refactor: split API and serialization logic (#62)

BREAKING CHANGE: `addHeading`, `addList` and `addParagraph` are no longer available on `TextDocument` but are added to the `TextBody` which can be retrieved from the document (`getBody`).

The code was largely restructured: The domain model classes (except for the style stuff) were moved to `/api` and the DOM generation is placed in `/xml`. The styles will get some extra love as soon as common styles will be implemented and thus are excluded for now.

All tests are placed next to their corresponding classes.

Except for the styles, the public API now is fluent and its documentation follows the same pattern and includes examples.

Fixes: #60

.gitignore

@@ -3,6 +3,6 @@ coverage/
 examples/
 lib/
 node_modules/
-test/example
+example.spec.ts
 
 TODO.md

CHANGELOG.md

@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ### Changed
 - **meta:** Use `Date` instead of `number` when dealing with dates
 - **chore:** Update dev dependencies, place test code next to production code, mention contributors in package.json
+- **refactor:** Split API and serialization logic, closes [#60](https://github.com/connium/simple-odf/issues/60)
 
 ## [0.6.0] (2018-10-12)
 ### Added

README.md

@@ -22,14 +22,15 @@ Create your first document.
 const simpleOdf = require("simple-odf");
 
 const document = new simpleOdf.TextDocument();
+const body = document.getBody();
 
-const image = document.addParagraph().addImage("/home/homer/myself.png");
+const image = body.addParagraph().addImage("/home/homer/myself.png");
 image.getStyle().setAnchorType(simpleOdf.AnchorType.AsChar);
 image.getStyle().setSize(29.4, 36.5);
 
-document.addHeading("Welcome to simple-odf");
+body.addHeading("Welcome to simple-odf");
 
-const p1 = document.addParagraph("The quick, brown fox jumps over a lazy dog.");
+const p1 = body.addParagraph("The quick, brown fox jumps over a lazy dog.");
 p1.addText("\nThe five boxing wizards jump quickly.\n\n");
 p1.addHyperlink("Visit me", "http://example.org/");
 const style1 = new simpleOdf.ParagraphStyle();
@@ -45,15 +46,15 @@ style1.setKeepTogether();
 p1.setStyle(style1);
 // font usage
 document.declareFont("Open Sans", "Open Sans", simpleOdf.FontPitch.Variable);
-const p2 = document.addParagraph("It always seems impossible until it's done.");
+const p2 = body.addParagraph("It always seems impossible until it's done.");
 const style2 = new simpleOdf.ParagraphStyle();
 style1.setFontName("Open Sans");
 
-document.addHeading("Credits", 2);
+body.addHeading("Credits", 2);
 
-document.addParagraph("This was quite easy. Do you want to know why?");
+body.addParagraph("This was quite easy. Do you want to know why?");
 
-const list = document.addList();
+const list = body.addList();
 list.addItem("one-liner setup");
 list.addItem("just write like you would do in a full-blown editor");