QGIS API Documentation  3.13.0-Master (7f54853aae)
Public Types | Static Public Member Functions | List of all members
QgsStringUtils Class Reference

Utility functions for working with strings. More...

#include <qgsstringutils.h>

Public Types

enum  Capitalization {
  MixedCase = QFont::MixedCase, AllUppercase = QFont::AllUppercase, AllLowercase = QFont::AllLowercase, ForceFirstLetterToCapital = QFont::Capitalize,
  TitleCase = QFont::Capitalize + 1000, UpperCamelCase = QFont::Capitalize + 1001
}
 Capitalization options. More...
 

Static Public Member Functions

static QString ampersandEncode (const QString &string)
 Makes a raw string safe for inclusion as a HTML/XML string literal. More...
 
static QString capitalize (const QString &string, Capitalization capitalization)
 Converts a string by applying capitalization rules to the string. More...
 
static int hammingDistance (const QString &string1, const QString &string2, bool caseSensitive=false)
 Returns the Hamming distance between two strings. More...
 
static QString htmlToMarkdown (const QString &html)
 Convert simple HTML to markdown. More...
 
static QString insertLinks (const QString &string, bool *foundLinks=nullptr)
 Returns a string with any URL (e.g., http(s)/ftp) and mailto: text converted to valid HTML <a ...> links. More...
 
static int levenshteinDistance (const QString &string1, const QString &string2, bool caseSensitive=false)
 Returns the Levenshtein edit distance between two strings. More...
 
static QString longestCommonSubstring (const QString &string1, const QString &string2, bool caseSensitive=false)
 Returns the longest common substring between two strings. More...
 
static QString soundex (const QString &string)
 Returns the Soundex representation of a string. More...
 
static QString substituteVerticalCharacters (QString string)
 Returns a string with characters having vertical representation form substituted. More...
 
static QString wordWrap (const QString &string, int length, bool useMaxLineLength=true, const QString &customDelimiter=QString())
 Automatically wraps a string by inserting new line characters at appropriate locations in the string. More...
 

Detailed Description

Utility functions for working with strings.

Since
QGIS 2.11

Definition at line 180 of file qgsstringutils.h.

Member Enumeration Documentation

◆ Capitalization

Capitalization options.

Enumerator
MixedCase 

Mixed case, ie no change.

AllUppercase 

Convert all characters to uppercase.

AllLowercase 

Convert all characters to lowercase.

ForceFirstLetterToCapital 

Convert just the first letter of each word to uppercase, leave the rest untouched.

TitleCase 

Simple title case conversion - does not fully grammatically parse the text and uses simple rules only. Note that this method does not convert any characters to lowercase, it only uppercases required letters. Callers must ensure that input strings are already lowercased.

UpperCamelCase 

Convert the string to upper camel case. Note that this method does not unaccent characters.

Definition at line 185 of file qgsstringutils.h.

Member Function Documentation

◆ ampersandEncode()

QString QgsStringUtils::ampersandEncode ( const QString &  string)
static

Makes a raw string safe for inclusion as a HTML/XML string literal.

This includes replacing '<' with '<', '>' with '>', '&' with '&amp', and any extended unicode characters with the XML style &#233; encoded versions of these characters.

Since
QGIS 3.2

Definition at line 111 of file qgsstringutils.cpp.

◆ capitalize()

QString QgsStringUtils::capitalize ( const QString &  string,
QgsStringUtils::Capitalization  capitalization 
)
static

Converts a string by applying capitalization rules to the string.

Parameters
stringinput string
capitalizationcapitalization type to apply
Returns
capitalized string
Since
QGIS 3.0

Definition at line 24 of file qgsstringutils.cpp.

◆ hammingDistance()

int QgsStringUtils::hammingDistance ( const QString &  string1,
const QString &  string2,
bool  caseSensitive = false 
)
static

Returns the Hamming distance between two strings.

This equates to the number of characters at corresponding positions within the input strings where the characters are different. The input strings must be the same length.

Parameters
string1first string
string2second string
caseSensitiveset to true for case sensitive comparison
Returns
Hamming distance between strings, or -1 if strings are different lengths.

Definition at line 276 of file qgsstringutils.cpp.

◆ htmlToMarkdown()

QString QgsStringUtils::htmlToMarkdown ( const QString &  html)
static

Convert simple HTML to markdown.

Only br, b and link are supported.

Parameters
htmlHTML to convert to markdown
Returns
String formatted as markdown
Since
QGIS 3.10

Definition at line 451 of file qgsstringutils.cpp.

◆ insertLinks()

QString QgsStringUtils::insertLinks ( const QString &  string,
bool *  foundLinks = nullptr 
)
static

Returns a string with any URL (e.g., http(s)/ftp) and mailto: text converted to valid HTML <a ...> links.

Parameters
stringstring to insert links into
foundLinksif specified, will be set to true if any links were inserted into the string
Returns
string with inserted links
Since
QGIS 3.0

Definition at line 410 of file qgsstringutils.cpp.

◆ levenshteinDistance()

int QgsStringUtils::levenshteinDistance ( const QString &  string1,
const QString &  string2,
bool  caseSensitive = false 
)
static

Returns the Levenshtein edit distance between two strings.

This equates to the minimum number of character edits (insertions, deletions or substitutions) required to change one string to another.

Parameters
string1first string
string2second string
caseSensitiveset to true for case sensitive comparison
Returns
edit distance. Lower distances indicate more similar strings.

Definition at line 131 of file qgsstringutils.cpp.

◆ longestCommonSubstring()

QString QgsStringUtils::longestCommonSubstring ( const QString &  string1,
const QString &  string2,
bool  caseSensitive = false 
)
static

Returns the longest common substring between two strings.

This substring is the longest string that is a substring of the two input strings. For example, the longest common substring of "ABABC" and "BABCA" is "ABC".

Parameters
string1first string
string2second string
caseSensitiveset to true for case sensitive comparison
Returns
longest common substring

Definition at line 213 of file qgsstringutils.cpp.

◆ soundex()

QString QgsStringUtils::soundex ( const QString &  string)
static

Returns the Soundex representation of a string.

Soundex is a phonetic matching algorithm, so strings with similar sounds should be represented by the same Soundex code.

Parameters
stringinput string
Returns
4 letter Soundex code

Definition at line 315 of file qgsstringutils.cpp.

◆ substituteVerticalCharacters()

QString QgsStringUtils::substituteVerticalCharacters ( QString  string)
static

Returns a string with characters having vertical representation form substituted.

Parameters
stringinput string
Returns
string with substitution applied
Since
QGIS 3.10

Definition at line 544 of file qgsstringutils.cpp.

◆ wordWrap()

QString QgsStringUtils::wordWrap ( const QString &  string,
int  length,
bool  useMaxLineLength = true,
const QString &  customDelimiter = QString() 
)
static

Automatically wraps a string by inserting new line characters at appropriate locations in the string.

The length argument specifies either the minimum or maximum length of lines desired, depending on whether useMaxLineLength is true. If useMaxLineLength is true, then the string will be wrapped so that each line ideally will not exceed length of characters. If useMaxLineLength is false, then the string will be wrapped so that each line will ideally exceed length of characters.

A custom delimiter can be specified to use instead of space characters.

Since
QGIS 3.4

Definition at line 474 of file qgsstringutils.cpp.


The documentation for this class was generated from the following files: