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Track scroll direction to reset index cache

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squidfunk 2017-01-22 13:01:57 +01:00 committed by Martin Donath
parent 680725ed3a
commit 32ffc58d12
3 changed files with 20 additions and 8 deletions
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10
material/assets/javascripts/application-16f434a21a.js → material/assets/javascripts/application-eb5283d5b7.js
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File diff suppressed because one or more lines are too long

4
material/base.html
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@ -31,7 +31,7 @@
{% endif %}
{% endblock %}
{% block libs %}
<script src="{{ base_url }}/assets/javascripts/modernizr-0d3dc73294.js"></script>
<script src="{{ base_url }}/assets/javascripts/modernizr-facb31f4a3.js"></script>
{% endblock %}
{% block fonts %}
{% if config.extra.font != "none" %}
@ -124,7 +124,7 @@
{% endblock %}
</div>
{% block scripts %}
<script src="{{ base_url }}/assets/javascripts/application-16f434a21a.js"></script>
<script src="{{ base_url }}/assets/javascripts/application-eb5283d5b7.js"></script>
<script>var config={url:{base:"{{ base_url }}"}},app=new Application(config);app.initialize()</script>
{% for path in extra_javascript %}
<script src="{{ path }}"></script>

14
src/assets/javascripts/components/Material/Nav/Blur.js
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@ -41,6 +41,9 @@ export default class Blur {
this.index_ = 0
this.offset_ = window.pageYOffset
/* Necessary state to correctly reset the index */
this.dir_ = 0
/* Index anchor node offsets for fast lookup */
this.anchors_ = [].map.call(this.els_, el => {
return document.getElementById(el.hash.substring(1))
@ -62,6 +65,14 @@ export default class Blur {
*/
update() {
const offset = window.pageYOffset
const dir = Math.sign(this.offset_ - offset)
/* Hack: reset index if direction changed, to catch very fast scrolling,
because otherwise we would have to register a timer and that sucks */
if (this.dir_ !== dir)
this.index_ = dir < 0
? this.index_ = 0
: this.index_ = this.els_.length - 1
/* Exit when there are no anchors */
if (this.anchors_.length === 0)
@ -92,8 +103,9 @@ export default class Blur {
}
}
/* Remember current offset for next iteration */
/* Remember current offset and direction for next iteration */
this.offset_ = offset
this.dir_ = dir
}
/**