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Add app path functions to TactilityC

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This commit is contained in:
Ken Van Hoeylandt 2025-08-31 22:46:01 +02:00
parent 5cc5b50694
commit f56ed2c581
3 changed files with 55 additions and 1 deletions
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18
TactilityC/Include/tt_app.h
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@ -7,6 +7,7 @@ extern "C" {
#endif
typedef void* AppHandle;
typedef void* AppPathsHandle;
/** @return the bundle that belongs to this application, or null if it wasn't started with parameters. */
BundleHandle _Nullable tt_app_get_parameters(AppHandle handle);
@ -14,7 +15,7 @@ BundleHandle _Nullable tt_app_get_parameters(AppHandle handle);
/**
* Set the result before closing an app.
* The result and bundle are passed along to the app that launched this app, when this app is closed.
* @param[in] handle the app context handle to set the result for
* @param[in] handle the app handle to set the result for
* @param[in] result the result state to set
* @param[in] bundle the result bundle to set
*/
@ -23,6 +24,21 @@ void tt_app_set_result(AppHandle handle, AppResult result, BundleHandle _Nullabl
/** @return true if a result was set for this app context */
bool tt_app_has_result(AppHandle handle);
/** Get the path to the data directory of this app.
* @param[in] handle the app handle
* @param[out] buffer the output buffer (recommended size is 256 bytes)
* @param[inout] size used as input for maximum buffer size (including null terminator) and is set with the path string length by this function
*/
void tt_app_get_data_directory(AppPathsHandle handle, char* buffer, size_t& size);
/** Get the path to the data directory of this app, with LVGL drive letter prefix applied.
* The recommended buffer size is 256 bytes.
* @param[in] handle the app handle
* @param[out] buffer the output buffer (recommended size is 256 bytes)
* @param[inout] size used as input for maximum buffer size (including null terminator) and is set with the path string length by this function
*/
void tt_app_get_data_directory_lvgl(AppPathsHandle handle, char* buffer, size_t& size);
/**
* Start an app by id.
* @param[in] appId the app manifest id

36
TactilityC/Source/tt_app.cpp
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@ -4,6 +4,8 @@
extern "C" {
constexpr auto* TAG = "tt_app";
#define HANDLE_AS_APP_CONTEXT(handle) ((tt::app::AppContext*)(handle))
BundleHandle _Nullable tt_app_get_parameters(AppHandle handle) {
@ -31,4 +33,38 @@ void tt_app_stop() {
tt::app::stop();
}
void tt_app_get_data_directory(AppPathsHandle handle, char* buffer, size_t& size) {
assert(buffer != nullptr);
assert(size > 0);
auto paths = HANDLE_AS_APP_CONTEXT(handle)->getPaths();
auto data_path = paths->getDataDirectory();
auto expected_length = data_path.length() + 1;
if (size < expected_length) {
TT_LOG_E(TAG, "Path buffer not large enough (%d < %d)", size, expected_length);
size = 0;
buffer[0] = 0;
return;
}
strcpy(buffer, data_path.c_str());
size = data_path.length();
}
void tt_app_get_data_directory_lvgl(AppPathsHandle handle, char* buffer, size_t& size) {
assert(buffer != nullptr);
assert(size > 0);
auto paths = HANDLE_AS_APP_CONTEXT(handle)->getPaths();
auto data_path = paths->getDataDirectoryLvgl();
auto expected_length = data_path.length() + 1;
if (size < expected_length) {
TT_LOG_E(TAG, "Path buffer not large enough (%d < %d)", size, expected_length);
size = 0;
buffer[0] = 0;
return;
}
strcpy(buffer, data_path.c_str());
size = data_path.length();
}
}

2
TactilityC/Source/tt_init.cpp
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@ -119,6 +119,8 @@ const esp_elfsym elf_symbols[] {
ESP_ELFSYM_EXPORT(tt_app_selectiondialog_get_result_index),
ESP_ELFSYM_EXPORT(tt_app_alertdialog_start),
ESP_ELFSYM_EXPORT(tt_app_alertdialog_get_result_index),
ESP_ELFSYM_EXPORT(tt_app_get_data_directory),
ESP_ELFSYM_EXPORT(tt_app_get_data_directory_lvgl),
ESP_ELFSYM_EXPORT(tt_bundle_alloc),
ESP_ELFSYM_EXPORT(tt_bundle_free),
ESP_ELFSYM_EXPORT(tt_bundle_opt_bool),