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Géry Debongnie a7d2edd0c9 imp: qweb compiler now condenses whitespaces

This is a pretty big breaking change: the html output by qweb is now
different.

The main goal is to optimize the compiled templates:
- condense all consecutive whitespaces into a single spaces
- if possible, drop completely some text nodes, based on the following
  heuristic: if a text node is only composed of whitespaces, and
contains at least one linebreak, then it can be dropped.

This leads in my benchmark test to an improvement of about 10%, in
rendering speed and in memory consuption.

Note: whitespace here means anything that matches the \s regexp: newlines,
tabs, ...

close #8

2019-03-22 12:04:50 +01:00

937 B

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QWeb

QWeb is a template specification. The QWeb class in this repository is:

an implementation of the QWeb specification
which outputs a virtual dom instead of a string
and extended with a few extra directives

QWeb Specification

add here a full description of what QWeb is supposed to be, with some examples

QWeb Implementation

var qweb = new QWeb();
qweb.addTemplate("sometemplate", '<div>hello <t t-esc="name"/></div>');

// result is a vnode which represent <div>hello world</div>
result = qweb.render("sometemplate", { name: "world" });

QWeb extensions

t-on directive
t-widget, t-props, t-key
t-ref

Note on white spaces

White spaces in a templates are handled in a special way:

consecutive whitespaces are always condensed to a single whitespace
if a whitespace-only text node contains a linebreak, it is ignored
the previous rules do not apply if we are in a <pre> tag

937 B Raw Blame History