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https://github.com/torlando-tech/pyxis.git
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78 lines
2.5 KiB
C++
78 lines
2.5 KiB
C++
#pragma once
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#include <array>
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#include <cstddef>
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#include <cstdint>
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#include <string>
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#include "NomadNetCompactPage.h"
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#include "NomadNetMemory.h"
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namespace UI::LXMF::NomadNet {
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enum class FormEncodeResult : uint8_t {
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OK,
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INVALID_SELECTOR,
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VALUE_TOO_LARGE,
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TOO_MANY_ENTRIES,
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OUTPUT_TOO_LARGE,
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INVALID_STATE,
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ALLOCATION_FAILED,
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};
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inline void clear_encoded_form(ExternalVector<uint8_t>& bytes) {
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if (!bytes.empty()) {
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volatile uint8_t* cursor = bytes.data();
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for (std::size_t i = 0; i < bytes.size(); ++i) cursor[i] = 0;
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}
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ExternalVector<uint8_t>().swap(bytes);
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}
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class FormState {
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public:
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static constexpr std::size_t MAX_SELECTOR_BYTES = 511;
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static constexpr std::size_t MAX_SELECTORS = 64;
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static constexpr std::size_t MAX_ENTRIES = DocumentParser::MAX_FIELDS + MAX_SELECTORS;
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// Keep the full request envelope below the pinned Link MDU (431 bytes),
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// avoiding Resource retention and bounding transient internal-SRAM copies.
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static constexpr std::size_t MAX_ENCODED_BYTES = 384;
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static constexpr std::size_t REQUEST_ENVELOPE_BUDGET = 32;
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static constexpr std::size_t PINNED_LINK_MDU = 431;
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static_assert(MAX_ENCODED_BYTES + REQUEST_ENVELOPE_BUDGET <= PINNED_LINK_MDU,
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"Form requests must remain packet-sized");
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struct FieldState {
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uint16_t id = 0;
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FormFieldType type = FormFieldType::TEXT;
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std::array<char, DocumentParser::MAX_FIELD_NAME_BYTES + 1> name{};
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std::array<char, DocumentParser::MAX_FIELD_VALUE_BYTES + 1> value{};
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uint16_t name_length = 0;
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uint16_t value_length = 0;
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int16_t partial_region_index = -1;
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bool checked = false;
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bool masked = false;
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~FieldState() {
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volatile char* bytes = value.data();
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for (std::size_t i = 0; i < value.size(); ++i) bytes[i] = 0;
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}
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bool name_equals(const char* bytes, std::size_t size) const;
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};
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bool assign(const CompactPage& page);
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bool assign_preserving(const CompactPage& page, const FormState& previous);
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void clear();
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bool set_value(uint16_t id, const std::string& value);
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bool set_value(uint16_t id, const char* value, std::size_t size);
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bool set_checked(uint16_t id, bool checked);
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FormEncodeResult encode(const std::string& selectors,
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ExternalVector<uint8_t>& output) const;
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const ExternalVector<FieldState>& fields() const { return _fields; }
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private:
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ExternalVector<FieldState> _fields;
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};
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} // namespace UI::LXMF::NomadNet
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