Difference between revisions of "Policies/Kdelibs Coding Style/zh-cn"

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* Take useful names. No short names, except:
 
* Take useful names. No short names, except:
 
** Single character variable names can denote counters and temporary variables whose purpose is obvious
 
** Single character variable names can denote counters and temporary variables whose purpose is obvious
** Variables and functions start with a lowercase letter
+
* Variables and functions start with a lowercase letter
  
 
Example:
 
Example:
Line 29: Line 29:
 
QString errorString;
 
QString errorString;
 
</syntaxhighlight>
 
</syntaxhighlight>
 +
  
 
== Whitespace ==
 
== Whitespace ==
Line 152: Line 153:
 
</syntaxhighlight>
 
</syntaxhighlight>
  
A related shell script could be found for unix in [http://websvn.kde.org/*checkout*/trunk/KDE/kdesdk/scripts/astyle-kdelibs kdesdk/scripts/astyle-kdelibs] and for windows in [http://websvn.kde.org/*checkout*/trunk/KDE/kdesdk/scripts/astyle-kdelibs.bat kdesdk/scripts/astyle-kdelibs.bat].
+
You can find a shell script to run this command in:
 +
 
 +
* [https://projects.kde.org/projects/kde/kdesdk/kde-dev-scripts/repository/revisions/master/raw/astyle-kdelibs kde-dev-scripts/astyle-kdelibs] (POSIX)
 +
* [https://projects.kde.org/projects/kde/kdesdk/kde-dev-scripts/repository/revisions/master/raw/astyle-kdelibs.bat kde-dev-scripts/astyle-kdelibs.bat] (Windows)
  
 
== Emacs and Vim scripts ==
 
== Emacs and Vim scripts ==
The "scripts" directory in the kdesdk module contains, among other useful things, some useful additions to the Emacs and Vim text editors that make it easier to edit KDE code with them.
+
The [https://projects.kde.org/projects/kde/kdesdk/kde-dev-scripts/repository/revisions/master/show kde-dev-scripts] directory in the kdesdk module contains, among other useful things, some useful additions to the Emacs and Vim text editors that make it easier to edit KDE code with them.
 
   
 
   
 
=== Emacs ===
 
=== Emacs ===
The [http://websvn.kde.org/trunk/KDE/kdesdk/scripts/kde-emacs kde-emacs] directory contains a set of key bindings, macros and general useful code. It is compatible with both GNU Emacs and XEmacs.
+
The [https://projects.kde.org/projects/kde/kdesdk/kde-dev-scripts/repository/revisions/master/show/kde-emacs kde-emacs] directory contains a set of key bindings, macros and general useful code. It is compatible with both GNU Emacs and XEmacs.
  
 
To start using kde-emacs, add the following to your .emacs:
 
To start using kde-emacs, add the following to your .emacs:
Line 172: Line 176:
  
 
=== Vim ===
 
=== Vim ===
You can find a vim script in [http://websvn.kde.org/*checkout*/trunk/KDE/kdesdk/scripts/kde-devel-vim.vim kdesdk/scripts/kde-devel-vim.vim] that helps you to keep the coding style correct. In addition to defaulting to the kdelibs coding style it will automatically use the correct style for Solid and kdepim code. If you want to add rules for other projects feel free to add them in the SetCodingStyle function.
+
You can find a vim script in [https://projects.kde.org/projects/kde/kdesdk/kde-dev-scripts/repository/revisions/master/raw/kde-devel-vim.vim kde-devel-vim.vim] that helps you to keep the coding style correct. In addition to defaulting to the kdelibs coding style it will automatically use the correct style for Solid and kdepim code. If you want to add rules for other projects feel free to add them in the SetCodingStyle function.
  
 
To use the script, include it in your {{path|~/.vimrc}} like this:
 
To use the script, include it in your {{path|~/.vimrc}} like this:

Latest revision as of 19:22, 7 April 2013

Other languages:Czech 44% • ‎English 100% • ‎Finnish 92% • ‎Brazilian Portuguese 92% • ‎Russian 44% • ‎Chinese (China) 8%

本文档介绍了 kdelibs 的推荐编码风格。并不强迫任何人遵守这种风格,但建议利用它以保持源代码的风格统一。

“简而言之:kdelibs 的编码沿用 Qt 4 的风格。”

Contents

[edit] 缩进

  • 不使用 Tab
  • 用四个空格代替 Tab

[edit] Variable declaration

  • Each variable declaration on a new line
  • Each new word in a variable name starts with a capital letter (so-called camelCase)
  • Avoid abbreviations
  • Take useful names. No short names, except:
    • Single character variable names can denote counters and temporary variables whose purpose is obvious
  • Variables and functions start with a lowercase letter

Example:

// wrong
KProgressBar *prbar;
QString prtxt, errstr;
 
// correct
KProgressBar *downloadProgressBar;
QString progressText;
QString errorString;


[edit] Whitespace

  • Use blank lines to group statements
  • Use only one empty line
  • Use one space after each keyword
  • For pointers or references, use a single space before '*' or '&', but not after
  • No space after a cast

Example:

// wrong
QString* myString;
if(true){
}
 
// correct
QString *myString;
if (true) {
}

[edit] Braces

As a base rule, the left curly brace goes on the same line as the start of the statement.

Example:

// wrong
if (true)
{
}
 
// correct
if (true) {
}

Exception: Function implementations, class, struct and namespace declarations always have the opening brace on the start of a line.

Example:

void debug(int i)
{
    qDebug("foo: %i", i);
}
 
class Debug
{
};

Use curly braces even when the body of a conditional statement contains only one line.

Example:

// wrong
if (true)
    return true;
 
for (int i = 0; i < 10; ++i)
    qDebug("%i", i);
 
// correct
if (true) {
    return true;
}
 
for (int i = 0; i < 10; ++i) {
    qDebug("%i", i);
}

[edit] Switch statements

Case labels are on the same column as the switch

Example:

switch (myEnum) {
case Value1:
    doSomething();
    break;
case Value2:
    doSomethingElse();
    // fall through
default:
    defaultHandling();
    break;
}

[edit] Line breaks

Try to keep lines shorter than 100 characters, inserting line breaks as necessary.

[edit] Qt Includes

  • If you add #includes for Qt classes, use both the module and class name. This allows library code to be used by applications without excessive compiler include paths.

Example:

// wrong
#include <QString>
 
// correct
#include <QtCore/QString>

[edit] Artistic Style (astyle) automatic code formatting

You can use astyle (>=1.23) to format code or to test if you have followed this document. Run the following command:

astyle --indent=spaces=4 --brackets=linux \
       --indent-labels --pad=oper --unpad=paren \
       --one-line=keep-statements --convert-tabs \
       --indent-preprocessor \
       `find -type f -name '*.cpp'-or -name '*.cc' -or -name '*.h'`

With astyle (>=2.01) you need to run the following command:

astyle --indent=spaces=4 --brackets=linux \
       --indent-labels --pad-oper --unpad-paren --pad-header \
       --keep-one-line-statements --convert-tabs \
       --indent-preprocessor \
       `find -type f -name '*.cpp' -or -name '*.cc' -or -name '*.h'`

You can find a shell script to run this command in:

[edit] Emacs and Vim scripts

The kde-dev-scripts directory in the kdesdk module contains, among other useful things, some useful additions to the Emacs and Vim text editors that make it easier to edit KDE code with them.

[edit] Emacs

The kde-emacs directory contains a set of key bindings, macros and general useful code. It is compatible with both GNU Emacs and XEmacs.

To start using kde-emacs, add the following to your .emacs:

(add-to-list 'load-path "/path/to/kde-emacs")
(require 'kde-emacs)

Many settings can be changed by editing the "kde-emacs" group via M-x customize-group.

For more information, including what the key bindings are and what additional settings you could add to your .emacs, please check kde-emacs.el itself.

[edit] Vim

You can find a vim script in kde-devel-vim.vim that helps you to keep the coding style correct. In addition to defaulting to the kdelibs coding style it will automatically use the correct style for Solid and kdepim code. If you want to add rules for other projects feel free to add them in the SetCodingStyle function.

To use the script, include it in your ~/.vimrc like this:

source /path/to/kde/sources/kdesdk/scripts/kde-devel-vim.vim


Document started by Urs Wolfer. Some parts of this document have been adopted from the Qt Coding Style document posted by Zack Rusin on kde-core-devel.


This page was last modified on 7 April 2013, at 19:22. This page has been accessed 1,991 times. Content is available under Creative Commons License SA 3.0 as well as the GNU Free Documentation License 1.2.
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