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#ifndef WP_LAYOUT_ENGINE_H
#define WP_LAYOUT_ENGINE_H

#include "wp_layout_shared.h"

/* WP 5.1 Justification types */
typedef enum {
    WP_JUSTIFY_LEFT,
    WP_JUSTIFY_CENTER,
    WP_JUSTIFY_RIGHT,
    WP_JUSTIFY_FULL
} WpJustifyType;

typedef struct WpLine {
    uint16_t start_offset;
    uint16_t end_offset;
    uint16_t width;
    uint16_t space_count;
    WpJustifyType justification;
    bool is_hard_return;
} WpLine;

typedef struct WpPage {
    uint16_t page_number;
    uint16_t start_line;
    uint16_t end_line;
    uint16_t top_margin;
    uint16_t bottom_margin;
} WpPage;

/* H-Zone (Hyphenation Zone) settings */
typedef struct WpHZone {
    uint16_t left_percent;  /* Percent of line width */
    uint16_t right_percent;
} WpHZone;

/* Primary record bytes live at [first, first+count); consumed high-to-low toward first. */
void wp_primary_buffer_bind_bytes_lifo(WpLayoutGlobals *wl, uint8_t *first, int count, uint buffer_space);

/* Secondary record bytes are consumed FIFO from as_secondary_p; prepend moves the cursor down. 
 * Pass free_space to allow prepend operations before the initial data. */
void wp_secondary_buffer_bind(WpLayoutGlobals *wl, uint8_t *buffer, int initial_count, int free_space);

/* Core layout functions */
void wp_layout_break_line(WpLayoutGlobals *wl, WpLine *line);
void wp_layout_apply_justification(WpLine *line, uint16_t target_width);
void wp_layout_paginate(WpLayoutGlobals *wl);

#endif

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