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Commit 2f13e022 authored by Prabir Pradhan's avatar Prabir Pradhan
Browse files

InputEventLabels: Support lookup of evdev event codes by label 

Bug: 293327283
Test: atest CtsInputTestCases
Change-Id: I846e1dc1eb450ea92d35ac7e403b06e2a029f25b
parent 1030142f

include/input/InputEventLabels.h

+6 −0
Original line number Diff line number Diff line
@@ -69,6 +69,12 @@ public: 


    static EvdevEventLabel getLinuxEvdevLabel(int32_t type, int32_t code, int32_t value);



    static std::optional<int> getLinuxEvdevEventTypeByLabel(const char* label);



    static std::optional<int> getLinuxEvdevEventCodeByLabel(int32_t type, const char* label);



    static std::optional<int> getLinuxEvdevInputPropByLabel(const char* label);



private:

    InputEventLookup();

libs/input/InputEventLabels.cpp

+22 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 


#include <linux/input-event-codes.h>

#include <linux/input.h>

#include <strings.h>



#define DEFINE_KEYCODE(key) { #key, AKEYCODE_##key }

#define DEFINE_AXIS(axis) { #axis, AMOTION_EVENT_AXIS_##axis }
@@ -523,6 +524,14 @@ std::string getLabel(const label* labels, int value) { 
    return labels->name != nullptr ? labels->name : std::to_string(value);

}



std::optional<int> getValue(const label* labels, const char* searchLabel) {

    if (labels == nullptr) return {};

    while (labels->name != nullptr && ::strcasecmp(labels->name, searchLabel) != 0) {

        labels++;

    }

    return labels->name != nullptr ? std::make_optional(labels->value) : std::nullopt;

}



const label* getCodeLabelsForType(int32_t type) {

    switch (type) {

        case EV_SYN:
@@ -572,4 +581,17 @@ EvdevEventLabel InputEventLookup::getLinuxEvdevLabel(int32_t type, int32_t code, 
    };

}



std::optional<int> InputEventLookup::getLinuxEvdevEventTypeByLabel(const char* label) {

    return getValue(ev_labels, label);

}



std::optional<int> InputEventLookup::getLinuxEvdevEventCodeByLabel(int32_t type,

                                                                   const char* label) {

    return getValue(getCodeLabelsForType(type), label);

}



std::optional<int> InputEventLookup::getLinuxEvdevInputPropByLabel(const char* label) {

    return getValue(input_prop_labels, label);

}



} // namespace android