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DOM element getter component, refs #66
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| if typeof process is 'object' and process.title is 'node' | ||
| # TODO: Use jsdom to make DOM components work also on Node | ||
| return | ||
| else | ||
| getelement = require 'noflo/components/GetElement.js' | ||
| socket = require 'noflo/lib/InternalSocket.js' | ||
|
|
||
| describe 'GetElement component', -> | ||
| c = null | ||
| ins = null | ||
| selector = null | ||
| element = null | ||
| error = null | ||
| beforeEach -> | ||
| c = getelement.getComponent() | ||
| ins = socket.createSocket() | ||
| selector = socket.createSocket() | ||
| element = socket.createSocket() | ||
| error = socket.createSocket() | ||
| c.inPorts.in.attach ins | ||
| c.inPorts.selector.attach selector | ||
| c.outPorts.element.attach element | ||
|
|
||
| describe 'with non-matching query', -> | ||
| it 'should throw an error when ERROR port is not attached', -> | ||
| chai.expect(-> selector.send 'Foo').to.throw Error | ||
| it 'should transmit an Error when ERROR port is attached', (done) -> | ||
| error.once 'data', (data) -> | ||
| chai.expect(data).to.be.an.instanceof Error | ||
| done() | ||
| c.outPorts.error.attach error | ||
| selector.send 'Foo' | ||
|
|
||
| describe 'with invalid query', -> | ||
| it 'should throw an error when ERROR port is not attached', -> | ||
| chai.expect(-> ins.send {}).to.throw Error | ||
| it 'should transmit an Error when ERROR port is attached', (done) -> | ||
| error.once 'data', (data) -> | ||
| chai.expect(data).to.be.an.instanceof Error | ||
| done() | ||
| c.outPorts.error.attach error | ||
| ins.send {} | ||
|
|
||
| describe 'with invalid container', -> | ||
| it 'should throw an error when ERROR port is not attached', -> | ||
| chai.expect(-> ins.send {}).to.throw Error | ||
| it 'should transmit an Error when ERROR port is attached', (done) -> | ||
| error.once 'data', (data) -> | ||
| chai.expect(data).to.be.an.instanceof Error | ||
| done() | ||
| c.outPorts.error.attach error | ||
| ins.send {} | ||
|
|
||
| describe 'with matching query without container', -> | ||
| it 'should send the matched element to the ELEMENT port', (done) -> | ||
| query = '#fixtures .getelement' | ||
| el = document.querySelector query | ||
| element.once 'data', (data) -> | ||
| chai.expect(data.tagName).to.exist | ||
| chai.expect(data.tagName).to.equal 'DIV' | ||
| chai.expect(data.innerHTML).to.equal 'Foo' | ||
| chai.expect(data).to.equal el | ||
| done() | ||
| selector.send query | ||
|
|
||
| describe 'with matching query with container', -> | ||
| it 'should send the matched element to the ELEMENT port', (done) -> | ||
| container = document.querySelector '#fixtures' | ||
| el = document.querySelector '#fixtures .getelement' | ||
| element.once 'data', (data) -> | ||
| chai.expect(data.tagName).to.exist | ||
| chai.expect(data.tagName).to.equal 'DIV' | ||
| chai.expect(data.innerHTML).to.equal 'Foo' | ||
| chai.expect(data).to.equal el | ||
| done() | ||
| ins.send container | ||
| selector.send '.getelement' |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,45 @@ | ||
| if typeof process is 'object' and process.title is 'node' | ||
| noflo = require "../../lib/NoFlo" | ||
| else | ||
| noflo = require '/noflo' | ||
|
|
||
| class GetElement extends noflo.Component | ||
| description: 'Get a DOM element matching a query' | ||
| constructor: -> | ||
| @container = null | ||
|
|
||
| @inPorts = | ||
| in: new noflo.Port 'object' | ||
| selector: new noflo.Port 'string' | ||
| @outPorts = | ||
| element: new noflo.Port 'object' | ||
| error: new noflo.Port 'object' | ||
|
|
||
| @inPorts.in.on 'data', (data) => | ||
| unless typeof data.querySelector is 'function' | ||
| @error 'Given container doesn\'t support querySelectors' | ||
| return | ||
| @container = data | ||
|
|
||
| @inPorts.selector.on 'data', (data) => | ||
| @select data | ||
|
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||
| select: (selector) -> | ||
| if @container | ||
| el = @container.querySelector selector | ||
| else | ||
| el = document.querySelector selector | ||
| unless el | ||
| @error "No element matching '#{selector}' found" | ||
| return | ||
| @outPorts.element.send el | ||
| @outPorts.element.disconnect() | ||
|
|
||
| error: (msg) -> | ||
| if @outPorts.error.isAttached() | ||
| @outPorts.error.send new Error msg | ||
| @outPorts.error.disconnect() | ||
| return | ||
| throw new Error msg | ||
|
|
||
| exports.getComponent = -> new GetElement |