[Feature] Create default Styler for attributed string rendering (#177)

* Add stubs

* Add some helper methods

* Add very basic styling

* Add custom dynamic type for code

* Clean up

* Allow DebugVisitor methods to be overridden

* Add method to calculate list depth

* Pass the list nest depth to the styler

* Move nest depth property to base node

* Add helper to get parent

* Add property to check for top level paragraphs

* Add test

* Pass top level flag to paragraph styler

* Only add pargraph style for top level paragraphs

* Create ListItemPrefixGenerator

* Use list item prefix generator

* Fix debug description

* WIP: list item styling

* Add tests

* Tidy up

* Use paragraph separator code point

* Add list markers

* Add todo

* Add tests

* Tidy up

* Calculate ranges of paragraphs excluding lists

* Add item styling stubs

* Format indentation of nested liists

* Refactor item styling

* Return self if prefix length exceeds bounds

* Add spacing after heading

* Tidy up

* Add todo

* Organize tests

* Rename method

* Add test stubs

* Add tests

* Reorganize files

* Add tests

* Loosen coupling between List and ListItemPrefixGenerator

* Add snapshot testing framework

* Bump minimum deployment to iOS 10 for test target

* Refactor FontBook into FontCollection

* Inject fonts into DefaultStyler

* Create ParagraphStyleCollection & inject into DefaultStyler

* Tidy up

* Create ColorCollection & inject into Default Styler

* Style block quote

* Style code blocks

* Add colors to headings, text and inline code

* Move AttributeCollection into new file

* Organize file structure

* Rename item paragraph styler

* Style list item prefix in the styler

* Make ListItemParagraphStyler configurable

* Add base test suite for styler

* Tidy up

* Add test stubs for list items

* Fix prefix indentation

* Add item prefix tests

* Allow styler properties to be externally configured

* Refactor styler test suite

* Make ListItemParargraphStyler a class

* Clean up

* Add new item styling tests

* Ignore some test stubs

* Use snapshots for visitor tests

* Add snapshots for strong, emphasized, code and html styles

* Clean up

* Explicitly set point size after adding font trait

* Add monospace trait to font extension

* Allow monospace font in headings

* Use heading level when styling

* Make test properties private

* Add heading style tests

* Add todos

* Use line separators in code blocks

* Add code paragraph style

* Add support for custom thematic break attribute

* Add DownTextView

* Add thematic break to color collection

* Add test for thematic break style

* Append newline instead of line separator after thematic break

* Add support for custom quote stripe attribute

* Translate thematic break rect to container origin

* Translate stripe by container origin

* Clean up

* Remove insets property & use origin parameter

* Clean up

* Add quote stripe options

* Move list item options to new file

* Add quote styling tests

* Allow thematic break to be configured

* Test thematic break preservation in block quote

* Add todos

* Add some more extension methods

* Add support for rendering quotes in a list

* Incrementally indent list items

* Fix quote indentation in list item

* Rename methods

* Clean up

* Add test

* Fix line break after code blocks

* Add code block style tests

* Add assert helper

* Clean up tests

* Set text container inset before fitting size to content

* Extract DownDebugLayoutManager and DownDebugTextView

* Allow snapshots to show line fragments

* Add color to links

* Add link style tests

* Clean up file structure

* Remove redundant imports

* Clean up file structure

* Fix DownTextView init

* Draw line fragments in DownDebugLayoutManager

* Add debug style tests

* Clean up file structure

* Remove isTopLevel from Paragraph

* Remove nestDepth from list item

* Remove unused extension method

* Remove unused attribute keys

* Provide public init for ThematicBreakOptions

* Move max prefix width calculation to ListItemParagraphStyler

* Rename DefaultStyler to DownStyler

* Extract styles into a configuration struct

* Clean up

* Clean up

* Remove AttributeCollection

* Remove color from QuoteStripeOptions

* Clean up

* Remove defaults from custom attributes

* Render markdown within DownTextView

* Fix quote stripe rendering

* Revert "Fix quote stripe rendering"

This reverts commit 72f7783.

* Tidy up

* Enrich code blocks with background color

* Remove redundant initializers

* Add CodeBlockOptions

* Clean up

* Make extension local and private

* Remove some duplication

* Rename method

* Move non private extensions into new files

* Remove duplication

* Clean up

* Add tests

* Rename method

* Add tests

* Fix prefix  generation

* Add tests

* File organization

* Add tests

* Clean up

* Remove duplicate comment

* Flatten code & html block descriptions into single line

* Add tests

* Clean up

* Remove dynamic fonts

* Initial steps to support macOS & tvOS

* Rename font traits

* Further support for macOS

* Clean up

* Use iPhone Xs simulator when testings on Travis

* Clean up old todos

* Add Styler documentation

* Add documentation

* Make setter private

* Remove duplication

* Fix typo

* Name magic numbers

* Make FontCollection and ColorCollection protocols

* Return self instead of nil

* Mark feature unavailable for watchOS

* Update to snapshot testing 1.6

* Check in snapshot testing framework for iOS

* Re-record list item snapshots

* Remove old TODO

* Fix compiler error for macOS

* Compile snapshot tests for iOS only

* Specify Xcode 11 for CI

* Move snapshot tests into separate test target

* Revert "Compile snapshot tests for iOS only"

This reverts commit 95b2bf1.

* Run snapshot tests on CI

* Fix travis config

* Fix travis config again

* Fix missing file error

* Re-record snapshots on iPhone 11

* Update travis config

* slather DownShapshotTests

* Provide explicit types in styler configuration

* [Copyright] Update org name and years

* [CI] Try using Codecov for merged reports

* [Travis] Try doing Codecov after each slather

* [Xcode] Share DownSnapshotTests scheme w/ code coverage

* [CI] Use separate codecov report dirs

* [CI] Don't slather, just use codecov

.gitignore

@@ -1,10 +1,10 @@
+Carthage/Checkouts/
 Pods/
 .build/
 .DS_Store
 xcuserdata
 
 # additional ignores that will save us time
-build/
 *.pbxuser
 !default.pbxuser
 *.mode1v3

.travis.yml

@@ -1,12 +1,12 @@
-osx_image: xcode10.2
+osx_image: xcode11
 language: objective-c
 before_install:
   - set -o pipefail
-  - gem install xcpretty slather -N
-  - xcrun simctl boot "iPhone 7" || echo "(Pre)Launched the simulator."
+  - xcrun simctl boot "iPhone 11" || echo "(Pre)Launched the simulator."
 script:
-  - travis_retry xcodebuild -project Down.xcodeproj -scheme "Down" -destination "platform=iOS Simulator,name=iPhone 7" -enableCodeCoverage YES ONLY_ACTIVE_ARCH=YES test | xcpretty -c
-  - travis_retry xcodebuild -project Down.xcodeproj -scheme "Down" -sdk macosx -destination 'platform=OS X,arch=x86_64' -enableCodeCoverage YES test | xcpretty -c
-  - travis_retry xcodebuild -project Down.xcodeproj -scheme "Down" -sdk appletvsimulator -destination 'platform=tvOS Simulator,name=Apple TV' -enableCodeCoverage YES test | xcpretty -c
+  - travis_retry xcodebuild -project Down.xcodeproj -scheme "Down" -sdk iphonesimulator -destination "platform=iOS Simulator,OS=13.0,name=iPhone 11" -enableCodeCoverage YES ONLY_ACTIVE_ARCH=YES test
+  - travis_retry xcodebuild -project Down.xcodeproj -scheme "Down" -sdk macosx -destination 'platform=OS X,arch=x86_64' -enableCodeCoverage YES test
+  - travis_retry xcodebuild -project Down.xcodeproj -scheme "Down" -sdk appletvsimulator -destination 'platform=tvOS Simulator,name=Apple TV' -enableCodeCoverage YES test
+  - travis_retry xcodebuild -project Down.xcodeproj -scheme "DownSnapshotTests" -sdk iphonesimulator -destination "platform=iOS Simulator,OS=13.0,name=iPhone 11" -enableCodeCoverage YES ONLY_ACTIVE_ARCH=YES test
 after_success:
-  - slather coverage --ignore "../**/*/Xcode*" --ignore "Source/cmark/*" --scheme "Down" Down.xcodeproj
+  - bash <(curl -s https://codecov.io/bash)

Cartfile.private

@@ -0,0 +1 @@
+github "pointfreeco/swift-snapshot-testing" ~> 1.6

Cartfile.resolved

@@ -0,0 +1 @@
+github "pointfreeco/swift-snapshot-testing" "1.6.0"