mirror of
https://github.com/quitesimpleorg/qsmaddy.git
synced 2024-12-21 10:59:48 +01:00
Linkparser: Use callbacks, so app can influence how the HTML gets rendered exactly
In particular, this allows making dynamic decisions: Some links may for example require a different CSS class or so, therefore a static hardcoded template is not enough for those cases.
This commit is contained in:
parent
8ac353a9d7
commit
e0e0db80d5
include/maddy
36
include/maddy/callbackreplacer.h
Normal file
36
include/maddy/callbackreplacer.h
Normal file
@ -0,0 +1,36 @@
|
||||
/*
|
||||
* This project is licensed under the MIT license. For more information see the
|
||||
* LICENSE file.
|
||||
*/
|
||||
#pragma once
|
||||
|
||||
#include <string>
|
||||
#include <regex>
|
||||
#include <functional>
|
||||
|
||||
namespace maddy {
|
||||
|
||||
inline std::string regex_callback_replacer(std::regex ®ex, const std::string &input,
|
||||
std::function<std::string(std::smatch &)> &callback)
|
||||
{
|
||||
std::string result;
|
||||
auto tagsbegin = std::sregex_iterator(input.begin(), input.end(), regex);
|
||||
auto tagsend = std::sregex_iterator();
|
||||
auto matchbegin = 0;
|
||||
for(std::sregex_iterator i = tagsbegin; i != tagsend; ++i)
|
||||
{
|
||||
std::smatch match = *i;
|
||||
|
||||
auto matchlength = match.length(0);
|
||||
auto matchpos = match.position();
|
||||
|
||||
result += input.substr(matchbegin, matchpos - matchbegin);
|
||||
result += callback(match);
|
||||
matchbegin = matchpos + matchlength;
|
||||
}
|
||||
result += input.substr(matchbegin);
|
||||
return result;
|
||||
}
|
||||
|
||||
}
|
||||
|
@ -10,6 +10,7 @@
|
||||
#include <regex>
|
||||
|
||||
#include "maddy/lineparser.h"
|
||||
#include "maddy/callbackreplacer.h"
|
||||
|
||||
// -----------------------------------------------------------------------------
|
||||
|
||||
@ -26,6 +27,16 @@ namespace maddy {
|
||||
*/
|
||||
class LinkParser : public LineParser
|
||||
{
|
||||
private:
|
||||
std::function<std::string(std::smatch &)> callback = [](std::smatch & match){
|
||||
std::string inner = match.str(1);
|
||||
std::string link = match.str(2);
|
||||
return "<a href=\"" + link + "\">" + inner + "</a>";
|
||||
};
|
||||
|
||||
std::regex re = std::regex("\\[([^\\]]*)\\]\\(([^\\]]*)\\)");
|
||||
|
||||
|
||||
public:
|
||||
/**
|
||||
* Parse
|
||||
@ -41,10 +52,12 @@ public:
|
||||
void
|
||||
Parse(std::string& line) override
|
||||
{
|
||||
static std::regex re("\\[([^\\]]*)\\]\\(([^\\]]*)\\)");
|
||||
static std::string replacement = "<a href=\"$2\">$1</a>";
|
||||
line = regex_callback_replacer(re,line,callback);
|
||||
}
|
||||
|
||||
line = std::regex_replace(line, re, replacement);
|
||||
void setCallback(std::function<std::string(std::smatch &)> callback)
|
||||
{
|
||||
this->callback = callback;
|
||||
}
|
||||
}; // class LinkParser
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user