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[xml] Add new guidelines, fix markdown warnings

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Ref: https://github.com/notepad-plus-plus/notepad-plus-plus/pull/13444#discussion_r1160284972

Close #13487
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ozone10 2023-04-07 12:15:50 +02:00 committed by Don Ho
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CONTRIBUTING.md
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@ -4,7 +4,7 @@
## Reporting Issues ## Reporting Issues
Bug reports are appreciated. Following a few guidelines listed below will help speed up the process of getting them fixed. Bug reports are appreciated. Following a few guidelines listed below will help speed up the process of getting them fixed.
1. Search the issue tracker to see if it has already been reported. 1. Search the issue tracker to see if it has already been reported.
2. Disable your plugins to see if one of them is the problem. You can do this by renaming your `plugins` folder to something else. 2. Disable your plugins to see if one of them is the problem. You can do this by renaming your `plugins` folder to something else.
@ -27,8 +27,6 @@ Your pull requests are welcome; however, they may not be accepted for various re
Opening an issue beforehand allows the administrators and the community to discuss bugs and enhancements before work begins, preventing wasted effort. Opening an issue beforehand allows the administrators and the community to discuss bugs and enhancements before work begins, preventing wasted effort.
### Guidelines for pull requests ### Guidelines for pull requests
1. Respect existing Notepad++ coding style. Observe the code near your intended change, and attempt to preserve the style of that code with the changes you make. 1. Respect existing Notepad++ coding style. Observe the code near your intended change, and attempt to preserve the style of that code with the changes you make.
@ -39,22 +37,22 @@ Opening an issue beforehand allows the administrators and the community to discu
6. PR of reformatting (changing of ws/TAB, line endings or coding style) of source code won't be accepted. Use issue trackers for your request instead. 6. PR of reformatting (changing of ws/TAB, line endings or coding style) of source code won't be accepted. Use issue trackers for your request instead.
7. Typo fixing and code refactoring won't be accepted - please create issues with title started with `TYPO` to request the changing. 7. Typo fixing and code refactoring won't be accepted - please create issues with title started with `TYPO` to request the changing.
8. Address the review change requests by pushing new commits to the same PR. Avoid amending a commit and then force pushing it. All the PR commits are squashed before merging to the main branch. 8. Address the review change requests by pushing new commits to the same PR. Avoid amending a commit and then force pushing it. All the PR commits are squashed before merging to the main branch.
9. Finally, please test your pull requests, at least once. 9. When creating new PR, try to base it on latest master.
10. Don't merge `upstream/master` (using git or via github sync), if your PR is based on older `upstream/master`. If you need to base it on latest `master` (e.g. to check and fix merge conflict), use commands `git fetch upstream` to get latest `master` and then `git rebase upstream/master` to rebase it onto this latest `upstream/master`.
11. Finally, please test your pull requests, at least once.
In short: The easier the code review is, the better the chance your pull request will get accepted. In short: The easier the code review is, the better the chance your pull request will get accepted.
### Coding style ### Coding style
![stay clean](https://notepad-plus-plus.org/assets/images/good-bad-practice.jpg) ![stay clean](https://notepad-plus-plus.org/assets/images/good-bad-practice.jpg)
#### GENERAL #### GENERAL
1. ##### Do not use Java-like braces. 1. Do not use Java-like braces
* Good:
* ###### Good:
```cpp ```cpp
void MyClass::method1() void MyClass::method1()
{ {
@ -65,7 +63,8 @@ In short: The easier the code review is, the better the chance your pull request
} }
``` ```
* ###### Bad: * Bad:
```cpp ```cpp
void MyClass::method1() { void MyClass::method1() {
if (aCondition) { if (aCondition) {
@ -73,8 +72,11 @@ In short: The easier the code review is, the better the chance your pull request
} }
} }
``` ```
However, the method definition could be defined in a header file (.h), if there's one line code only. In this case, Java-like braces should be used.
* ###### Good: However, the method definition could be defined in a header file (.h), if there's one line code only. In this case, Java-like braces should be used.
* Good:
```cpp ```cpp
class MyClass class MyClass
{ {
@ -88,152 +90,237 @@ In short: The easier the code review is, the better the chance your pull request
int _x; int _x;
} }
``` ```
2. ##### Use tabs instead of white-spaces (we usually set our editors to 4 white-spaces for 1 tab, but the choice is up to you).
2. Use tabs instead of white-spaces (we usually set our editors to 4 white-spaces for 1 tab, but the choice is up to you)
3. ##### Always leave one space before and after binary and ternary operators. 3. Always leave one space before and after binary and ternary operators
* Good:
* ###### Good:
```cpp ```cpp
if (a == 10 && b == 42) if (a == 10 && b == 42)
``` ```
* ###### Bad: * Bad:
```cpp ```cpp
if (a==10&&b==42) if (a==10&&b==42)
``` ```
4. ##### Only leave one space after semi-colons in "for" statements. 4. Only leave one space after semi-colons in "for" statements
* Good:
* ###### Good:
```cpp ```cpp
for (int i = 0; i != 10; ++i) for (int i = 0; i != 10; ++i)
``` ```
* ###### Bad: * Bad:
```cpp ```cpp
for(int i=0;i<10;++i) for(int i=0;i<10;++i)
``` ```
5. ##### Function names are not separated from the first parenthesis. 5. Function names are not separated from the first parenthesis
* Good:
* ###### Good:
```cpp ```cpp
foo(); foo();
myObject.foo(24); myObject.foo(24);
``` ```
* ###### Bad: * Bad:
```cpp ```cpp
foo (); foo ();
``` ```
6. ##### Keywords are separated from the first parenthesis by one space. 6. Keywords are separated from the first parenthesis by one space
* Good:
* ###### Good:
```cpp ```cpp
if (true) if (true)
while (true) while (true)
``` ```
* ###### Bad: * Bad:
```cpp ```cpp
if(myCondition) if(myCondition)
``` ```
7. ##### Use the following indenting for "switch" statements: 7. Switch
```cpp * Use the following indenting for "switch" statements:
switch (test)
{
case 1:
{
// Do something
break;
}
default:
// Do something else
} // No semi-colon here
```
8. ##### Avoid magic numbers. ```cpp
switch (test)
{
case 1:
{
// Do something
break;
}
default:
// Do something else
} // No semi-colon here
```
* If possible use `default` statement, and prefer using it as last case.
* When using switch with enum or known range, try to cover all values if not using `default`.
```cpp
enum class Test {val1, val2, val3}
switch (Test)
{
case Test::val1:
{
// Do something
break;
}
//case Test::val2:
//case Test::val3:
default:
// Do something else
} // No semi-colon here
```
When using `default` adding uncovered values as comments can help to convey intention.
* Use `[[fallthrough]]` if fall through is intended.
```cpp
switch (test)
{
case 1:
{
// Do something
}
// I want fall through // adding comment can help to convey intention
[[fallthrough]];
case 2:
{
// Do something
break;
}
default:
// Do something else
} // No semi-colon here
```
8. Avoid magic numbers
* Good:
* ###### Good:
```cpp ```cpp
if (foo == I_CAN_PUSH_ON_THE_RED_BUTTON) if (foo == I_CAN_PUSH_ON_THE_RED_BUTTON)
startTheNuclearWar(); startTheNuclearWar();
``` ```
* ###### Bad: * Bad:
```cpp ```cpp
while (lifeTheUniverseAndEverything != 42) while (lifeTheUniverseAndEverything != 42)
lifeTheUniverseAndEverything = buildMorePowerfulComputerForTheAnswer(); lifeTheUniverseAndEverything = buildMorePowerfulComputerForTheAnswer();
``` ```
9. ##### Prefer enums for integer constants. 9. Prefer enums for integer constants
10. ##### Use initialization with curly braces. 10. Use initialization with curly braces
* Good:
* ###### Good:
```cpp ```cpp
MyClass instance{10.4}; MyClass instance{10.4};
``` ```
* ###### Bad: * Bad:
```cpp ```cpp
MyClass instance(10.4); MyClass instance(10.4);
``` ```
11. ##### Always use `empty()` for testing if a string is empty or not. 11. Always use `empty()` for testing if a string is empty or not
* Good:
* ###### Good:
```cpp ```cpp
if (!string.empty()) if (!string.empty())
... ...
``` ```
* ###### Bad: * Bad:
```cpp ```cpp
if (string != "") if (string != "")
... ...
``` ```
12. Always use `C++ conversion` instead of `C-Style cast`
12. ##### Always use `C++ conversion` instead of `C-Style cast`. Generally, all the conversion among types should be avoided. If you have no choice, use C++ conversion. * Generally, all the conversion among types should be avoided. If you have no choice, use C++ conversion.
* Good:
* ###### Good:
```cpp ```cpp
char aChar = static_cast<char>(_pEditView->execute(SCI_GETCHARAT, j)); char aChar = static_cast<char>(_pEditView->execute(SCI_GETCHARAT, j));
``` ```
* ###### Bad: * Bad:
```cpp ```cpp
char aChar = (char)_pEditView->execute(SCI_GETCHARAT, j); char aChar = (char)_pEditView->execute(SCI_GETCHARAT, j);
``` ```
13. ##### Use `!` instead of `not`, `&&` instead of `and`, `||` instead of `or`. 13. Use `!` instead of `not`, `&&` instead of `and`, `||` instead of `or`
* Good:
* ###### Good:
```cpp ```cpp
if (!::PathFileExists(dir2Search)) if (!::PathFileExists(dir2Search))
``` ```
* ###### Bad: * Bad:
```cpp ```cpp
if (not ::PathFileExists(dir2Search)) if (not ::PathFileExists(dir2Search))
``` ```
14. Always initializatize local and global variables
* For primitive types and enum prefer initialization with `=`.
* For other prefer `{}`-initializer syntax.
* For "numerical" variables using literal suffix can help to convey intention.
```cpp
constexpr float g_globalVariable = 0.0F;
void test()
{
constexpr UINT strLen = 1024U;
wchar_t myString[strLen]{};
}
```
#### NAMING CONVENTIONS #### NAMING CONVENTIONS
1. ##### Classes uses Pascal Case 1. Classes uses Pascal Case
* Good:
* ###### Good:
```cpp ```cpp
class IAmAClass class IAmAClass
{}; {};
``` ```
* ###### Bad: * Bad:
```cpp ```cpp
class iAmAClass class iAmAClass
{}; {};
@ -241,87 +328,128 @@ In short: The easier the code review is, the better the chance your pull request
{}; {};
``` ```
2. ##### Methods & method parameters use camel Case 2. Methods & method parameters
```cpp * Use camel Case
void myMethod(uint myVeryLongParameter);
```
3. ##### Member variables ```cpp
void myMethod(uint myVeryLongParameter);
```
Any member variable name of class/struct should be preceded by an underscore. 3. Member variables
```cpp * Any member variable name of class/struct should be preceded by an underscore.
public:
int _publicAttribute;
private:
int _pPrivateAttribute;
float _pAccount;
```
4. ##### Always prefer a variable name that describes what the variable is used for. ```cpp
public:
int _publicAttribute;
private:
int _pPrivateAttribute;
float _pAccount;
```
4. Always prefer a variable name that describes what the variable is used for
* Good:
* ###### Good:
```cpp ```cpp
if (hours < 24 && minutes < 60 && seconds < 60) if (hours < 24 && minutes < 60 && seconds < 60)
``` ```
* ###### Bad: * Bad:
```cpp ```cpp
if (a < 24 && b < 60 && c < 60) if (a < 24 && b < 60 && c < 60)
``` ```
#### COMMENTS #### COMMENTS
1. ##### Use C++ comment line style rather than C comment style. 1. Use C++ comment line style rather than C comment style
* ###### Good: * Good:
```
```cpp
// Two lines comment // Two lines comment
// Use still C++ comment line style // Use still C++ comment line style
``` ```
* ###### Bad: * Bad:
```
```cpp
/* /*
Please don't piss me off with that Please don't piss me off with that
*/ */
``` ```
#### BEST PRACTICES #### BEST PRACTICES
1. ##### Use C++11/14/17 whenever it is possible 1. Use C++11/14/17/20 whenever it is possible.
2. ##### Use C++11 member initialization feature whenever it is possible 2. Use C++11 member initialization feature whenever it is possible.
```cpp ```cpp
class Foo class Foo
{ {
int value = 0; int value = 0;
}; };
``` ```
3. ##### Prefer Pre-increment: 3. Incrementing
```cpp * Prefer Pre-increment
++i
```
##### **Over Post-increment:** ```cpp
```cpp ++i
i++ ```
```
(It does not change anything for built-in types but it would bring consistency)
4. ##### Avoid using pointers. References are preferred instead. You might need the variable to be assigned a NULL value: in this case the NULL value has semantics and must be checked. Wherever possible, use a SmartPtr instead of old-school pointers. * Over Post-increment
5. ##### Avoid using new if you can use automatic variable. However, avoid `shared_ptr` as much as possible. Prefer `unique_ptr` instead. ```cpp
i++
```
6. ##### Don't place any "using namespace" directives in headers. (It does not change anything for built-in types but it would bring consistency)
7. ##### Compile time is without incidence. Increasing compile time to reduce execution time is encouraged. 4. Avoid using pointers. References are preferred instead. You might need the variable to be assigned a `NULL` value: in this case the `NULL` value has semantics and must be checked. Wherever possible, use a SmartPtr instead of old-school pointers.
8. ##### Code legibility and length is less important than easy and fast end-user experience. 5. Avoid using new if you can use automatic variable. However, avoid `shared_ptr` as much as possible. Prefer `unique_ptr` instead.
6. Don't place any "using namespace" directives in headers.
7. Compile time is without incidence. Increasing compile time to reduce execution time is encouraged.
8. Code legibility and length is less important than easy and fast end-user experience.
9. Prefer `constexpr` over `const` if value can be evaluated at compile time.
10. Check if there are helper functions in headers or lambda fuctions to reuse them instead of writing new code.
* Example
```cpp
// in StaticDialog.h
isCheckedOrNot();
setChecked();
// in Parameters.cpp
parseYesNoBoolAttribute();
```
11. Check if there is already defined global variable, and reuse it instead of defining new one.
12. Avoid "Yoda conditions".
* Good:
```cpp
if (iAmYourFather == true)
...
```
* Bad:
```cpp
if (true == iAmYourFather)
...
```
13. Check [C++ Core Guidlines](https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md) for additional guidelines.