pdf-page-verification-correction

PDF Page Count Verification and Correction

This skill provides a systematic approach to ensure PDFs meet target page count requirements through iterative verification and layout adjustment.

When to Use

• Creating PDFs with strict page limits (e.g., reports, summaries, maps)
• When initial PDF generation may produce variable page counts
• When layout elements (images, tables, text) can cause unpredictable overflow

Prerequisites

• Python with PyPDF2 or fitz (PyMuPDF) installed
• PDF generation capability (ReportLab, matplotlib, etc.)

Workflow Steps

Step 1: Initial PDF Creation

Generate the PDF with your initial layout parameters:

def create_pdf(output_path, params):
    """Create PDF with given layout parameters"""
    # Your PDF generation logic here
    # params can include: image_size, table_density, font_size, margins
    pass

Step 2: Verify Page Count

Check the generated PDF's page count:

import fitz  # PyMuPDF

def verify_page_count(pdf_path):
    """Return the number of pages in the PDF"""
    doc = fitz.open(pdf_path)
    page_count = len(doc)
    doc.close()
    return page_count

# Alternative with PyPDF2
from PyPDF2 import PdfReader

def verify_page_count_pypdf2(pdf_path):
    reader = PdfReader(pdf_path)
    return len(reader.pages)

Step 3: Compare Against Target

def check_page_requirement(actual, target_max, target_exact=None):
    """
    Check if page count meets requirements
    
    Returns: (meets_requirement, adjustment_needed)
    """
    if target_exact is not None:
        meets = (actual == target_exact)
        direction = "shrink" if actual > target_exact else "expand" if actual < target_exact else None
    else:
        meets = (actual <= target_max)
        direction = "shrink" if actual > target_max else None
    
    return meets, direction

Step 4: Adjust Layout Parameters

If page count exceeds target, adjust one or more parameters:

# Common adjustment strategies
ADJUSTMENT_STRATEGIES = {
    'images': {
        'action': 'reduce_size',
        'param': 'image_scale',
        'step': 0.1,  # Reduce by 10%
        'min': 0.5
    },
    'tables': {
        'action': 'reduce_density',
        'param': 'rows_per_page',
        'step': 2,  # Reduce by 2 rows per page
        'min': 5
    },
    'fonts': {
        'action': 'reduce_size',
        'param': 'font_size',
        'step': 1,  # Reduce by 1pt
        'min': 8
    },
    'margins': {
        'action': 'reduce',
        'param': 'margin_inches',
        'step': 0.1,  # Reduce by 0.1 inches
        'min': 0.3
    }
}

def adjust_params(current_params, direction, strategy='images'):
    """Apply adjustment to parameters"""
    adjusted = current_params.copy()
    strat = ADJUSTMENT_STRATEGIES[strategy]
    
    if direction == 'shrink':
        param = strat['param']
        current_val = adjusted.get(param, 1.0)
        new_val = max(current_val - strat['step'], strat['min'])
        adjusted[param] = new_val
    
    return adjusted