7.0 add web text widget

web_text_widget/static/src/css/text_limited.css

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+div.oe_form_field.oe_form_field_text {
+    position: relative;
+}
+
+span.length_limit {
+    position: absolute;
+    right: 0;
+}

web_text_widget/static/src/js/text_limited.js

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+openerp.web_text_widget = function (instance)
+{
+
+var QWeb = instance.web.qweb;
+var _t = instance.web._t;
+
+
+instance.web_text_widget.FieldTextLimited = instance.web.form.FieldText.extend(
+    instance.web.form.ReinitializeFieldMixin, {
+    template: 'FieldText',
+    LIMIT_LINES_CONTEXT_KEY: 'limit_lines',
+    LIMIT_LINES_DEFAULT: 10,
+    LIMIT_CHARS_CONTEXT_KEY: 'limit_chars',
+    LIMIT_CHARS_DEFAULT: 500,
+
+    events: {
+        'keyup': function (e) {
+            if (e.which === $.ui.keyCode.ENTER) {
+                e.stopPropagation();
+            }
+            this.limit_value($(e.target));
+        },
+        'change textarea': 'store_dom_value',
+    },
+
+    limit_value: function($textarea)
+    {
+        var ctx = this.build_context().eval();
+        var limit_lines = ctx[this.LIMIT_LINES_CONTEXT_KEY]*1
+        if (!limit_lines){
+            limit_lines = this.LIMIT_LINES_DEFAULT;
+            console.log("No default values found for limit lines in '"
+             + this.name + "' field. Default value " + limit_lines
+             + " will be used.");
+        }
+
+        var limit_chars = ctx[this.LIMIT_CHARS_CONTEXT_KEY]*1
+        if (!limit_chars){
+            limit_chars = this.LIMIT_CHARS_DEFAULT;
+            console.log("No default values found for limit chars in '"
+             + this.name + "' field. Default value " + limit_chars
+             + " will be used.");
+        }
+
+        var value = $textarea.val();
+        var lines = value.split("\n");
+        if (lines.length > limit_lines){
+            $textarea.val(lines.slice(0, limit_lines).join("\n"));
+        }
+        if (value.length > limit_chars){
+            $textarea.val(value.slice(0, limit_chars));
+        }
+        this.$el.find('span.length_limit').html(value.length + '/' + limit_chars);
+    },
+
+    initialize_content: function() {
+        return this._super();
+    },
+
+    store_dom_value: function () {
+        this.limit_value(this.$textarea);
+        return this._super();
+    },
+});
+
+instance.web.form.widgets.add('text_limited',
+    'instance.web_text_widget.FieldTextLimited');
+};

web_text_widget/static/src/xml/text_limited.xml

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+<?xml version='1.0' encoding='UTF-8' ?>
+<templates id="template" xml:space="preserve">
+<t t-extend="FieldText">
+    <t t-jquery=".oe_form_field_text" t-operation="append">
+        <span class="length_limit"></span>
+    </t>
+</t>
+</templates>