pre-commit - add markdownlint-cli2 checking

Run markdownlint-cli2 on markdown files.
mostly whitespace and line-length (100 char) changes.

.markdownlint.json

@@ -0,0 +1,16 @@
+{
+    "default": true,
+    "MD007": {
+        "indent": 2,
+        "start_indented": false
+    },
+    "MD013": {
+        "line_length": 100,
+        "tables": false,
+        "code_blocks": false
+    },
+    "MD029": {
+        "style": "ordered"
+    },
+    "MD033": false
+}

.pre-commit-config.yaml

@@ -33,3 +33,9 @@ repos:
   hooks:
   - id: reuse
     args: [--suppress-deprecation]
+- repo: https://github.com/DavidAnson/markdownlint-cli2
+  rev: v0.12.0
+  hooks:
+  - id: markdownlint-cli2
+    files: \.(md|mdown|markdown)$
+    exclude: (docs/api/docs/license.md)

README.md

@@ -1,68 +1,74 @@
-KDBindings
-==========
+# KDBindings
+
 Reactive programming & data binding in C++
 
 From plain C++ you get:
 
- * Signals + Slots.
- * Properties templated on the contained type.
- * Property bindings allowing reactive code to be written without having to do all the low-level, error prone plumbing by hand.
- * Lazy evaluation of property bindings.
- * No more broken bindings.
- * Totally stand-alone "header-only" library. No heavy Qt dependency.
- * Can still be used with Qt if you so wish.
+* Signals + Slots.
+* Properties templated on the contained type.
+* Property bindings allowing reactive code to be written without having to do all the low-level,
+  error prone plumbing by hand.
+* Lazy evaluation of property bindings.
+* No more broken bindings.
+* Totally stand-alone "header-only" library. No heavy Qt dependency.
+* Can still be used with Qt if you so wish.
+
+## Using KDBindings
 
-Using KDBindings
-================
 KDBindings requires a C++ compiler with C++17 support.
 
 Find more information at:
 
- * [detailed browsable API reference](https://kdab.github.io/KDBindings/md__home_runner_work_KDBindings_KDBindings_docs_api_docs_getting_started_index.html)
- * [our assorted example programs](https://github.com/KDAB/KDBindings/blob/main/examples)
+* [detailed browsable API reference](https://kdab.github.io/KDBindings/md__home_runner_work_KDBindings_KDBindings_docs_api_docs_getting_started_index.html)
+* [our assorted example programs](https://github.com/KDAB/KDBindings/blob/main/examples)
 
-Compatibility with Qt
-=====================
-Because Qt defines `emit` as a keyword, Qt is by default incompatible with KDBindings, which uses `emit` as a function name.
+## Compatibility with Qt
 
-This can only be fixed by defining `QT_NO_EMIT` or `QT_NO_KEYWORDS` and simply omitting `emit` in your Qt code.
+Because Qt defines `emit` as a keyword, Qt is by default incompatible with KDBindings, which
+uses `emit` as a function name.
 
-To make this easy, KDBindings includes a CMake option: `KDBindings_QT_NO_EMIT`, which defines this for all dependents of KDBindings.
+This can only be fixed by defining `QT_NO_EMIT` or `QT_NO_KEYWORDS` and simply omitting
+`emit` in your Qt code.
+
+To make this easy, KDBindings includes a CMake option: `KDBindings_QT_NO_EMIT`, which defines this
+for all dependents of KDBindings.
 
 See also: [#79](https://github.com/KDAB/KDBindings/issues/79)
 
-Contact
-=======
-* Visit us on GitHub: https://github.com/KDAB/KDBindings
-* Email [email protected] for questions about copyright, licensing or commercial support.
+## Contact
+
+* Visit us on GitHub: <https://github.com/KDAB/KDBindings>
+* Email <[email protected]> for questions about copyright, licensing or commercial support.
 
 Stay up-to-date with KDAB product announcements:
 
 * [KDAB Newsletter](https://news.kdab.com)
 * [KDAB Blogs](https://www.kdab.com/category/blogs)
 * [KDAB on Twitter](https://twitter.com/KDABQt)
 
-Licensing
-=========
+## Licensing
+
 KDBindings is © Klarälvdalens Datakonsult AB and available under the terms of
 the [MIT](https://github.com/KDAB/KDBindings/blob/main/LICENSES/MIT.txt) license.
 
 Contact KDAB at <[email protected]> if you need different licensing options.
 
 KDBindings includes these source files, also available under the terms of the MIT license:
 
-* [doctest.h](https://github.com/onqtam/doctest) - the lightest feature-rich C++ single-header testing framework for unit tests and TDD (C) 2016-2021 Viktor Kirilov <[email protected]>
-* [genindex_array.h](https://gist.github.com/jaburns/ca72487198832f6203e831133ffdfff4) (C) 2021 Jeremy Burns (adapted by KDAB for KDBindings)
+* [doctest.h](https://github.com/onqtam/doctest) - the lightest feature-rich C++ single-header
+  testing framework for unit tests and TDD (C) 2016-2021 Viktor Kirilov <[email protected]>
+* [genindex_array.h](https://gist.github.com/jaburns/ca72487198832f6203e831133ffdfff4)
+  (C) 2021 Jeremy Burns (adapted by KDAB for KDBindings)
+
+## Get Involved
 
-Get Involved
-============
 Please submit your contributions or issue reports from our GitHub space at
-https://github.com/KDAB/KDBindings
+<https://github.com/KDAB/KDBindings>.
+
+Contact <[email protected]> for more information.
 
-Contact [email protected] for more information.
+## About KDAB
 
-About KDAB
-==========
 KDBindings is supported and maintained by Klarälvdalens Datakonsult AB (KDAB).
 
 The KDAB Group is the global No.1 software consultancy for Qt, C++ and
@@ -74,4 +80,4 @@ We continue to help develop parts of Qt and are one of the major contributors
 to the Qt Project. We can give advanced or standard trainings anywhere
 around the globe on Qt as well as C++, OpenGL, 3D and more.
 
-Please visit https://www.kdab.com to meet the people who write code like this.
+Please visit <https://www.kdab.com> to meet the people who write code like this.

docs/api/docs/getting-started/data-binding.md

@@ -1,17 +1,23 @@
 # Data Binding
 
-[Data Binding](https://en.wikipedia.org/wiki/Data_binding), or [Property Binding](https://doc.qt.io/qt-5/qtqml-syntax-propertybinding.html) in Qt terminology, is a programming paradigm that allows binding of data sources to their respective consumers.
-That means that if a value depends on another, it will automatically be updated whenever the input value changes.
+[Data Binding](https://en.wikipedia.org/wiki/Data_binding), or
+[Property Binding](https://doc.qt.io/qt-5/qtqml-syntax-propertybinding.html) in Qt terminology,
+is a programming paradigm that allows binding of data sources to their respective consumers.
+That means that if a value depends on another, it will automatically be updated whenever the
+input value changes.
 
 ## Basic Data Binding in KDBindings
+
 The basis for Data Binding in KDBindings is formed by [Properties](@ref KDBindings::Property).
 
-They can be combined using arithmetic operators or just plain functions, to create new properties that are bound to the input properties.
-This means the result of the calculation will be updated automatically every time the input of the calculation changes.
+They can be combined using arithmetic operators or just plain functions, to create new properties
+that are bound to the input properties.  This means the result of the calculation will be updated
+automatically every time the input of the calculation changes.
 
 To create a binding, use the free KDBindings::makeBoundProperty function.
 
-### Example
+### Example: basic data binding
+
 ``` cpp
 #include <kdbindings/binding.h>
 
@@ -26,16 +32,19 @@ width = 5;
 std::cout << area << std::endl; // will print 15
 ```
 
-Pretty much all arithmetic operators are supported, as well as combinations of properties with constant values.
+Pretty much all arithmetic operators are supported, as well as combinations of properties with
+constant values.
 
 ## Declaring functions for use in data binding
+
 KDBindings also allows you to declare arbitrary functions as usable in the context of data binding.
 See the [`node_functions.h`](./node__functions_8h.html) file for documentation on the associated macros.
 
 This is already done for some of the `std` arithmetic functions, like abs and floor.
 You can use the KDBINDINGS_DECLARE_STD_FUNCTION macro to declare more of these when necessary.
 
-### Example
+### Example: declaring functions for data binding
+
 ``` cpp
 #include <kdbindings/binding.h>
 
@@ -46,11 +55,13 @@ Property<int> positiveValue = makeBoundProperty(abs(value));
 // positiveValue is 1
 ```
 
-
 ## Binding arbitrary functions
-KDBindings::makeBoundProperty also accepts functions as binding, so arbitrary code can be executed to produce the new property value.
 
-### Example
+KDBindings::makeBoundProperty also accepts functions as binding, so arbitrary code can be executed
+to produce the new property value.
+
+### Example: binding arbitrary functions
+
 ``` cpp
 #include <kdbindings/binding.h>
 
@@ -68,18 +79,22 @@ Property<std::string> lowerCase = makeBoundProperty(
 text = "Hello World!";
 std::cout << lowerCase.get() << std::endl;
 ```
+
 Expected output:
-```
+
+```text
 hello world!
 ```
 
 ## No more broken bindings
+
 A common mistake in data binding is accidentally breaking a binding by assigning a value to it.
 
 With KDBindings this is no longer possible.
 Assigning a value to a property that is the result of a data binding will result in an error!
 
-### Example
+### Example: broken bindings
+
 ``` cpp
 #include <kdbindings/binding.h>
 
@@ -92,21 +107,28 @@ Property<int> result = makeBoundProperty(2 * value);
 result = 5; // this will throw a KDBindings::ReadOnlyProperty error!
 ```
 
-To intentionally remove a binding from a property, use its [`reset`](/ref KDBindings::Property::reset) function.
+To intentionally remove a binding from a property, use its
+[`reset`](/ref KDBindings::Property::reset) function.
 
 ### Reassigning a Binding
-Even though KDBindings prevents you from accidentally overriding a binding with a concrete value, assigning a
-new binding to a Property with an existing binding is possible.
 
-For this, use the KDBindings::makeBinding function instead of KDBindings::makeBoundProperty to create the binding.
+Even though KDBindings prevents you from accidentally overriding a binding with a concrete value,
+assigning a new binding to a Property with an existing binding is possible.
+
+For this, use the KDBindings::makeBinding function instead of KDBindings::makeBoundProperty to
+create the binding.
+
+It is also possible to use makeBoundProperty, which will move-assign a new Property into the
+existing one, therefore completely replacing the existing Property with a new one.  This means that
+all signals of the old property will be disconnected (see [signals & slots](signals-slots.md)) and
+any existing data bindings that depended on the property will be removed, which might not be what
+you want!
 
-It is also possible to use makeBoundProperty, which will move-assign a new Property into the existing one, therefore completely replacing the existing Property with a new one.
-This means that all signals of the old property will be disconnected (see [signals & slots](signals-slots.md)) and any existing data bindings that depended on the property will be removed, which might not be what you want!
+Rule of thumb: If you want to create a new property, use makeBoundProperty, if you want to add
+a new binding to an existing Property, use makeBinding.
 
-Rule of thumb: If you want to create a new property, use makeBoundProperty, if you want to add a new binding to an
-existing Property, use makeBinding.
+#### Example: reassign a binding
 
-#### Example
 ``` cpp
 #include <kdbindings/binding.h>
 
@@ -122,20 +144,23 @@ result = makeBoundProperty(4 * value); // This works too, but will override all
 // result is now 8
 ```
 
-
 ## Deferred evaluation
-KDBindings optionally offers data bindings with controlled, deferred evaluation.
 
-This feature is enabled by passing a KDBindings::BindingEvaluator to makeBoundProperty.
-The binding will then only be evaluated when [`evaluateAll()`](@ref KDbindings::BindingEvaluator::evaluateAll) is called on the evaluator instance.
+KDBindings optionally offers data bindings with controlled, deferred evaluation.
 
-Deferred evaluation is useful to avoid unnecessary reevaluation of a binding, as well as controlling the frequency of binding evaluation.
-Especially in UI applications, only updating the displayed values once per second can help in making them readable, compared to a bunch of values updating at 60Hz.
+This feature is enabled by passing a KDBindings::BindingEvaluator to makeBoundProperty.  The binding
+will then only be evaluated when [`evaluateAll()`](@ref KDbindings::BindingEvaluator::evaluateAll)
+is called on the evaluator instance.
 
-See the [06-lazy-property-bindings](./06-lazy-property-bindings_2main_8cpp-example.html) example for more details on how to use deferred evaluation.
+Deferred evaluation is useful to avoid unnecessary reevaluation of a binding, as well as controlling
+the frequency of binding evaluation.  Especially in UI applications, only updating the displayed
+values once per second can help in making them readable, compared to a bunch of values updating at 60Hz.
 
+See the [06-lazy-property-bindings](./06-lazy-property-bindings_2main_8cpp-example.html) example for
+more details on how to use deferred evaluation.
 
 ## Further reading
+
 Classes involved in data binding are KDBindings::Property, KDBindings::Binding, and KDBindings::BindingEvaluator.
 
 See KDBindings::makeBoundProperty for the different ways to create a binding.

docs/api/docs/getting-started/index.md

@@ -2,25 +2,30 @@
 
 ## Installation
 
-KDBindings is a header-only library, so you could just add the `/src/kdbindings/` directory to your projects include path or copy it into your project and start using KDBindings.
+KDBindings is a header-only library, so you could just add the `/src/kdbindings/` directory to your
+projects include path or copy it into your project and start using KDBindings.
 
-However, we recommend using [CMake](https://cmake.org/) to install KDBindings so it's available to any CMake project on your computer.
+However, we recommend using [CMake](https://cmake.org/) to install KDBindings so it's available to
+any CMake project on your computer.
 
 For this, first clone the project and install it:
 
 ### Linux/macOS
+
 ``` shell
 mkdir build
 cd build
 cmake ..
 cmake --build . --target install # this command might need super user privileges (i.e. sudo)
 ```
 
-### Windows:
+### Windows
+
 Navigate to the repository and create a folder named `build`.
 Navigate into the folder.
 Use `Shift`+`Right Click` and select `Open command window here`.
 In the terminal window, run:
+
 ``` cmd
 cmake ..
 cmake --build . --target install
@@ -29,24 +34,31 @@ cmake --build . --target install
 ## Accessing KDBindings
 
 ### Linking using CMake
-After installation, KDBindings is available using CMakes [find_package](https://cmake.org/cmake/help/latest/command/find_package.html) directive.
+
+After installation, KDBindings is available using CMake's
+[find_package](https://cmake.org/cmake/help/latest/command/find_package.html) directive.
 This directive then exposes a KDAB::KDBindings library that can be linked against.
 
 Example CMake code:
+
 ``` cmake
 find_package(KDBindings)
 target_link_libraries(${PROJECT_NAME} KDAB::KDBindings)
 ```
 
 Also make sure C++17 or later is enabled in your project:
+
 ``` cmake
 set(CMAKE_CXX_STANDARD 17)
 ```
 
 ### Including KDBindings
-Once the library is correctly added to your project, the different features of KDBindings are available for include under the `kdbindings` directory.
+
+Once the library is correctly added to your project, the different features of KDBindings are
+available for include under the `kdbindings` directory.
 
 All parts of KDBindings are then accessible in the KDBindings namespace.
+
 ``` cpp
 // Example includes
 #include <kdbindings/signal.h>