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How to use truncate method in localstack

Best Python code snippet using localstack_python

divmodself.js

Source:divmodself.js

...55        })()56    } catch (e) {}57}58// Assorted tests.59function sdiv_truncate(y) {60  return (y / y)|0;61}62assertEq(sdiv_truncate(5), 1);63assertEq(sdiv_truncate(1), 1);64assertEq(sdiv_truncate(-1), 1);65assertEq(sdiv_truncate(0), 0);66assertEq(sdiv_truncate(-0), 0);67assertEq(sdiv_truncate(1.1), 1);68assertEq(sdiv_truncate(-1.1), 1);69assertEq(sdiv_truncate(Infinity), 0);70assertEq(sdiv_truncate(NaN), 0);71assertEq(sdiv_truncate(undefined), 0);72assertEq(sdiv_truncate(null), 0);73function sdiv(y) {74  return y / y;75}76assertEq(sdiv(5), 1);77assertEq(sdiv(1), 1);78assertEq(sdiv(-1), 1);79assertEq(sdiv(0), NaN);80assertEq(sdiv(-0), NaN);81assertEq(sdiv(1.1), 1);82assertEq(sdiv(-1.1), 1);83assertEq(sdiv(Infinity), NaN);84assertEq(sdiv(NaN), NaN);85assertEq(sdiv(undefined), NaN);86assertEq(sdiv(null), NaN);87function udiv_truncate(y) {88  var yu = y>>>0;89  return (yu / yu)|0;90}91assertEq(udiv_truncate(5), 1);92assertEq(udiv_truncate(1), 1);93assertEq(udiv_truncate(-1), 1);94assertEq(udiv_truncate(0), 0);95assertEq(udiv_truncate(-0), 0);96assertEq(udiv_truncate(1.1), 1);97assertEq(udiv_truncate(-1.1), 1);98assertEq(udiv_truncate(Infinity), 0);99assertEq(udiv_truncate(NaN), 0);100assertEq(udiv_truncate(undefined), 0);101assertEq(udiv_truncate(null), 0);102function shifted_udiv_truncate(y) {103  var yu = y>>>1;104  return (yu / yu)|0;105}106assertEq(shifted_udiv_truncate(5), 1);107assertEq(shifted_udiv_truncate(2), 1);108assertEq(shifted_udiv_truncate(1), 0);109assertEq(shifted_udiv_truncate(-1), 1);110assertEq(shifted_udiv_truncate(0), 0);111assertEq(shifted_udiv_truncate(-0), 0);112assertEq(shifted_udiv_truncate(1.1), 0);113assertEq(shifted_udiv_truncate(-1.1), 1);114assertEq(shifted_udiv_truncate(Infinity), 0);115assertEq(shifted_udiv_truncate(NaN), 0);116assertEq(shifted_udiv_truncate(undefined), 0);117assertEq(shifted_udiv_truncate(null), 0);118function udiv(y) {119  var yu = y>>>0;120  return yu / yu;121}122assertEq(udiv(5), 1);123assertEq(udiv(1), 1);124assertEq(udiv(-1), 1);125assertEq(udiv(0), NaN);126assertEq(udiv(-0), NaN);127assertEq(udiv(1.1), 1);128assertEq(udiv(-1.1), 1);129assertEq(udiv(Infinity), NaN);130assertEq(udiv(NaN), NaN);131assertEq(udiv(undefined), NaN);132assertEq(udiv(null), NaN);133function shifted_udiv(y) {134  var yu = y>>>1;135  return yu / yu;136}137assertEq(shifted_udiv(5), 1);138assertEq(shifted_udiv(2), 1);139assertEq(shifted_udiv(1), NaN);140assertEq(shifted_udiv(-1), 1);141assertEq(shifted_udiv(0), NaN);142assertEq(shifted_udiv(-0), NaN);143assertEq(shifted_udiv(1.1), NaN);144assertEq(shifted_udiv(-1.1), 1);145assertEq(shifted_udiv(Infinity), NaN);146assertEq(shifted_udiv(NaN), NaN);147assertEq(shifted_udiv(undefined), NaN);148assertEq(shifted_udiv(null), NaN);149function smod_truncate(y) {150  return (y % y)|0;151}152assertEq(smod_truncate(5), 0);153assertEq(smod_truncate(1), 0);154assertEq(smod_truncate(-1), 0);155assertEq(smod_truncate(0), 0);156assertEq(smod_truncate(-0), 0);157assertEq(smod_truncate(1.1), 0);158assertEq(smod_truncate(-1.1), 0);159assertEq(smod_truncate(Infinity), 0);160assertEq(smod_truncate(NaN), 0);161assertEq(smod_truncate(undefined), 0);162assertEq(smod_truncate(null), 0);163function smod(y) {164  return y % y;165}166assertEq(smod(5), 0);167assertEq(smod(1), 0);168assertEq(smod(-1), -0);169assertEq(smod(0), NaN);170assertEq(smod(-0), NaN);171assertEq(smod(1.1), 0);172assertEq(smod(-1.1), -0);173assertEq(smod(Infinity), NaN);174assertEq(smod(NaN), NaN);175assertEq(smod(undefined), NaN);176assertEq(smod(null), NaN);177function umod_truncate(y) {178  var yu = y>>>0;179  return (yu % yu)|0;180}181assertEq(umod_truncate(5), 0);182assertEq(umod_truncate(1), 0);183assertEq(umod_truncate(-1), 0);184assertEq(umod_truncate(0), 0);185assertEq(umod_truncate(-0), 0);186assertEq(umod_truncate(1.1), 0);187assertEq(umod_truncate(-1.1), 0);188assertEq(umod_truncate(Infinity), 0);189assertEq(umod_truncate(NaN), 0);190assertEq(umod_truncate(undefined), 0);191assertEq(umod_truncate(null), 0);192function shifted_umod_truncate(y) {193  var yu = y>>>1;194  return (yu % yu)|0;195}196assertEq(shifted_umod_truncate(5), 0);197assertEq(shifted_umod_truncate(2), 0);198assertEq(shifted_umod_truncate(1), 0);199assertEq(shifted_umod_truncate(-1), 0);200assertEq(shifted_umod_truncate(0), 0);201assertEq(shifted_umod_truncate(-0), 0);202assertEq(shifted_umod_truncate(1.1), 0);203assertEq(shifted_umod_truncate(-1.1), 0);204assertEq(shifted_umod_truncate(Infinity), 0);205assertEq(shifted_umod_truncate(NaN), 0);206assertEq(shifted_umod_truncate(undefined), 0);207assertEq(shifted_umod_truncate(null), 0);208function umod(y) {209  var yu = y>>>0;210  return yu % yu;211}212assertEq(umod(5), 0);213assertEq(umod(1), 0);214assertEq(umod(-1), 0);215assertEq(umod(0), NaN);216assertEq(umod(-0), NaN);217assertEq(umod(1.1), 0);218assertEq(umod(-1.1), 0);219assertEq(umod(Infinity), NaN);220assertEq(umod(NaN), NaN);221assertEq(umod(undefined), NaN);...

test_formal.py

Source:test_formal.py

...125    assert f.as_leading_term(x) == x126    assert f.polynomial(6) == x - x**2/2 + x**3/3 - x**4/4 + x**5/5127    k = f.ak.variables[0]128    assert f.infinite == Sum((-(-1)**(-k)*x**k)/k, (k, 1, oo))129    ft, s = f.truncate(n=None), f[:5]130    for i, t in enumerate(ft):131        if i == 5:132            break133        assert s[i] == t134    f = sin(x).fps(x)135    assert isinstance(f, FormalPowerSeries)136    assert f.truncate() == x - x**3/6 + x**5/120 + O(x**6)137    raises(NotImplementedError, lambda: fps(y*x))138    raises(ValueError, lambda: fps(x, dir=0))139def test_fps__rational():140    assert fps(1/x) == (1/x)141    assert fps((x**2 + x + 1) / x**3, dir=-1) == (x**2 + x + 1) / x**3142    f = 1 / ((x - 1)**2 * (x - 2))143    assert fps(f, x).truncate() == \144        (-Rational(1, 2) - 5*x/4 - 17*x**2/8 - 49*x**3/16 - 129*x**4/32 -145         321*x**5/64 + O(x**6))146    f = (1 + x + x**2 + x**3) / ((x - 1) * (x - 2))147    assert fps(f, x).truncate() == \148        (Rational(1, 2) + 5*x/4 + 17*x**2/8 + 49*x**3/16 + 113*x**4/32 +149         241*x**5/64 + O(x**6))150    f = x / (1 - x - x**2)151    assert fps(f, x, full=True).truncate() == \152        x + x**2 + 2*x**3 + 3*x**4 + 5*x**5 + O(x**6)153    f = 1 / (x**2 + 2*x + 2)154    assert fps(f, x, full=True).truncate() == \155        Rational(1, 2) - x/2 + x**2/4 - x**4/8 + x**5/8 + O(x**6)156    f = log(1 + x)157    assert fps(f, x).truncate() == \158        x - x**2/2 + x**3/3 - x**4/4 + x**5/5 + O(x**6)159    assert fps(f, x, dir=1).truncate() == fps(f, x, dir=-1).truncate()160    assert fps(f, x, 2).truncate() == \161        (log(3) - Rational(2, 3) - (x - 2)**2/18 + (x - 2)**3/81 -162         (x - 2)**4/324 + (x - 2)**5/1215 + x/3 + O((x - 2)**6, (x, 2)))163    assert fps(f, x, 2, dir=-1).truncate() == \164        (log(3) - Rational(2, 3) - (-x + 2)**2/18 - (-x + 2)**3/81 -165         (-x + 2)**4/324 - (-x + 2)**5/1215 + x/3 + O((x - 2)**6, (x, 2)))166    f = atan(x)167    assert fps(f, x, full=True).truncate() == x - x**3/3 + x**5/5 + O(x**6)168    assert fps(f, x, full=True, dir=1).truncate() == \169        fps(f, x, full=True, dir=-1).truncate()170    assert fps(f, x, 2, full=True).truncate() == \171        (atan(2) - Rational(2, 5) - 2*(x - 2)**2/25 + 11*(x - 2)**3/375 -172         6*(x - 2)**4/625 + 41*(x - 2)**5/15625 + x/5 + O((x - 2)**6, (x, 2)))173    assert fps(f, x, 2, full=True, dir=-1).truncate() == \174        (atan(2) - Rational(2, 5) - 2*(-x + 2)**2/25 - 11*(-x + 2)**3/375 -175         6*(-x + 2)**4/625 - 41*(-x + 2)**5/15625 + x/5 + O((x - 2)**6, (x, 2)))176    f = x*atan(x) - log(1 + x**2) / 2177    assert fps(f, x, full=True).truncate() == x**2/2 - x**4/12 + O(x**6)178    f = log((1 + x) / (1 - x)) / 2 - atan(x)179    assert fps(f, x, full=True).truncate(n=10) == 2*x**3/3 + 2*x**7/7 + O(x**10)180def test_fps__hyper():181    f = sin(x)182    assert fps(f, x).truncate() == x - x**3/6 + x**5/120 + O(x**6)183    f = cos(x)184    assert fps(f, x).truncate() == 1 - x**2/2 + x**4/24 + O(x**6)185    f = exp(x)186    assert fps(f, x).truncate() == \187        1 + x + x**2/2 + x**3/6 + x**4/24 + x**5/120 + O(x**6)188    f = atan(x)189    assert fps(f, x).truncate() == x - x**3/3 + x**5/5 + O(x**6)190    f = exp(acos(x))191    assert fps(f, x).truncate() == \192        (exp(pi/2) - x*exp(pi/2) + x**2*exp(pi/2)/2 - x**3*exp(pi/2)/3 +193         5*x**4*exp(pi/2)/24 - x**5*exp(pi/2)/6 + O(x**6))194    f = exp(acosh(x))195    assert fps(f, x).truncate() == I + x - I*x**2/2 - I*x**4/8 + O(x**6)196    f = atan(1/x)197    assert fps(f, x).truncate() == pi/2 - x + x**3/3 - x**5/5 + O(x**6)198    f = x*atan(x) - log(1 + x**2) / 2199    assert fps(f, x, rational=False).truncate() == x**2/2 - x**4/12 + O(x**6)200    f = log(1 + x)201    assert fps(f, x, rational=False).truncate() == \202        x - x**2/2 + x**3/3 - x**4/4 + x**5/5 + O(x**6)203    f = airyai(x**2)204    assert fps(f, x).truncate() == \205        (3**Rational(5, 6)*gamma(Rational(1, 3))/(6*pi) -206         3**Rational(2, 3)*x**2/(3*gamma(Rational(1, 3))) + O(x**6))207    f = exp(x)*sin(x)208    assert fps(f, x).truncate() == x + x**2 + x**3/3 - x**5/30 + O(x**6)209    f = exp(x)*sin(x)/x210    assert fps(f, x).truncate() == 1 + x + x**2/3 - x**4/30 - x**5/90 + O(x**6)211    f = sin(x) * cos(x)212    assert fps(f, x).truncate() == x - 2*x**3/3 + 2*x**5/15 + O(x**6)213def test_fps_shift():214    f = x**-5*sin(x)215    assert fps(f, x).truncate() == \216        1/x**4 - 1/(6*x**2) + S.One/120 - x**2/5040 + x**4/362880 + O(x**6)217    f = x**2*atan(x)218    assert fps(f, x, rational=False).truncate() == \219        x**3 - x**5/3 + O(x**6)220    f = cos(sqrt(x))*x221    assert fps(f, x).truncate() == \222        x - x**2/2 + x**3/24 - x**4/720 + x**5/40320 + O(x**6)223    f = x**2*cos(sqrt(x))224    assert fps(f, x).truncate() == \225        x**2 - x**3/2 + x**4/24 - x**5/720 + O(x**6)226def test_fps__Add_expr():227    f = x*atan(x) - log(1 + x**2) / 2228    assert fps(f, x).truncate() == x**2/2 - x**4/12 + O(x**6)229    f = sin(x) + cos(x) - exp(x) + log(1 + x)230    assert fps(f, x).truncate() == x - 3*x**2/2 - x**4/4 + x**5/5 + O(x**6)231    f = 1/x + sin(x)232    assert fps(f, x).truncate() == 1/x + x - x**3/6 + x**5/120 + O(x**6)233    f = sin(x) - cos(x) + 1/(x - 1)234    assert fps(f, x).truncate() == \235        -2 - x**2/2 - 7*x**3/6 - 25*x**4/24 - 119*x**5/120 + O(x**6)236def test_fps__asymptotic():237    f = exp(x)238    assert fps(f, x, oo) == f239    assert fps(f, x, -oo).truncate() == O(1/x**6, (x, oo))240    f = erf(x)241    assert fps(f, x, oo).truncate() == 1 + O(1/x**6, (x, oo))242    assert fps(f, x, -oo).truncate() == -1 + O(1/x**6, (x, oo))243    f = atan(x)244    assert fps(f, x, oo, full=True).truncate() == \245        -1/(5*x**5) + 1/(3*x**3) - 1/x + pi/2 + O(1/x**6, (x, oo))246    assert fps(f, x, -oo, full=True).truncate() == \247        -1/(5*x**5) + 1/(3*x**3) - 1/x - pi/2 + O(1/x**6, (x, oo))248    f = log(1 + x)249    assert fps(f, x, oo) != \250        (-1/(5*x**5) - 1/(4*x**4) + 1/(3*x**3) - 1/(2*x**2) + 1/x - log(1/x) +251         O(1/x**6, (x, oo)))252    assert fps(f, x, -oo) != \253        (-1/(5*x**5) - 1/(4*x**4) + 1/(3*x**3) - 1/(2*x**2) + 1/x + I*pi -254         log(-1/x) + O(1/x**6, (x, oo)))255def test_fps__fractional():256    f = sin(sqrt(x)) / x257    assert fps(f, x).truncate() == \258        (1/sqrt(x) - sqrt(x)/6 + x**Rational(3, 2)/120 -259         x**Rational(5, 2)/5040 + x**Rational(7, 2)/362880 -260         x**Rational(9, 2)/39916800 + x**Rational(11, 2)/6227020800 + O(x**6))261    f = sin(sqrt(x)) * x262    assert fps(f, x).truncate() == \263        (x**Rational(3, 2) - x**Rational(5, 2)/6 + x**Rational(7, 2)/120 -264         x**Rational(9, 2)/5040 + x**Rational(11, 2)/362880 + O(x**6))265    f = atan(sqrt(x)) / x**2266    assert fps(f, x).truncate() == \267        (x**Rational(-3, 2) - x**Rational(-1, 2)/3 + x**Rational(1, 2)/5 -268         x**Rational(3, 2)/7 + x**Rational(5, 2)/9 - x**Rational(7, 2)/11 +269         x**Rational(9, 2)/13 - x**Rational(11, 2)/15 + O(x**6))270    f = exp(sqrt(x))271    assert fps(f, x).truncate().expand() == \272        (1 + x/2 + x**2/24 + x**3/720 + x**4/40320 + x**5/3628800 + sqrt(x) +273         x**Rational(3, 2)/6 + x**Rational(5, 2)/120 + x**Rational(7, 2)/5040 +274         x**Rational(9, 2)/362880 + x**Rational(11, 2)/39916800 + O(x**6))275    f = exp(sqrt(x))*x276    assert fps(f, x).truncate().expand() == \277        (x + x**2/2 + x**3/24 + x**4/720 + x**5/40320 + x**Rational(3, 2) +278         x**Rational(5, 2)/6 + x**Rational(7, 2)/120 + x**Rational(9, 2)/5040 +279         x**Rational(11, 2)/362880 + O(x**6))280def test_fps__logarithmic_singularity():281    f = log(1 + 1/x)282    assert fps(f, x) != \283        -log(x) + x - x**2/2 + x**3/3 - x**4/4 + x**5/5 + O(x**6)284    assert fps(f, x, rational=False) != \285        -log(x) + x - x**2/2 + x**3/3 - x**4/4 + x**5/5 + O(x**6)286@XFAIL287def test_fps__logarithmic_singularity_fail():288    f = asech(x)  # Algorithms for computing limits probably needs improvemnts289    assert fps(f, x) == log(2) - log(x) - x**2/4 - 3*x**4/64 + O(x**6)290@XFAIL291def test_fps__symbolic():292    f = x**n*sin(x**2)293    assert fps(f, x).truncate(8) == x**2*x**n - x**6*x**n/6 + O(x**(n + 8), x)294    f = x**(n - 2)*cos(x)295    assert fps(f, x).truncate() == \296        (x**n*(-S(1)/2 + x**(-2)) + x**2*x**n/24 - x**4*x**n/720 +297         O(x**(n + 6), x))298    f = x**n*log(1 + x)299    fp = fps(f, x)300    k = fp.ak.variables[0]301    assert fp.infinite == \302        Sum((-(-1)**(-k)*x**k*x**n)/k, (k, 1, oo))303    f = x**(n - 2)*sin(x) + x**n*exp(x)304    assert fps(f, x).truncate() == \305        (x**n*(1 + 1/x) + 5*x*x**n/6 + x**2*x**n/2 + 7*x**3*x**n/40 +306         x**4*x**n/24 + 41*x**5*x**n/5040 + O(x**(n + 6), x))307    f = (x - 2)**n*log(1 + x)308    assert fps(f, x, 2).truncate() == \309        ((x - 2)**n*log(3) - (x - 2)**2*(x - 2)**n/18 +310         (x - 2)**3*(x - 2)**n/81 - (x - 2)**4*(x - 2)**n/324 +311         (x - 2)**5*(x - 2)**n/1215 + (x/3 - S(2)/3)*(x - 2)**n +312         O((x - 2)**(n + 6), (x, 2)))313    f = x**n*atan(x)314    assert fps(f, x, oo).truncate() == \315        (-x**n/(5*x**5) + x**n/(3*x**3) + x**n*(pi/2 - 1/x) +316         O(x**(n - 6), (x, oo)))317@slow318def test_fps__slow():319    f = x*exp(x)*sin(2*x)  # TODO: rsolve needs improvement320    assert fps(f, x).truncate() == 2*x**2 + 2*x**3 - x**4/3 - x**5 + O(x**6)321def test_fps__operations():322    f1, f2 = fps(sin(x)), fps(cos(x))323    fsum = f1 + f2324    assert fsum.function == sin(x) + cos(x)325    assert fsum.truncate() == \326        1 + x - x**2/2 - x**3/6 + x**4/24 + x**5/120 + O(x**6)327    fsum = f1 + 1328    assert fsum.function == sin(x) + 1329    assert fsum.truncate() == 1 + x - x**3/6 + x**5/120 + O(x**6)330    fsum = 1 + f2331    assert fsum.function == cos(x) + 1332    assert fsum.truncate() == 2 - x**2/2 + x**4/24 + O(x**6)333    assert (f1 + x) == Add(f1, x)334    assert -f2.truncate() == -1 + x**2/2 - x**4/24 + O(x**6)335    assert (f1 - f1) == S.Zero336    fsub = f1 - f2337    assert fsub.function == sin(x) - cos(x)338    assert fsub.truncate() == \339        -1 + x + x**2/2 - x**3/6 - x**4/24 + x**5/120 + O(x**6)340    fsub = f1 - 1341    assert fsub.function == sin(x) - 1342    assert fsub.truncate() == -1 + x - x**3/6 + x**5/120 + O(x**6)343    fsub = 1 - f2344    assert fsub.function == -cos(x) + 1345    assert fsub.truncate() == x**2/2 - x**4/24 + O(x**6)346    raises(ValueError, lambda: f1 + fps(exp(x), dir=-1))347    raises(ValueError, lambda: f1 + fps(exp(x), x0=1))348    fm = f1 * 3349    assert fm.function == 3*sin(x)350    assert fm.truncate() == 3*x - x**3/2 + x**5/40 + O(x**6)351    fm = 3 * f2352    assert fm.function == 3*cos(x)353    assert fm.truncate() == 3 - 3*x**2/2 + x**4/8 + O(x**6)354    assert (f1 * f2) == Mul(f1, f2)355    assert (f1 * x) == Mul(f1, x)356    fd = f1.diff()357    assert fd.function == cos(x)358    assert fd.truncate() == 1 - x**2/2 + x**4/24 + O(x**6)359    fd = f2.diff()360    assert fd.function == -sin(x)361    assert fd.truncate() == -x + x**3/6 - x**5/120 + O(x**6)362    fd = f2.diff().diff()363    assert fd.function == -cos(x)364    assert fd.truncate() == -1 + x**2/2 - x**4/24 + O(x**6)365    f3 = fps(exp(sqrt(x)))366    fd = f3.diff()367    assert fd.truncate().expand() == \368        (1/(2*sqrt(x)) + S(1)/2 + x/12 + x**2/240 + x**3/10080 + x**4/725760 +369         x**5/79833600 + sqrt(x)/4 + x**(S(3)/2)/48 + x**(S(5)/2)/1440 +370         x**(S(7)/2)/80640 + x**(S(9)/2)/7257600 + x**(S(11)/2)/958003200 +371         O(x**6))372    assert f1.integrate((x, 0, 1)) == -cos(1) + 1373    fi = f1.integrate(x)374    assert fi.function == -cos(x)375    assert fi.truncate() == -1 + x**2/2 - x**4/24 + O(x**6)376    fi = f2.integrate()377    assert fi.function == sin(x)...

text.py

Source:text.py

1import html.entities2import re3import unicodedata4from gzip import GzipFile5from io import BytesIO6from django.utils.functional import (7    SimpleLazyObject, keep_lazy, keep_lazy_text, lazy,8)9from django.utils.safestring import SafeText, mark_safe10from django.utils.translation import gettext as _, gettext_lazy, pgettext11@keep_lazy_text12def capfirst(x):13    """Capitalize the first letter of a string."""14    return x and str(x)[0].upper() + str(x)[1:]15# Set up regular expressions16re_words = re.compile(r'<.*?>|((?:\w[-\w]*|&.*?;)+)', re.S)17re_chars = re.compile(r'<.*?>|(.)', re.S)18re_tag = re.compile(r'<(/)?(\S+?)(?:(\s*/)|\s.*?)?>', re.S)19re_newlines = re.compile(r'\r\n|\r')  # Used in normalize_newlines20re_camel_case = re.compile(r'(((?<=[a-z])[A-Z])|([A-Z](?![A-Z]|$)))')21@keep_lazy_text22def wrap(text, width):23    """24    A word-wrap function that preserves existing line breaks. Expects that25    existing line breaks are posix newlines.26    Preserve all white space except added line breaks consume the space on27    which they break the line.28    Don't wrap long words, thus the output text may have lines longer than29    ``width``.30    """31    def _generator():32        for line in text.splitlines(True):  # True keeps trailing linebreaks33            max_width = min((line.endswith('\n') and width + 1 or width), width)34            while len(line) > max_width:35                space = line[:max_width + 1].rfind(' ') + 136                if space == 0:37                    space = line.find(' ') + 138                    if space == 0:39                        yield line40                        line = ''41                        break42                yield '%s\n' % line[:space - 1]43                line = line[space:]44                max_width = min((line.endswith('\n') and width + 1 or width), width)45            if line:46                yield line47    return ''.join(_generator())48class Truncator(SimpleLazyObject):49    """50    An object used to truncate text, either by characters or words.51    """52    def __init__(self, text):53        super().__init__(lambda: str(text))54    def add_truncation_text(self, text, truncate=None):55        if truncate is None:56            truncate = pgettext(57                'String to return when truncating text',58                '%(truncated_text)s...')59        if '%(truncated_text)s' in truncate:60            return truncate % {'truncated_text': text}61        # The truncation text didn't contain the %(truncated_text)s string62        # replacement argument so just append it to the text.63        if text.endswith(truncate):64            # But don't append the truncation text if the current text already65            # ends in this.66            return text67        return '%s%s' % (text, truncate)68    def chars(self, num, truncate=None, html=False):69        """70        Return the text truncated to be no longer than the specified number71        of characters.72        `truncate` specifies what should be used to notify that the string has73        been truncated, defaulting to a translatable string of an ellipsis74        (...).75        """76        self._setup()77        length = int(num)78        text = unicodedata.normalize('NFC', self._wrapped)79        # Calculate the length to truncate to (max length - end_text length)80        truncate_len = length81        for char in self.add_truncation_text('', truncate):82            if not unicodedata.combining(char):83                truncate_len -= 184                if truncate_len == 0:85                    break86        if html:87            return self._truncate_html(length, truncate, text, truncate_len, False)88        return self._text_chars(length, truncate, text, truncate_len)89    def _text_chars(self, length, truncate, text, truncate_len):90        """Truncate a string after a certain number of chars."""91        s_len = 092        end_index = None93        for i, char in enumerate(text):94            if unicodedata.combining(char):95                # Don't consider combining characters96                # as adding to the string length97                continue98            s_len += 199            if end_index is None and s_len > truncate_len:100                end_index = i101            if s_len > length:102                # Return the truncated string103                return self.add_truncation_text(text[:end_index or 0],104                                                truncate)105        # Return the original string since no truncation was necessary106        return text107    def words(self, num, truncate=None, html=False):108        """109        Truncate a string after a certain number of words. `truncate` specifies110        what should be used to notify that the string has been truncated,111        defaulting to ellipsis (...).112        """113        self._setup()114        length = int(num)115        if html:116            return self._truncate_html(length, truncate, self._wrapped, length, True)117        return self._text_words(length, truncate)118    def _text_words(self, length, truncate):119        """120        Truncate a string after a certain number of words.121        Strip newlines in the string.122        """123        words = self._wrapped.split()124        if len(words) > length:125            words = words[:length]126            return self.add_truncation_text(' '.join(words), truncate)127        return ' '.join(words)128    def _truncate_html(self, length, truncate, text, truncate_len, words):129        """130        Truncate HTML to a certain number of chars (not counting tags and131        comments), or, if words is True, then to a certain number of words.132        Close opened tags if they were correctly closed in the given HTML.133        Preserve newlines in the HTML.134        """135        if words and length <= 0:136            return ''137        html4_singlets = (138            'br', 'col', 'link', 'base', 'img',139            'param', 'area', 'hr', 'input'140        )141        # Count non-HTML chars/words and keep note of open tags142        pos = 0143        end_text_pos = 0144        current_len = 0145        open_tags = []146        regex = re_words if words else re_chars147        while current_len <= length:148            m = regex.search(text, pos)149            if not m:150                # Checked through whole string151                break152            pos = m.end(0)153            if m.group(1):154                # It's an actual non-HTML word or char155                current_len += 1156                if current_len == truncate_len:157                    end_text_pos = pos158                continue159            # Check for tag160            tag = re_tag.match(m.group(0))161            if not tag or current_len >= truncate_len:162                # Don't worry about non tags or tags after our truncate point163                continue164            closing_tag, tagname, self_closing = tag.groups()165            # Element names are always case-insensitive166            tagname = tagname.lower()167            if self_closing or tagname in html4_singlets:168                pass169            elif closing_tag:170                # Check for match in open tags list171                try:172                    i = open_tags.index(tagname)173                except ValueError:174                    pass175                else:176                    # SGML: An end tag closes, back to the matching start tag,177                    # all unclosed intervening start tags with omitted end tags178                    open_tags = open_tags[i + 1:]179            else:180                # Add it to the start of the open tags list181                open_tags.insert(0, tagname)182        if current_len <= length:183            return text184        out = text[:end_text_pos]185        truncate_text = self.add_truncation_text('', truncate)186        if truncate_text:187            out += truncate_text188        # Close any tags still open189        for tag in open_tags:190            out += '</%s>' % tag191        # Return string192        return out193@keep_lazy_text194def get_valid_filename(s):195    """196    Return the given string converted to a string that can be used for a clean197    filename. Remove leading and trailing spaces; convert other spaces to198    underscores; and remove anything that is not an alphanumeric, dash,199    underscore, or dot.200    >>> get_valid_filename("john's portrait in 2004.jpg")201    'johns_portrait_in_2004.jpg'202    """203    s = str(s).strip().replace(' ', '_')204    return re.sub(r'(?u)[^-\w.]', '', s)205@keep_lazy_text206def get_text_list(list_, last_word=gettext_lazy('or')):207    """208    >>> get_text_list(['a', 'b', 'c', 'd'])209    'a, b, c or d'210    >>> get_text_list(['a', 'b', 'c'], 'and')211    'a, b and c'212    >>> get_text_list(['a', 'b'], 'and')213    'a and b'214    >>> get_text_list(['a'])215    'a'216    >>> get_text_list([])217    ''218    """219    if len(list_) == 0:220        return ''221    if len(list_) == 1:222        return str(list_[0])223    return '%s %s %s' % (224        # Translators: This string is used as a separator between list elements225        _(', ').join(str(i) for i in list_[:-1]), str(last_word), str(list_[-1])226    )227@keep_lazy_text228def normalize_newlines(text):229    """Normalize CRLF and CR newlines to just LF."""230    return re_newlines.sub('\n', str(text))231@keep_lazy_text232def phone2numeric(phone):233    """Convert a phone number with letters into its numeric equivalent."""234    char2number = {235        'a': '2', 'b': '2', 'c': '2', 'd': '3', 'e': '3', 'f': '3', 'g': '4',236        'h': '4', 'i': '4', 'j': '5', 'k': '5', 'l': '5', 'm': '6', 'n': '6',237        'o': '6', 'p': '7', 'q': '7', 'r': '7', 's': '7', 't': '8', 'u': '8',238        'v': '8', 'w': '9', 'x': '9', 'y': '9', 'z': '9',239    }240    return ''.join(char2number.get(c, c) for c in phone.lower())241# From http://www.xhaus.com/alan/python/httpcomp.html#gzip242# Used with permission.243def compress_string(s):244    zbuf = BytesIO()245    with GzipFile(mode='wb', compresslevel=6, fileobj=zbuf, mtime=0) as zfile:246        zfile.write(s)247    return zbuf.getvalue()248class StreamingBuffer:249    def __init__(self):250        self.vals = []251    def write(self, val):252        self.vals.append(val)253    def read(self):254        if not self.vals:255            return b''256        ret = b''.join(self.vals)257        self.vals = []258        return ret259    def flush(self):260        return261    def close(self):262        return263# Like compress_string, but for iterators of strings.264def compress_sequence(sequence):265    buf = StreamingBuffer()266    with GzipFile(mode='wb', compresslevel=6, fileobj=buf, mtime=0) as zfile:267        # Output headers...268        yield buf.read()269        for item in sequence:270            zfile.write(item)271            data = buf.read()272            if data:273                yield data274    yield buf.read()275# Expression to match some_token and some_token="with spaces" (and similarly276# for single-quoted strings).277smart_split_re = re.compile(r"""278    ((?:279        [^\s'"]*280        (?:281            (?:"(?:[^"\\]|\\.)*" | '(?:[^'\\]|\\.)*')282            [^\s'"]*283        )+284    ) | \S+)285""", re.VERBOSE)286def smart_split(text):287    r"""288    Generator that splits a string by spaces, leaving quoted phrases together.289    Supports both single and double quotes, and supports escaping quotes with290    backslashes. In the output, strings will keep their initial and trailing291    quote marks and escaped quotes will remain escaped (the results can then292    be further processed with unescape_string_literal()).293    >>> list(smart_split(r'This is "a person\'s" test.'))294    ['This', 'is', '"a person\\\'s"', 'test.']295    >>> list(smart_split(r"Another 'person\'s' test."))296    ['Another', "'person\\'s'", 'test.']297    >>> list(smart_split(r'A "\"funky\" style" test.'))298    ['A', '"\\"funky\\" style"', 'test.']299    """300    for bit in smart_split_re.finditer(str(text)):301        yield bit.group(0)302def _replace_entity(match):303    text = match.group(1)304    if text[0] == '#':305        text = text[1:]306        try:307            if text[0] in 'xX':308                c = int(text[1:], 16)309            else:310                c = int(text)311            return chr(c)312        except ValueError:313            return match.group(0)314    else:315        try:316            return chr(html.entities.name2codepoint[text])317        except (ValueError, KeyError):318            return match.group(0)319_entity_re = re.compile(r"&(#?[xX]?(?:[0-9a-fA-F]+|\w{1,8}));")320@keep_lazy_text321def unescape_entities(text):322    return _entity_re.sub(_replace_entity, str(text))323@keep_lazy_text324def unescape_string_literal(s):325    r"""326    Convert quoted string literals to unquoted strings with escaped quotes and327    backslashes unquoted::328        >>> unescape_string_literal('"abc"')329        'abc'330        >>> unescape_string_literal("'abc'")331        'abc'332        >>> unescape_string_literal('"a \"bc\""')333        'a "bc"'334        >>> unescape_string_literal("'\'ab\' c'")335        "'ab' c"336    """337    if s[0] not in "\"'" or s[-1] != s[0]:338        raise ValueError("Not a string literal: %r" % s)339    quote = s[0]340    return s[1:-1].replace(r'\%s' % quote, quote).replace(r'\\', '\\')341@keep_lazy(str, SafeText)342def slugify(value, allow_unicode=False):343    """344    Convert to ASCII if 'allow_unicode' is False. Convert spaces to hyphens.345    Remove characters that aren't alphanumerics, underscores, or hyphens.346    Convert to lowercase. Also strip leading and trailing whitespace.347    """348    value = str(value)349    if allow_unicode:350        value = unicodedata.normalize('NFKC', value)351    else:352        value = unicodedata.normalize('NFKD', value).encode('ascii', 'ignore').decode('ascii')353    value = re.sub(r'[^\w\s-]', '', value).strip().lower()354    return mark_safe(re.sub(r'[-\s]+', '-', value))355def camel_case_to_spaces(value):356    """357    Split CamelCase and convert to lower case. Strip surrounding whitespace.358    """359    return re_camel_case.sub(r' \1', value).strip().lower()360def _format_lazy(format_string, *args, **kwargs):361    """362    Apply str.format() on 'format_string' where format_string, args,363    and/or kwargs might be lazy.364    """365    return format_string.format(*args, **kwargs)...

truncate.js

Source:truncate.js

1// Truncate text component module2'use strict';3var $ = require('jquery');4var debounce = require('../../services/debounce/debounce');5module.exports = function Truncate() {6    var truncate = {};7    /**8     * @example9     * <div id="truncate" style="overflow: hidden; line-height: 20px; max-height: 60px;">10     *    Lorem ipsum ...11     * </div>12     *13     * import Truncate from '@sulu/web/packages/components/truncate';14     * var component = new Truncate();15     * component.initialize(document.getElementById('truncate'), {});16     *17     * @param {HTMLElement} el18     * @param {object} options19     */20    truncate.initialize = function initialize(el, options) {21        truncate.$el = $(el);22        // Set default options if no custom options are defined23        truncate.separator = options.separator || ' ...';24        truncate.debounceDelay = options.debounceDelay || 250;25        truncate.text = truncate.$el.text().trim();26        truncate.$inner = $('<span></span>').text(truncate.text).css('display', 'block');27        truncate.$el.html(truncate.$inner).css('display', 'block');28        truncate.calculateRegex();29        truncate.calculateText();30        $(window).on('load resize', debounce(truncate.calculateText, truncate.debounceDelay));31    };32    /**33     * Calculate regex based on the separator.34     */35    truncate.calculateRegex = function calculateRegex() {36        var separatorRegex = truncate.separator.split('').map(c => '\\' + c).join('');37        truncate.regex = new RegExp('\\W*\\s?(?:\\S*|\\S*' + separatorRegex + ')$');38    };39    /**40     * Calculate output text based on the element's height.41     */42    truncate.calculateText = function calculateText() {43        var height;44        truncate.$inner.text(truncate.text);45        height = truncate.$el.height();46        while (truncate.$inner.outerHeight() > height) {47            truncate.$inner.text(function(index, text) {48                if (text === truncate.separator) {49                    return '';50                }51                return text.replace(truncate.regex, truncate.separator);52            });53        }54    };55    return {56        initialize: truncate.initialize,57    };...

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