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Added slots & changed simple_components tags
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‎README.md‎

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If you choose not use it as a built-in, you will need to add `{% load simple_components %}` to the top of your template whenever you want to use simple components.
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### 2. Create component inside your template:
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You can define a base component that can be reused later. For example:
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```html
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{% load simple_components %}
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{% set_component "first_component" %}
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{% #set_component "card" %}
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<div class="card">
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<h3>{{ title }}</h3>
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<p>{{ description }}</p>
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</div>
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{% end_set_component %}
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{% /set_component %}
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<div class="card-list">
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{% component "first_component" title="Hello world!" description="Some text..." %}
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{% component "first_component"
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title="Some lines"
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description="Other text..."
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%}
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{% with value="this text will be capitalized later" %}
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{% component "first_component" title=123 description=value|capfirst %}
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{% endwith %}
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{% component "card" title="Post 1" description="..." %}
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{% component "card" title="Post 2" description="..." %}
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{% component "card" title="Post 3" description="..." %}
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</div>
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```
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You can also use named slots to change the contents of a component as quickly as possible:
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```html
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{% load simple_components %}
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{% #set_component "profile" %}
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<div class="profile">
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<div class="avatar">
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{% @set_slot "avatar" %}
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<!-- fallback username as bdage -->
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<span class="badge">{{ username.0 }}</span>
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{% /set_slot %}
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</div>
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<div class="info">
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{{ username }}
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</div>
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</div>
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{% /set_component %}
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{% #set_component "card" %}
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<div class="card">
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{% set_slot "image" %}
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<h3>{{ title }}</h3>
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<p>{{ description }}</p>
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</div>
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{% /set_component %}
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<div class="page">
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{% component "profile" username="Default" %}
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<div class="card-list">
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{% #component "card" title="Post 1" description="..." %}
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{% @slot "image" %}
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<img src="..." alt="slot image" />
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{% /slot %}
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{% /component %}
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</div>
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</div>
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```
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### 3. Hooray! Everything is ready to use it.
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## Template syntax
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### Create component
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To define a component you need to use the Django tag `{# set_component name %}` where name is the name of the component,
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listed in quotes. This is a paired tag, which means it needs to be closed:
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```html
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{% #set_component "card" %}
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<p>{{ title }}</p>
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{% /set_component %}
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```
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### Use component
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In the example above, we defined the "card" component and specified a variable that will be used during rendering later.
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Now, to use this component, you just need to write:
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```html
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{% component "card" title="Post" %}
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```
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Components can also render children - anything specified between the opening and closing `component` tags:
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```html
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{% #set_component "card" %}
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<div class="c1 c2 c3 c4 c5">
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<p>{{ title }}</p>
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{{ children }}
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</div>
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{% /set_component %}
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{% #component "card" title="Post" %}
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<p>Simple</p>
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<p>Content</p>
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{% /component %}
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```
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### Create slots
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Slots are a powerful opportunity to upgrade your components! Slots can accept any content.
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Each slot has a name, and is specified inside the set_component tag:
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```html
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{% #set_component "card" %}
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<div class="card">
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<div class="card-header">
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<h3>{{ title }}</h3>
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</div>
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<div class="card-body">
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{% set_slot "body" %}
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</div>
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</div>
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{% /set_component %}
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```
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Any slot can have a fallback template, which will be displayed if this slot was not passed to the component.
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Otherwise, a `SlotNotFoundError` will be raised:
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```html
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{% @set_slot "custom" %}
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fallback
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{% /set_slot %}
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```
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### Use slots
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To use slots in components, you need to pass the slot when rendering where it is needed:
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```html
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{% #set_component "card" %}
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<div class="card">
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...
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<div class="card-body">
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{% set_slot "body" %}
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</div>
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</div>
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{% /set_component %}
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{% #component "card" %}
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{% @slot "body" %}
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render slot inside card-body class
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{% /slot %}
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{% /component %}
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```
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### Summarize
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All paired tags in simple components close with `%{ /tag %}`, where `tag` can be `set_component`, `set_slot`, `component`.
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There are `{% component %}` and `{% set_slot %}` which can be defined on the same line. For the component,
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this means that it cannot use slots and children. For `set_slot` this means that the fallback template is not specified:
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```html
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{% component "card" title="Post" description="..." %}
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```
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```html
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{% set_slot "avatar" %}
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```
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To define a component or use it, you can specify `#` at the beginning of the tag (only for closable tags):
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```html
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{% #set_component name="simple" %}
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{{ children }}
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{% /set_component %}
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```
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```html
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{% #component name="simple" %}
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component with children content
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{% /component %}
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```
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To define a slot or use it, you can specify `@` at the beginning of the tag (only for closable tags):
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```html
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{% @set_slot "custom" %}
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fallback
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{% /set_slot %}
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```
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```html
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{% @slot "custom" %}
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render slot
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{% /slot %}
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```
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## Contributing
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If you would like to suggest a new feature, you can create an issue on the GitHub repository for this project.
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Also you can fork the repository and submit a pull request with your changes.

‎simple_components/exceptions.py‎

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from django import template
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class SetComponentNameError(template.TemplateSyntaxError):
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pass
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class ComponentNameError(template.TemplateSyntaxError):
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pass
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class ComponentArgsError(template.TemplateSyntaxError):
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pass
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class ComponentNotDefined(template.TemplateSyntaxError):
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pass
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class TagNameRequiredError(template.TemplateSyntaxError):
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def __init__(self, tag_name, example):
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self.message = '\'%s\' takes at least one required argument "name":\n%s' % (
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tag_name,
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example,
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)
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super().__init__(self.message)
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class TagPropsArgumentError(template.TemplateSyntaxError):
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def __init__(self, bit, example):
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self.message = 'Argument %s must be takes as params:\n%s' % (bit, example)
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super().__init__(self.message)
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class TagPropsChildrenError(template.TemplateSyntaxError):
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def __init__(self, name):
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self.message = (
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'The parameter \'%s\' cannot be specified in props because it is built-in '
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'and cannot be overridden in this way.' % name
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)
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super().__init__(self.message)
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class ComponentNotFoundError(template.TemplateSyntaxError):
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def __init__(self, name):
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self.message = (
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'The component \'%s\' has not been previously defined. '
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'Check that the component is named correctly.' % name
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)
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super().__init__(self.message)
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class SlotNotFoundError(template.TemplateSyntaxError):
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def __init__(self, name, *args):
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self.message = 'Expected slot with name \'%s\'!' % name
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super().__init__(self.message)

‎simple_components/templates/simple_components/base.html‎

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{% load simple_components %}
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{% #set_component "card" %}
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<div class="card">
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<h3>{{ title }}</h3>
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<p>{{ description }}</p>
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</div>
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{% /set_component %}
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<div class="card-list">
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{% component "card" title="Post 1" description="..." %}
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{% component "card" title="Post 2" description="..." %}
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{% component "card" title="Post 3" description="..." %}
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</div>

‎simple_components/templates/simple_components/example.html‎

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This file was deleted.

‎simple_components/templates/simple_components/slots.html‎

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{% load simple_components %}
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{% #set_component "profile" %}
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<div class="profile">
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<div class="avatar">
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{% @set_slot "avatar" %}
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<!-- fallback username as bdage -->
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<span class="badge">{{ username.0 }}</span>
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{% /set_slot %}
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</div>
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<div class="info">
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{{ username }}
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</div>
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</div>
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{% /set_component %}
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{% #set_component "card" %}
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<div class="card">
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{% set_slot "image" %}
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<h3>{{ title }}</h3>
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<p>{{ description }}</p>
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</div>
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{% /set_component %}
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<div class="page">
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{% component "profile" username="Default" %}
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<div class="card-list">
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{% #component "card" title="Post 1" description="..." %}
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{% @slot "image" %}
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<img src="..." alt="slot image" />
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{% /slot %}
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{% /component %}
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</div>
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</div>

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