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Add parse_line method to decouple buffer from gesture handler

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This commit is contained in:
Rico Tiongson 2019-02-12 19:26:19 +08:00
parent 7923effa02
commit cd179645e3
4 changed files with 71 additions and 47 deletions
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63
lib/gesture/swipe_gesture.cpp
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@ -20,7 +20,9 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <iostream> // std::cout, std::endl
#include "xdo_gesture.h"
#include <string> // std::stoi, std::stof
#include <regex> // std::regex, std::regex_match, std::cmatch
#include "swipe_gesture.h"
extern "C"
{
@ -127,6 +129,65 @@ namespace comfortable_swipe::gesture
void swipe_gesture::end()
{ }
/**
* Dispatches begin/update/end depending on the regex pattern provided by this class.
*
* @param line the line from libinput debug-events to parse
* @return true if begin/update/end was dispatched
*/
bool swipe_gesture::parse_line(const char * line)
{
// prepare regex matchers (will only load at most once)
static const std::regex gesture_swipe_begin(swipe_gesture::GESTURE_BEGIN_REGEX_PATTERN);
static const std::regex gesture_swipe_update(swipe_gesture::GESTURE_UPDATE_REGEX_PATTERN);
static const std::regex gesture_swipe_end(swipe_gesture::GESTURE_END_REGEX_PATTERN);
// prepare holder for regex matches
static std::cmatch matches;
if (this->flag_swiping)
{
// currently swiping
if (std::regex_match(line, matches, gesture_swipe_update) != 0)
{
// assign necessary variables for swipe update
this->fingers = std::stoi(matches[1]);
this->dx = std::stof(matches[2]);
this->dy = std::stof(matches[3]);
this->udx = std::stof(matches[4]);
this->udy = std::stof(matches[5]);
// dispatch update
this->update();
return true;
}
else if (std::regex_match(line, matches, gesture_swipe_end) != 0)
{
// assign necessary variables for swipe end
this->flag_swiping = false;
this->fingers = std::stoi(matches[1]);
// dispatch end
this->end();
return true;
}
}
else
{
// not swiping, check if swipe will begin
if (std::regex_match(line, matches, gesture_swipe_begin) != 0)
{
// assign necessary variables for swipe begin
this->flag_swiping = true;
this->fingers = std::stoi(matches[1]);
// dispatch begin
this->begin();
return true;
}
}
return false;
}
/* STATICS DEFINITIONS */
const int swipe_gesture::MSK_THREE_FINGERS = 0;
const int swipe_gesture::MSK_FOUR_FINGERS = 1;

4
lib/gesture/swipe_gesture.h
View File

@ -52,6 +52,7 @@ namespace comfortable_swipe::gesture
void begin() override;
void update() override;
void end() override;
bool parse_line(const char *) override;
protected:
// location of mouse
@ -62,6 +63,9 @@ namespace comfortable_swipe::gesture
int previous_gesture;
const char ** commands;
// optimization flag for checking if GESTURE_SWIPE_BEGIN was dispatched
bool flag_swiping;
public:
// static constants
static const int MSK_THREE_FINGERS;

1
lib/gesture/xdo_gesture.h
View File

@ -45,6 +45,7 @@ namespace comfortable_swipe
virtual void begin() = 0;
virtual void update() = 0;
virtual void end() = 0;
virtual bool parse_line(const char *) = 0;
};
}
}

48
lib/service/buffer.cpp
View File

@ -19,9 +19,7 @@ You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string> // std::stoi, std::stof
#include <cstdio> // std::fgets_unlocked, stdin
#include <regex> // std::regex, std::regex_match, std::cmatch
#include "../index.hpp"
/**
@ -34,13 +32,8 @@ namespace comfortable_swipe::service
// read config file
auto config = comfortable_swipe::util::read_config_file(comfortable_swipe::util::conf_filename());
// pre-compile regex patterns
static const std::regex gesture_swipe_begin(comfortable_swipe::gesture::swipe_gesture::GESTURE_BEGIN_REGEX_PATTERN);
static const std::regex gesture_swipe_update(comfortable_swipe::gesture::swipe_gesture::GESTURE_UPDATE_REGEX_PATTERN);
static const std::regex gesture_swipe_end(comfortable_swipe::gesture::swipe_gesture::GESTURE_END_REGEX_PATTERN);
// initialize swipe gesture handler
comfortable_swipe::gesture::swipe_gesture swipe
comfortable_swipe::gesture::swipe_gesture swipe_gesture_handler
(
config.count("threshold") ? std::stof(config["threshold"]) : 0.0,
config["left3"].c_str(),
@ -56,47 +49,12 @@ namespace comfortable_swipe::service
// prepare data containers
static const int MAX_LINE_LENGTH = 256;
static char data[MAX_LINE_LENGTH];
static std::cmatch matches;
// optimization flag for checking if GESTURE_SWIPE_BEGIN was dispatched
bool flag_swiping = false;
// start reading lines from input one by one
while (fgets_unlocked(data, MAX_LINE_LENGTH, stdin) != NULL)
{
if (flag_swiping)
{
// currently swiping
if (std::regex_match(data, matches, gesture_swipe_update) != 0)
{
// update swipe
swipe.fingers = std::stoi(matches[1]);
swipe.dx = std::stof(matches[2]);
swipe.dy = std::stof(matches[3]);
swipe.udx = std::stof(matches[4]);
swipe.udy = std::stof(matches[5]);
swipe.update();
}
else if (std::regex_match(data, matches, gesture_swipe_end) != 0)
{
// end swipe
flag_swiping = false;
swipe.fingers = std::stoi(matches[1]);
swipe.end();
}
}
else /* !flag_swiping */
{
// not swiping, check if swipe will begin
if (std::regex_match(data, matches, gesture_swipe_begin) != 0)
{
// begin swipe
flag_swiping = true;
swipe.fingers = std::stoi(matches[1]);
swipe.begin();
}
}
// attempt to parse swipe gestures
swipe_gesture_handler.parse_line(data);
}
}
}