Generateurv2/backend/api/exercices/pdfmaker.py

from api.Generateur import Generateur
from fontTools.ttLib import TTFont
from fontTools.ttLib.tables._c_m_a_p import CmapSubtable


def pdf_settings(path, number_in_serie, consigne):
    
    font = TTFont(
        '/usr/share/fonts/truetype/liberation/LiberationSerif-Regular.ttf')

    cmap = font['cmap']
    t = cmap.getcmap(3, 1).cmap
    s = font.getGlyphSet()
    units_per_em = font['head'].unitsPerEm

    def getTextWidth(text, pointSize):
        total = 0
        for c in text:
            if ord(c) in t and t[ord(c)] in s:
                total += s[t[ord(c)]].width
            else:
                total += s['.notdef'].width
        total = total*float(pointSize)/units_per_em
        return total
    
    exemple_exo = sorted(Generateur(path, 5, 'pdf'),
                         key=len, reverse=True)

    margin = 1.5
    column_sep = 30 * 2.54 / 72
    page_width = 21 - 2 * margin
    columns = int(
        page_width / (int(getTextWidth(exemple_exo[0]['calcul'], 12)*2.54/72) + 1))
    if columns * (getTextWidth(exemple_exo[0]['calcul'], 12)*2.54/72) + columns * column_sep + columns * (15*2.54/72) > page_width:
        columns -= 2
    columns -= 2
    exo_list = []
    exos = Generateur(path, number_in_serie, 'pdf')
    return {'columns': columns, 'exos': exos, 'consigne': consigne, 'correction': exos[0]['correction'] != None}


def page_settings(exos):
    # 
    max = 100
    total = 10 + 3 + 8
    pages = [{'exos': [], 'index': 1, 'jump': 0}]
    page_num = 0
    for ex in list(map(lambda e: e['exos'], exos)):
        #
        for e in ex:
            if (total) + (len(e['exercice'][0])) <= max:
                #
                #total + len(e['exercice'][0]) + 2 < max, e['index'])
                total += (len(e['exercice'][0]) * 2 * 2) + 4 + 3
                e['notLast'] = True
                pages[page_num]['exos'].append(e)
            else:
                pages[page_num]['exos'][len(
                    pages[page_num]['exos']) - 1]['notLast'] = False
                rest = max - (total - 1)
                pages[page_num]['jump'] = rest
                #
                id = pages[page_num]['index']
                page_num += 1
                pages.append({'exos': [], 'index': id + 1, 'jump': 0})
                pages[page_num]['exos'].append(e)
                total = (len(e['exercice'][0]) * 2 * 2) + 4 + 10 + 3 + 3 + 8
    #
    pages[len(pages) - 1]['exos'][len(pages[len(pages) - 1]
                                      ['exos']) - 1]['notLast'] = False
    #
    return pages