begin documenting mmm.component

8 files changed, 172 insertions, 2 deletions

diff --git a/render.moon b/render.moon
index 5284e66..4998452 100644
--- a/render.moon
+++ b/render.moon
@@ -17,6 +17,7 @@ while root\find '^%.%./'
   path = trimmed .. path
 
 root = dofile '$bundle.lua'
+assert root, "couldn't load $bundle.lua"
 root\mount path, true
 
 content, rehydrate = render root, path
diff --git a/root/meta/mmm.component/description: text$plain b/root/meta/mmm.component/description: text$plain
new file mode 100644
index 0000000..e55fcd6
--- /dev/null
+++ b/root/meta/mmm.component/description: text$plain
@@ -0,0 +1 @@
+a small and DOM-centric framework for reactive web interfaces
diff --git a/root/meta/test_mmm.component/text$moonscript -> mmm$dom.moon b/root/meta/mmm.component/tests: text$moonscript -> mmm$dom.moon
index 547b030..547b030 100644
--- a/root/meta/test_mmm.component/text$moonscript -> mmm$dom.moon
+++ b/root/meta/mmm.component/tests: text$moonscript -> mmm$dom.moon
diff --git a/root/meta/mmm.component/text$moonscript -> fn -> mmm$dom.moon b/root/meta/mmm.component/text$moonscript -> fn -> mmm$dom.moon
new file mode 100644
index 0000000..d5acc1e
--- /dev/null
+++ b/root/meta/mmm.component/text$moonscript -> fn -> mmm$dom.moon
@@ -0,0 +1,169 @@
+import article, section, h1, h2, h3, p, a, div, ul, li, pre, code from require 'mmm.dom'
+import lua, moonscript from (require 'mmm.highlighting').languages
+
+mmmcomp = -> code 'mmm.component'
+
+source = do
+  (moon_src, lua_src, demo=true) ->
+    the_code = pre (moonscript moon_src), (lua lua_src), class: 'dual-code'
+
+    return the_code unless demo
+
+    example = assert load lua_src
+    div the_code, div example!, class: 'example'
+
+=> article {
+  h1 mmmcomp!
+  p mmmcomp!, " is a small and DOM-centric framework for reactive web interfaces."
+
+  p do
+    fengari = a "fengari.io", href: '//fengari.io'
+
+    "Built for reactive UI, ", mmmcomp!, " is meant to run on the client using ", fengari, ".
+    However, like ", (code 'mmm.dom'), ", the API is supported both on the client as well as
+    on the server (were most reactive features have been omitted) so that static pre-rendered
+    content can still be generated from the same code that powers the reactive interface."
+
+  h2 "Examples"
+  p "Feel free to read the API documentation below, or take a look at the following examples using the ",
+    (code 'mmmfs'), " inspect mode:"
+
+  ul for child in *@children
+    li a (child\gett 'name: alpha'), {
+      href: child.path,
+      onclick: (e) =>
+        e\preventDefault!
+        BROWSER\navigate child.path
+    }
+
+  h2 "API"
+  p "Begin by requiring ", mmmcomp!, ". The module returns a table containing the following:"
+
+  ul {
+    li (code 'ReactiveVar'), ": class/constructor for reactive state variables.",
+    li (code 'ReactiveElement'), ": class/constructor for reactive DOM elements. Rarely used directly."
+    li (code 'elements'), ": 'magic table' containing constructors for ReactiveElements by tag name."
+    li (code 'tohtml'), ": helper to convert from ReactiveElements to mmm/dom (DOM nodes / HTML strings)"
+    li (code 'text'), ": helper to convert Lua strings to DOM Text Nodes."
+    li (code 'get_or_create'), ": helper for rehydratable views."
+  }
+
+  section do
+    rvar = -> code 'ReactiveVar'
+
+    {
+      id: 'ReactiveVar'
+
+      h3 "Reactive Variables"
+      p mmmcomp!, " is centered around the concept of Reactive Variables (", rvar!, "s).
+        A ", rvar!, " is a container for a piece of application state that other pieces of code can
+        subscribe to. These attached callbacks are invoked whenever the value changes."
+
+      p "You can instantiate a ", rvar!, " via the constructor at any time. The constructor takes
+        the initial variable as an argument, but if you omit it ", (code 'nil'), " will work fine as well.
+        After instantiation, ", (code ':get()'), " and ", (code ':set(val)'), " will give access to the value:"
+
+      source [[
+import ReactiveVar from require 'mmm.component'
+
+test = ReactiveVar 3
+print test\get! -- prints '3'
+test\set 4
+print test\get! -- prints '4'
+      ]], [[
+local ReactiveVar = require 'mmm.component'.ReactiveVar
+
+local test = ReactiveVar(3)
+print(test:get()) -- prints '3'
+test:set(4)
+print(test:get()) -- prints '4'
+      ]], false
+
+      p "The value can also be changed using ", (code ':transform(fn)'), ", which is simply a shorthand for ",
+        (code 'var:set(fn(var:get()))'), ":"
+
+      source [[
+import ReactiveVar from require 'mmm.component'
+
+add_one = (n) -> n + 1
+count = ReactiveVar 1
+
+count\transform add_one
+print test\get! -- prints '2'
+
+count\transform add_one
+print test\get! -- prints '3'
+      ]], [[
+local ReactiveVar = require 'mmm.component'.ReactiveVar
+
+local function add_one(x) return x + 1 end
+local count = ReactiveVar(1)
+
+count:transform(add_one)
+print(test:get()) -- prints '2'
+
+count:transform(add_one)
+print(test:get()) -- prints '3'
+      ]], false
+
+      p "Now, so far we haven't really seen anything useful - this is all just behaving like a normal variable.
+        The ", (code ':subscribe(callback)'), " method is what makes ", rvar!, "s interesting: Whenever the value
+        changes, the ", rvar!, " calls each of the registered handlers, passing the new as well as the previous value:"
+
+      source [[
+import ReactiveVar from require 'mmm.component'
+
+add_one = (n) -> n + 1
+count = ReactiveVar 1
+count\subscribe (new, old) ->
+  print "changing from #{old} to #{new}!"
+
+
+count\transform add_one -- changing from 1 to 2
+count\set "a string"    -- changing from 2 to a string
+      ]], [[
+local ReactiveVar = require 'mmm.component'.ReactiveVar
+
+local function add_one(x) return x + 1 end
+local count = ReactiveVar(1)
+cout:subscribe(function(new old)
+  print("changing from " .. old .. " to " .. new)
+end)
+
+count:transform(add_one) -- changing from 1 to 2
+count:set("a string")    -- changing from 2 to a string
+      ]], false
+
+      p "This allows other code (such as ", (code 'ReactiveElement'), "s) to react to value changes and update
+        themselves, as we will see in a minute. Often you will want to derive state from other state. To make this
+        easy while keeping everything reactive, ", mmmcomp!, " includes the ", (code ':map(fn)'), " method."
+
+      p (code ':map(fn)'), " applies the function ", (code 'fn'), " to the current value, just as ",
+        (code ':transform(fn)'), " would, but it doesn't update the value itself - it rather returns a new ", rvar!,
+        " instance that is already set up to update whenever the original one changes."
+
+      source [[
+import ReactiveVar from require 'mmm.component'
+
+fruit = ReactiveVar "apple"
+loud_fruit = fruit\map string.upper
+
+print fruit\get!      -- prints 'apple'
+print loud_fruit\get! -- prints 'APPLE'
+
+fruit\set "orange"
+print loud_fruit\get! -- prints 'ORANGE'
+      ]], [[
+local ReactiveVar = require 'mmm.component'.ReactiveVar
+
+local fruit = ReactiveVar("apple")
+local loud_fruit = fruit:map(string.upper)
+
+print(fruit:get())      -- prints 'apple'
+print(loud_fruit:get()) -- prints 'APPLE'
+
+fruit:set("orange")
+print(loud_fruit:get()) -- prints 'ORANGE'
+      ]], false
+    }
+}
diff --git a/root/meta/todo/description: text$plain b/root/meta/mmm.component/todoMVC/description: text$plain
index baaf6fc..baaf6fc 100644
--- a/root/meta/todo/description: text$plain
+++ b/root/meta/mmm.component/todoMVC/description: text$plain
diff --git a/root/meta/todo/text$moonscript -> mmm$component.moon b/root/meta/mmm.component/todoMVC/text$moonscript -> mmm$component.moon
index dc4e5e1..dc4e5e1 100644
--- a/root/meta/todo/text$moonscript -> mmm$component.moon
+++ b/root/meta/mmm.component/todoMVC/text$moonscript -> mmm$component.moon
diff --git a/root/meta/mmm.dom/text$moonscript -> mmm$dom.moon b/root/meta/mmm.dom/text$moonscript -> mmm$dom.moon
index 1479c00..090b53b 100644
--- a/root/meta/mmm.dom/text$moonscript -> mmm$dom.moon
+++ b/root/meta/mmm.dom/text$moonscript -> mmm$dom.moon
@@ -1,4 +1,4 @@
-import article, h1, h2, p, a, span, div, pre, code from require 'mmm.dom'
+import article, h1, h2, p, a, div, pre, code from require 'mmm.dom'
 import lua, moonscript from (require 'mmm.highlighting').languages
 
 mmmdom = -> code 'mmm.dom'
diff --git a/root/meta/test_mmm.component/description: text$plain b/root/meta/test_mmm.component/description: text$plain
deleted file mode 100644
index 691fea5..0000000
--- a/root/meta/test_mmm.component/description: text$plain
+++ /dev/null
@@ -1 +0,0 @@
-Tests for mmm.component