JointJS+ TextEditor

ui.TextEditor is a powerful (rich-text) inline text editor that can be used on any SVG text element. The ui.TextEditor provides the following features:

• rich-text editing of SVG text
• caret & selections
• caret & selections can be styled in CSS
• double-click to select words, triple-click to select the entire text
• keyboard navigation native to the underlying OS
• API for programmatic access
• support for editing scaled & rotated text
• automatic URL hyperlinks detection and styling

Installation

Include joint.ui.textEditor.js and joint.ui.textEditor.css files to your HTML:

<link rel="stylesheet" type="text/css" href="joint.ui.textEditor.css">
<script src="joint.ui.textEditor.js"></script>

Usage

In the following example, we will show how to start inline text editing when the user double-clicks a text inside a JointJS element or a link. First we handle the cell:pointerdblclick event triggered by the paper. Inside our handler, we call the joint.ui.TextEditor.edit() method which starts the text editor on the SVG text under the target of the event. The only parameters we have to pass to this method is the SVG text DOM element, the cell view and the property path that will the text editor use to store the resulting text. Moreover, we also show how easy it is to apply auto-sizing on the text inside our elements so that they stretch based on the bounding box inside it.

// RECOMMENDED

paper.on('element:pointerdblclick', function(elementView, evt) {
    joint.ui.TextEditor.edit(evt.target, {
        cellView: elementView,
        textProperty: ['attrs', 'label', 'text'],
        annotationsProperty: ['attrs', 'label', 'annotations']
    });
});

paper.on('link:pointerdblclick', function(linkView, evt) {
    // Editing a link label
    var index = Number(linkView.findAttribute('label-idx', evt.target));
    joint.ui.TextEditor.edit(evt.target, {
        cellView: linkView,
        textProperty: ['labels', index, 'attrs', 'text', 'text'],
        annotationsProperty: ['labels', index, 'attrs', 'text', 'annotations']
    });
});

function autoSize(element) {

    var view = paper.findViewByModel(element);
    var textVel = view.vel.findOne('text');
    // Use bounding box without transformations so that our auto-sizing works
    // even on e.g. rotated element.
    var bbox = textVel.getBBox();
    // 16 = 2*8 which is the translation defined via ref-x ref-y for our rb element.
    element.resize(bbox.width + 16, bbox.height + 16);
}

graph.on('change:attrs', function(cell) { autoSize(cell) });

Note that there are two methods for starting up a text editor. The one we showed above (via the joint.ui.TextEditor.edit() function) is the easiest and recommended. The joint.ui.TextEditor.edit() function is a helper method that does a lot of things for us. First, it finds the nearest SVG <text> DOM element. Then it creates an instance of the joint.ui.TextEditor type and binds handlers for the 'text:change' event where it stores the new text content to your JointJS cells (elements or links). It also deals with annotations in case of rich text editing and more.

However, for completeness, we show another way to start text editing and that is by manually creating the instance of the joint.ui.TextEditor (not recommended if you don't know what you're doing):

// NOT RECOMMENDED

var ed;
paper.on('cell:pointerdblclick', function(cellView, evt) {
    var text = joint.ui.TextEditor.getTextElement(evt.target);
    if (text) {
        if (ed) ed.remove();   // Remove old editor if there was one.
        ed = new joint.ui.TextEditor({ text: text });
        ed.render(paper.el);

        ed.on('text:change', function(newText) {
            // Set the new text to the property that you use to change text in your views.
            cellView.model.attr('text/text', newText);
        });
    }
});

Note that using the first method, you can still access the actual instance of the text editor via joint.ui.TextEditor.ed property.

See the source code of the demo below for a complete example on using the inline text editor, including inline text editing of link labels.

Configuration

The following table lists options that you can pass to the ui.TextEditor.edit(el, opt) method (this is the recommended way to start you text editor):

.text-editor .caret.placeholder:before {        // The caret.
    background-color: red;
}
.text-editor .caret.placeholder:after {         // The placeholder text.
    content: 'Enter text...';
    font-style: italic;
    color: blue;
}

{
    attrs: {
        'class': 'url-annotation',
        fill: 'lightblue',
        'text-decoration': 'underline'
    }
}

textareaAttributes: {
    autocorrect: 'off',
    autocomplete: 'off',
    autocapitalize: 'off',
    spellcheck: 'false',
    tabindex: '0'
}

The following table lists options that you can pass to the ui.TextEditor constructor function (only for advanced use):

.text-editor .caret.placeholder:before {        // The caret.
    background-color: red;
}
.text-editor .caret.placeholder:after {         // The placholder text.
    content: 'Enter text...';
    font-style: italic;
    color: blue;
}

API

The following table lists methods that can be used on the joint.ui.TextEditor instance. If you, however, use the recommended way of creating the text editor via the joint.ui.TextEditor.edit() function, you usually do not want to deal with the actual instance (even though you can as you can always access the actual instance via joint.ui.TextEditor.ed property). To make it easy to work with the instance as with a black-box, joint.ui.TextEditor constructor exposes many of the methods directly (internally, it just proxies the methods to the actual instance.) The table below differentiates the instance methods from the class methods by using the full namespace access for the class methods (such as joint.ui.TextEditor.getAnnotations() = class method - vs getAnnotations() = instance method).

Events

The following table lists events that are triggered on the ui.TextEditor instance but also on the joint.ui.TextEditor class (which is useful if you use the recommended way of creating a text editor via the joint.ui.TextEditor.edit() function):

ed.on('select:change', function(selectionStart, selectionEnd) {
    var text = ed.getTextContent().substring(selectionStart, selectionEnd);
});

ed.on('select:changed', function(selectionStart, selectionEnd) {
    var text = ed.getTextContent().substring(selectionStart, selectionEnd);
});