dataTextarea.js

/**
Template Controllers

@module Templates
*/

/**
The data textarea template.

@class [template] dapp_dataTextarea
@constructor
*/

Template["dapp_dataTextarea"].onCreated(function() {
  // default set to true, to show no error
  TemplateVar.set("isValid", true);

  if (this.data && this.data.value) {
    TemplateVar.set("value", this.data.value);
  }
});

Template["dapp_dataTextarea"].onRendered(function() {
  if (this.data && this.data.value) {
    this.$("textarea").trigger("change");
  }
});

Template["dapp_dataTextarea"].helpers({
  /**
    Return the autofocus or disabled attribute.

    @method (additionalAttributes)
    */
  additionalAttributes: function() {
    var attr = {};

    if (this.autofocus) attr.autofocus = true;
    if (this.disabled) attr.disabled = true;

    return attr;
  }
});

Template["dapp_dataTextarea"].events({
  /**
    Set the value while typing
    
    @event input textarea, change textarea
    */
  "input textarea, change textarea": function(e, template) {
    var value = e.currentTarget.value.replace(/\s+/g, "");

    // remove multiline
    if (value.indexOf("\n") !== -1) {
      value = value.replace("\n", "");
      e.currentTarget.value = value;
    }

    // add 0x
    if (value.length > 2 && value.indexOf("0x") === -1) {
      value = "0x" + value;
      e.currentTarget.value = value;
    }

    if (/^(0x)?[a-f0-9]*$/i.test(value) || _.isEmpty(value)) {
      TemplateVar.set("isValid", true);
      if (!_.isEmpty(value))
        TemplateVar.set("value", "0x" + value.replace("0x", ""));
      else TemplateVar.set("value", undefined);
    } else {
      TemplateVar.set("isValid", false);
      TemplateVar.set("value", undefined);
    }
  }
});