[Toaster] [PATCH] toaster: disable/enable "Add layer" button according to input's content

[Joshua G Lock]

Hi Elliot,

On Wed, 2016-03-30 at 10:10 +0100, Elliot Smith wrote:
> In the import layer page, the "Add layer" button in the layer
> dependencies
> section doesn't accurately reflect whether the layer name in the
> corresponding input can be added. A partial or empty layer name can
> leave the button active, such that when it is clicked, a
> previously-selected layer can be accidentally added.
> 
> Fix by keeping track of the items currently available in the
> typeahead,
> only activating the "Add layer" button when the input matches the
> name
> of one of those items.

I tried your patch out and it seems to work nicely.

The only minor surprise is that if I select a matched layer from the
typeahead, then change my mind and begin deleting that layer text the
Add button remains active (with the same selection) until I've
completely deleted from the layer name field.

Is it possible to unselect from the typeahead when deletion begins?

Regards,

Joshua

> 
> [YOCTO #8511]
> 
> Signed-off-by: Elliot Smith <elliot.smith at intel.com>
> ---
>  .../toaster/toastergui/static/js/importlayer.js    | 30
> +++++++++++++++++++++-
>  .../lib/toaster/toastergui/static/js/libtoaster.js |  5 ++++
>  2 files changed, 34 insertions(+), 1 deletion(-)
> 
> diff --git a/bitbake/lib/toaster/toastergui/static/js/importlayer.js
> b/bitbake/lib/toaster/toastergui/static/js/importlayer.js
> index c68f366..5a59799 100644
> --- a/bitbake/lib/toaster/toastergui/static/js/importlayer.js
> +++ b/bitbake/lib/toaster/toastergui/static/js/importlayer.js
> @@ -18,10 +18,38 @@ function importLayerPageInit (ctx) {
>  
>    libtoaster.makeTypeahead(layerDepInput,
> libtoaster.ctx.layersTypeAheadUrl, { include_added: "true" },
> function(item){
>      currentLayerDepSelection = item;
> +  });
> +
> +  // choices available in the typeahead
> +  var layerDepsChoices = {};
> +
> +  // when the typeahead choices change, store an array of the
> available layer
> +  // choices locally, to use for enabling/disabling the "Add layer"
> button
> +  layerDepInput.on("typeahead-choices-change", function (event,
> data) {
> +    layerDepsChoices = {};
>  
> -    layerDepBtn.removeAttr("disabled");
> +    if (data.choices) {
> +      data.choices.forEach(function (item) {
> +        layerDepsChoices[item.name] = item;
> +      });
> +    }
>    });
>  
> +  // disable the "Add layer" button when the layer input typeahead
> is empty
> +  // or not in the typeahead choices
> +  layerDepInput.on("input change", function () {
> +    // get the choices from the typeahead
> +    var choice = layerDepsChoices[$(this).val()];
> +
> +    if (choice) {
> +      layerDepBtn.removeAttr("disabled");
> +      currentLayerDepSelection = choice;
> +    }
> +    else {
> +      layerDepBtn.attr("disabled", "disabled");
> +      currentLayerDepSelection = undefined;
> +    }
> +  });
>  
>    /* We automatically add "openembedded-core" layer for convenience
> as a
>     * dependency as pretty much all layers depend on this one
> diff --git a/bitbake/lib/toaster/toastergui/static/js/libtoaster.js
> b/bitbake/lib/toaster/toastergui/static/js/libtoaster.js
> index b6b49b6..0e81f67 100644
> --- a/bitbake/lib/toaster/toastergui/static/js/libtoaster.js
> +++ b/bitbake/lib/toaster/toastergui/static/js/libtoaster.js
> @@ -21,6 +21,9 @@ var libtoaster = (function (){
>      var xhrReq;
>  
>      jQElement.typeahead({
> +        // each time the typeahead's choices change, a
> +        // "typeahead-choices-change" event is fired with an object
> +        // containing the available choices in a "choices" property
>          source: function(query, process){
>            xhrParams.search = query;
>  
> @@ -36,6 +39,8 @@ var libtoaster = (function (){
>  
>              xhrReq = null;
>  
> +            jQElement.trigger("typeahead-choices-change", {choices:
> data.results});
> +
>              return process(data.results);
>            });
>          },
> -- 
> 1.9.3
> 
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