this.exportAsPdf();
}
}
selectAndLoadFile = () => {
//creates an input element on the Import Document button to upload files
//into the document editor
var input = document.createElement('input');
input.type = 'file';
input.style.display = 'none';
input.accept = '.doc, .docx, .pdf, .rtf, .txt';
input.onchange = function (e) {
var files = input.files;
if (!files || !files.length)
return;
var file = files[0];
document.body.style.cursor = 'wait';
var promise = lt.Document.Editor.EditableDocument.fromFile(file);
promise.then(function (doc) {
editor.setDocument(doc);
});
promise.finally(()=> {
document.body.style.cursor = 'default';
});
};
input.click();
}
exportAsPdf = () => {
//exports the current document for saving
var promise = editor.document.toFile("untitled", lt.Document.Writer.DocumentFormat.pdf);
var err = null;
promise.then(function (name) { });
promise.catch(function (err) {
alert("There was an issue exporting the document. " + err);
});
}
}
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title> Using the Text Engine in the Document Editor</title>
<script src="https://code.jquery.com/jquery-3.6.0.js"></script>
<script src="https://code.jquery.com/ui/1.13.0/jquery-ui.js"></script>
<script crossorigin src="https://unpkg.com/react@17/umd/react.production.min.js"></script>
<script crossorigin src="https://unpkg.com/react-dom@17/umd/react-dom.production.min.js"></script>
<script src="../../lib/Leadtools.js"></script>
<script src="../../lib/Leadtools.Annotations.Engine.js"></script>
<script src="../../lib/Leadtools.Annotations.Automation.js"></script>
<script src="../../lib/Leadtools.Document.js"></script>
<script src="../../lib/Leadtools.Document.Editor.js"></script>
<link rel="stylesheet" type="text/css" href="../css/examples.css">
<script src="../../javascript/bundle.js"></script>
</head>
<body>
<div>
<div id="title">
Using the Text Engine in the Document Editor
</div>
<ul id="menu">
<li><a id="importBtn" class="rightLineBorder">Import Document</a></li>
<li><a id="exportBtn" class="rightLineBorder">Export Document</a></li>
<li><a id="exampleBtn" class="rightLineBorder">Run Example</a></li>
<li><a id="addTextBtn" class="rightLineBorder" style="display: none;">Add Text</a></li>
<li><a id="addParaBtn" class="rightLineBorder" style="display: none;">Add Paragraph</a></li>
<li><a id="incFontBtn" class="rightLineBorder" style="display: none;">Increase Font Size</a></li>
<li><a id="decFontBtn" class="rightLineBorder" style="display: none;">Decrease Font Size</a></li>
<li><a id="incIndentBtn" class="rightLineBorder" style="display: none;">Increase Indent Size</a></li>
<li><a id="decIndentBtn" class="rightLineBorder" style="display: none;">Decrease Indent Size</a></li>
<li><a id="addLinkBtn" class="rightLineBorder" style="display: none;">Add Hyperlink</a></li>
<li><a id="deleteLinkBtn" class="rightLineBorder" style="display: none;">Delete Hyperlink</a></li>
</ul>
</div>
<div id="editorWrapper" oncontextmenu="return false;">
<div class="inner-body" id="content">
</div>
</div>
</body>
<script>
//creates the onclick functions for the buttons and hides/shows them when necessary
window.onload = () => {
const button = document.getElementById('exampleBtn');
const example = new window.examples.TextEnginesExample();
const addTextBtn = document.getElementById('addTextBtn');
const addParaBtn = document.getElementById('addParaBtn');
const incFontBtn = document.getElementById('incFontBtn');
const decFontBtn = document.getElementById('decFontBtn');
const incIndentBtn = document.getElementById('incIndentBtn');
const decIndentBtn = document.getElementById('decIndentBtn');
const addLinkBtn = document.getElementById('addLinkBtn');
const deleteLinkBtn = document.getElementById('deleteLinkBtn');
button.onclick = () => {
example.run();
button.style.display = "none";
addTextBtn.style.display = "block";
addParaBtn.style.display = "block";
incFontBtn.style.display = "block";
decFontBtn.style.display = "block";
incIndentBtn.style.display = "block";
decIndentBtn.style.display = "block";
addLinkBtn.style.display = "block";
deleteLinkBtn.style.display = "block";
}
addTextBtn.onclick = () => {
example.addText();
}
addParaBtn.onclick = () => {
example.addParagraph();
}
incFontBtn.onclick = () => {
example.increaseFont();
}
decFontBtn.onclick = () => {
example.decreaseFont();
}
incIndentBtn.onclick = () => {
example.increaseIndentSize();
}
decIndentBtn.onclick = () => {
example.decreaseIndentSize();
}
addLinkBtn.onclick = () => {
example.addLink();
}
deleteLinkBtn.onclick = () => {
example.deleteLink();
}
};
</script>
</html>
html {
height: 100%;
}
body {
height: 100%;
margin: 0;
display: flex;
flex-direction: column;
}
#title {
padding: 10px;
font-size: 24px;
}
ul {
list-style-type: none;
margin: 0;
padding: 0;
overflow: hidden;
}
#editorWrapper {
border-top: 1px solid black;
height: 95%;
}
#content {
height: 100%;
}
li {
float: left;
}
li a {
display: block;
text-align: center;
padding: 14px 16px;
text-decoration: none;
cursor: pointer;
user-select: none;
font-weight: bold;
}
li:first-child {
margin-left: 5px;
}
.rightLineBorder {
border-right: 1px black solid;
}
li a:hover {
background-color: lightblue;
}
Leadtools.Document.Editor Namespace
Help Collections
Raster .NET | C API | C++ Class Library | HTML5 JavaScript
Document .NET | C API | C++ Class Library | HTML5 JavaScript
Medical .NET | C API | C++ Class Library | HTML5 JavaScript
Medical Web Viewer .NET
Multimedia
Direct Show .NET | C API | Filters
Media Foundation .NET | C API | Transforms
Supported Platforms
.NET, Java, Android, and iOS/macOS Assemblies
Imaging, Medical, and Document
C API/C++ Class Libraries
Imaging, Medical, and Document
HTML5 JavaScript Libraries
Imaging, Medical, and Document