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ScoDoc/app/scodoc/TrivialFormulator.py

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2020-09-26 16:19:37 +02:00
# -*- mode: python -*-
# -*- coding: utf-8 -*-
"""Simple form generator/validator
E. Viennet 2005 - 2008
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v 1.3 (python3)
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"""
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import html
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def TrivialFormulator(
form_url,
values,
formdescription=(),
initvalues={},
method="post",
enctype=None,
submitlabel="OK",
name=None,
formid="tf",
cssclass="",
cancelbutton=None,
submitbutton=True,
submitbuttonattributes=[],
top_buttons=False, # place buttons at top of form
bottom_buttons=True, # buttons after form
html_foot_markup="",
readonly=False,
is_submitted=False,
):
"""
form_url : URL for this form
initvalues : dict giving default values
values : dict with all HTML form variables (may start empty)
is_submitted: handle form as if already submitted
Returns (status, HTML form, values)
status = 0 (html to display),
1 (ok, validated values in "values")
-1 cancel (if cancelbutton specified)
HTML form: html string (form to insert in your web page)
values: None or, when the form is submitted and correctly filled,
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a dictionnary with the requeted values.
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formdescription: sequence [ (field, description), ... ]
where description is a dict with following (optional) keys:
default : default value for this field ('')
title : text titre (default to field name)
allow_null : if true, field can be left empty (default true)
type : 'string', 'int', 'float' (default to string), 'list' (only for hidden)
readonly : default False. if True, no form element, display current value.
convert_numbers: covert int and float values (from string)
allowed_values : list of possible values (default: any value)
validator : function validating the field (called with (value,field)).
min_value : minimum value (for floats and ints)
max_value : maximum value (for floats and ints)
explanation: text string to display next the input widget
title_buble: help bubble on field title (needs bubble.js or equivalent)
comment : comment, showed under input widget
withcheckbox: if true, place a checkbox at the left of the input
elem. Checked items will be returned in 'tf-checked'
attributes: a liste of strings to put in the HTML form element
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template: HTML template for element
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HTML elements:
input_type : 'text', 'textarea', 'password',
'radio', 'menu', 'checkbox',
'hidden', 'separator', 'file', 'date', 'boolcheckbox',
'text_suggest'
(default text)
size : text field width
rows, cols: textarea geometry
labels : labels for radio or menu lists (associated to allowed_values)
vertical: for checkbox; if true, vertical layout
disabled_items: for checkbox, dict such that disabled_items[i] true if disabled checkbox
To use text_suggest elements, one must:
- specify options in text_suggest_options (a dict)
- HTML page must load JS AutoSuggest.js and CSS autosuggest_inquisitor.css
- bodyOnLoad must call JS function init_tf_form(formid)
"""
method = method.lower()
if method == "get":
enctype = None
t = TF(
form_url,
values,
formdescription,
initvalues,
method,
enctype,
submitlabel,
name,
formid,
cssclass,
cancelbutton=cancelbutton,
submitbutton=submitbutton,
submitbuttonattributes=submitbuttonattributes,
top_buttons=top_buttons,
bottom_buttons=bottom_buttons,
html_foot_markup=html_foot_markup,
readonly=readonly,
is_submitted=is_submitted,
)
form = t.getform()
if t.canceled():
res = -1
elif t.submitted() and t.result:
res = 1
else:
res = 0
return res, form, t.result
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class TF(object):
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def __init__(
self,
form_url,
values,
formdescription=[],
initvalues={},
method="POST",
enctype=None,
submitlabel="OK",
name=None,
formid="tf",
cssclass="",
cancelbutton=None,
submitbutton=True,
submitbuttonattributes=[],
top_buttons=False, # place buttons at top of form
bottom_buttons=True, # buttons after form
html_foot_markup="", # html snippet put at the end, just after the table
readonly=False,
is_submitted=False,
):
self.form_url = form_url
self.values = values
self.formdescription = list(formdescription)
self.initvalues = initvalues
self.method = method
self.enctype = enctype
self.submitlabel = submitlabel
if name:
self.name = name
else:
self.name = formid # 'tf'
self.formid = formid
self.cssclass = cssclass
self.cancelbutton = cancelbutton
self.submitbutton = submitbutton
self.submitbuttonattributes = submitbuttonattributes
self.top_buttons = top_buttons
self.bottom_buttons = bottom_buttons
self.html_foot_markup = html_foot_markup
self.readonly = readonly
self.result = None
self.is_submitted = is_submitted
if readonly:
self.top_buttons = self.bottom_buttons = False
self.cssclass += " readonly"
def submitted(self):
"true if form has been submitted"
if self.is_submitted:
return True
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return self.values.get("%s_submitted" % self.formid, False)
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def canceled(self):
"true if form has been canceled"
return self.values.get("%s_cancel" % self.formid, False)
def getform(self):
"return HTML form"
R = []
msg = None
self.setdefaultvalues()
if self.submitted() and not self.readonly:
msg = self.checkvalues()
# display error message
R.append(tf_error_message(msg))
# form or view
if self.readonly:
R = R + self._ReadOnlyVersion(self.formdescription)
else:
R = R + self._GenForm()
#
return "\n".join(R)
__str__ = getform
__repr__ = getform
def setdefaultvalues(self):
"set default values and convert numbers to strings"
for (field, descr) in self.formdescription:
# special case for boolcheckbox
if descr.get("input_type", None) == "boolcheckbox" and self.submitted():
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if field not in self.values:
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self.values[field] = 0
else:
self.values[field] = 1
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if field not in self.values:
if "default" in descr: # first: default in form description
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self.values[field] = descr["default"]
else: # then: use initvalues dict
self.values[field] = self.initvalues.get(field, "")
if self.values[field] == None:
self.values[field] = ""
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# convert numbers, except ids
if field.endswith("id") and self.values[field]:
# enforce integer ids:
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try:
self.values[field] = int(self.values[field])
except ValueError:
pass
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elif isinstance(self.values[field], (int, float)):
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self.values[field] = str(self.values[field])
#
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if "tf-checked" not in self.values:
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if self.submitted():
# si rien n'est coché, tf-checked n'existe plus dans la reponse
self.values["tf-checked"] = []
else:
self.values["tf-checked"] = self.initvalues.get("tf-checked", [])
self.values["tf-checked"] = [str(x) for x in self.values["tf-checked"]]
def checkvalues(self):
"check values. Store .result and returns msg"
ok = 1
msg = []
for (field, descr) in self.formdescription:
val = self.values[field]
# do not check "unckecked" items
if descr.get("withcheckbox", False):
if not field in self.values["tf-checked"]:
continue
# null values
allow_null = descr.get("allow_null", True)
if not allow_null:
if val == "" or val == None:
msg.append(
"Le champ '%s' doit être renseigné" % descr.get("title", field)
)
ok = 0
# type
typ = descr.get("type", "string")
if val != "" and val != None:
# check only non-null values
if typ[:3] == "int":
try:
val = int(val)
self.values[field] = val
except:
msg.append(
"La valeur du champ '%s' doit être un nombre entier" % field
)
ok = 0
elif typ == "float" or typ == "real":
self.values[field] = self.values[field].replace(",", ".")
try:
val = float(val.replace(",", ".")) # allow ,
self.values[field] = val
except:
msg.append(
"La valeur du champ '%s' doit être un nombre" % field
)
ok = 0
if typ[:3] == "int" or typ == "float" or typ == "real":
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if "min_value" in descr and val < descr["min_value"]:
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msg.append(
"La valeur (%d) du champ '%s' est trop petite (min=%s)"
% (val, field, descr["min_value"])
)
ok = 0
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if "max_value" in descr and val > descr["max_value"]:
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msg.append(
"La valeur (%s) du champ '%s' est trop grande (max=%s)"
% (val, field, descr["max_value"])
)
ok = 0
# allowed values
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if "allowed_values" in descr:
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if descr.get("input_type", None) == "checkbox":
# for checkboxes, val is a list
for v in val:
if not v in descr["allowed_values"]:
msg.append(
"valeur invalide (%s) pour le champ '%s'" % (val, field)
)
ok = 0
elif descr.get("input_type", None) == "boolcheckbox":
pass
elif not val in descr["allowed_values"]:
msg.append("valeur invalide (%s) pour le champ '%s'" % (val, field))
ok = 0
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if "validator" in descr:
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if not descr["validator"](val, field):
msg.append("valeur invalide (%s) pour le champ '%s'" % (val, field))
ok = 0
# boolean checkbox
if descr.get("input_type", None) == "boolcheckbox":
if int(val):
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self.values[field] = True
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else:
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self.values[field] = False
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# open('/tmp/toto','a').write('checkvalues: val=%s (%s) values[%s] = %s\n' % (val, type(val), field, self.values[field]))
if descr.get("convert_numbers", False):
if typ[:3] == "int":
self.values[field] = int(self.values[field])
elif typ == "float" or typ == "real":
self.values[field] = float(self.values[field].replace(",", "."))
if ok:
self.result = self.values
else:
self.result = None
return msg
def _GenForm(self, method="", enctype=None, form_url=""):
values = self.values
add_no_enter_js = False # add JS function to prevent 'enter' -> submit
# form template
# default template for each input element
itemtemplate = """<tr%(item_dom_attr)s>
<td class="tf-fieldlabel">%(label)s</td><td class="tf-field">%(elem)s</td>
</tr>
"""
hiddenitemtemplate = "%(elem)s"
separatortemplate = '<tr%(item_dom_attr)s><td colspan="2">%(label)s</td></tr>'
# ---- build form
buttons_markup = ""
if self.submitbutton:
buttons_markup += (
'<input type="submit" name="%s_submit" id="%s_submit" value="%s" %s/>'
% (
self.formid,
self.formid,
self.submitlabel,
" ".join(self.submitbuttonattributes),
)
)
if self.cancelbutton:
buttons_markup += (
' <input type="submit" name="%s_cancel" id="%s_cancel" value="%s"/>'
% (self.formid, self.formid, self.cancelbutton)
)
R = []
suggest_js = []
if self.enctype is None:
if self.method == "post":
enctype = "multipart/form-data"
else:
enctype = "application/x-www-form-urlencoded"
if self.cssclass:
klass = ' class="%s"' % self.cssclass
else:
klass = ""
name = self.name
R.append(
'<form action="%s" method="%s" id="%s" enctype="%s" name="%s" %s>'
% (self.form_url, self.method, self.formid, enctype, name, klass)
)
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R.append('<input type="hidden" name="%s_submitted" value="1"/>' % self.formid)
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if self.top_buttons:
R.append(buttons_markup + "<p></p>")
R.append('<table class="tf">')
idx = 0
for idx in range(len(self.formdescription)):
(field, descr) = self.formdescription[idx]
if descr.get("readonly", False):
R.append(self._ReadOnlyElement(field, descr))
continue
wid = self.name + "_" + field
size = descr.get("size", 12)
rows = descr.get("rows", 5)
cols = descr.get("cols", 60)
title = descr.get("title", field.capitalize())
title_bubble = descr.get("title_bubble", None)
withcheckbox = descr.get("withcheckbox", False)
input_type = descr.get("input_type", "text")
item_dom_id = descr.get("dom_id", "")
if item_dom_id:
item_dom_attr = ' id="%s"' % item_dom_id
else:
item_dom_attr = ""
# choix du template
etempl = descr.get("template", None)
if etempl is None:
if input_type == "hidden":
etempl = hiddenitemtemplate
elif input_type == "separator":
etempl = separatortemplate
R.append(etempl % {"label": title, "item_dom_attr": item_dom_attr})
continue
else:
etempl = itemtemplate
lab = []
lem = []
if withcheckbox and input_type != "hidden":
if field in values["tf-checked"]:
checked = 'checked="checked"'
else:
checked = ""
lab.append(
'<input type="checkbox" name="%s:list" value="%s" onclick="tf_enable_elem(this)" %s/>'
% ("tf-checked", field, checked)
)
if title_bubble:
lab.append(
'<a class="discretelink" href="" title="%s">%s</a>'
% (title_bubble, title)
)
else:
lab.append(title)
#
attribs = " ".join(descr.get("attributes", []))
if (
withcheckbox and not checked
) or not descr.get( # desactive les element non coches:
"enabled", True
):
attribs += ' disabled="true"'
#
if input_type == "text":
lem.append(
'<input type="text" name="%s" size="%d" id="%s" %s'
% (field, size, wid, attribs)
)
if descr.get("return_focus_next", False): # and nextitemname:
# JS code to focus on next element on 'enter' key
# ceci ne marche que pour desactiver enter sous IE (pas Firefox)
# lem.append('''onKeyDown="if(event.keyCode==13){
# event.cancelBubble = true; event.returnValue = false;}"''')
lem.append('onkeypress="return enter_focus_next(this, event);"')
add_no_enter_js = True
# lem.append('onchange="document.%s.%s.focus()"'%(name,nextitemname))
# lem.append('onblur="document.%s.%s.focus()"'%(name,nextitemname))
lem.append(('value="%(' + field + ')s" />') % values)
elif input_type == "password":
lem.append(
'<input type="password" name="%s" id="%s" size="%d" %s'
% (field, wid, size, attribs)
)
lem.append(('value="%(' + field + ')s" />') % values)
elif input_type == "radio":
labels = descr.get("labels", descr["allowed_values"])
for i in range(len(labels)):
if descr["allowed_values"][i] == values[field]:
checked = 'checked="checked"'
else:
checked = ""
lem.append(
'<input type="radio" name="%s" value="%s" %s %s>%s</input>'
% (
field,
descr["allowed_values"][i],
checked,
attribs,
labels[i],
)
)
elif input_type == "menu":
lem.append('<select name="%s" id="%s" %s>' % (field, wid, attribs))
labels = descr.get("labels", descr["allowed_values"])
for i in range(len(labels)):
if str(descr["allowed_values"][i]) == str(values[field]):
selected = "selected"
else:
selected = ""
lem.append(
'<option value="%s" %s>%s</option>'
% (descr["allowed_values"][i], selected, labels[i])
)
lem.append("</select>")
elif input_type == "checkbox" or input_type == "boolcheckbox":
if input_type == "checkbox":
labels = descr.get("labels", descr["allowed_values"])
else: # boolcheckbox
labels = [""]
descr["allowed_values"] = ["0", "1"]
vertical = descr.get("vertical", False)
disabled_items = descr.get("disabled_items", {})
if vertical:
lem.append("<table>")
for i in range(len(labels)):
if input_type == "checkbox":
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# from app.scodoc.sco_utils import log # debug only
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# log('checkbox: values[%s] = "%s"' % (field,repr(values[field]) ))
# log("descr['allowed_values'][%s] = '%s'" % (i, repr(descr['allowed_values'][i])))
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if (
values[field]
and descr["allowed_values"][i] in values[field]
):
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checked = 'checked="checked"'
else:
checked = ""
else: # boolcheckbox
# open('/tmp/toto','a').write('GenForm: values[%s] = %s (%s)\n' % (field, values[field], type(values[field])))
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if values[field] == "True":
v = True
elif values[field] == "False":
v = False
else:
try:
v = int(values[field])
except:
v = False
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if v:
checked = 'checked="checked"'
else:
checked = ""
if vertical:
lem.append("<tr><td>")
if disabled_items.get(i, False):
disab = 'disabled="1"'
ilab = (
'<span class="tf-label-disabled">'
+ labels[i]
+ "</span> <em>(non modifiable)</em>"
)
else:
disab = ""
ilab = "<span>" + labels[i] + "</span>"
lem.append(
'<input type="checkbox" name="%s:list" value="%s" %s %s %s>%s</input>'
% (
field,
descr["allowed_values"][i],
attribs,
disab,
checked,
ilab,
)
)
if vertical:
lem.append("</tr></td>")
if vertical:
lem.append("</table>")
elif input_type == "textarea":
lem.append(
'<textarea name="%s" id="%s" rows="%d" cols="%d" %s>%s</textarea>'
% (field, wid, rows, cols, attribs, values[field])
)
elif input_type == "hidden":
if descr.get("type", "") == "list":
for v in values[field]:
lem.append(
'<input type="hidden" name="%s:list" value="%s" %s />'
% (field, v, attribs)
)
else:
lem.append(
'<input type="hidden" name="%s" id="%s" value="%s" %s />'
% (field, wid, values[field], attribs)
)
elif input_type == "separator":
pass
elif input_type == "file":
lem.append(
'<input type="file" name="%s" size="%s" value="%s" %s/>'
% (field, size, values[field], attribs)
)
elif input_type == "date": # JavaScript widget for date input
lem.append(
'<input type="text" name="%s" size="10" value="%s" class="datepicker"/>'
% (field, values[field])
)
elif input_type == "text_suggest":
lem.append(
'<input type="text" name="%s" id="%s" size="%d" %s'
% (field, field, size, attribs)
)
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lem.append(('value="%(' + field + ')s" />') % values)
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suggest_js.append(
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f"""var {field}_opts = {dict2js(descr.get("text_suggest_options", {}))};
var {field}_as = new bsn.AutoSuggest('{field}', {field}_opts);
"""
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)
else:
raise ValueError("unkown input_type for form (%s)!" % input_type)
explanation = descr.get("explanation", "")
if explanation:
lem.append('<span class="tf-explanation">%s</span>' % explanation)
comment = descr.get("comment", "")
if comment:
lem.append('<br/><span class="tf-comment">%s</span>' % comment)
R.append(
etempl
% {
"label": "\n".join(lab),
"elem": "\n".join(lem),
"item_dom_attr": item_dom_attr,
}
)
R.append("</table>")
R.append(self.html_foot_markup)
if self.bottom_buttons:
R.append("<br/>" + buttons_markup)
if add_no_enter_js:
R.append(
"""<script type="text/javascript">
function enter_focus_next (elem, event) {
var cod = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
var enter = false;
if (event.keyCode == 13)
enter = true;
if (event.which == 13)
enter = true;
if (event.charCode == 13)
enter = true;
if (enter) {
var focused = false;
var i;
for (i = 0; i < elem.form.elements.length; i++)
if (elem == elem.form.elements[i])
break;
i = i + 1;
while (i < elem.form.elements.length) {
if ((elem.form.elements[i].type == "text")
&& (!(elem.form.elements[i].disabled))
&& ($(elem.form.elements[i]).is(':visible')))
{
elem.form.elements[i].focus();
focused = true;
break;
}
i = i + 1;
}
if (!focused) {
elem.blur();
}
return false;
}
else
return true;
}</script>
"""
) # enter_focus_next, ne focus que les champs text
if suggest_js:
# nota: formid is currently ignored
# => only one form with text_suggest field on a page.
R.append(
"""<script type="text/javascript">
function init_tf_form(formid) {
%s
}
</script>"""
% "\n".join(suggest_js)
)
# Javascript common to all forms:
R.append(
"""<script type="text/javascript">
// controle par la checkbox
function tf_enable_elem(checkbox) {
var oid = checkbox.value;
if (oid) {
var elem = document.getElementById(oid);
if (elem) {
if (checkbox.checked) {
elem.disabled = false;
} else {
elem.disabled = true;
}
}
}
}
// Selections etendues avec shift (use jquery.field)
$('input[name="tf-checked:list"]').createCheckboxRange();
</script>"""
)
R.append("</form>")
return R
def _ReadOnlyElement(self, field, descr):
"Generate HTML for an element, read-only"
R = []
title = descr.get("title", field.capitalize())
input_type = descr.get("input_type", "text")
klass = descr.get("cssclass", "")
klass = " " + klass
if input_type == "hidden":
return ""
R.append('<tr class="tf-ro-tr%s">' % klass)
if input_type == "separator": # separator
R.append('<td colspan="2">%s' % title)
else:
R.append('<td class="tf-ro-fieldlabel%s">' % klass)
R.append("%s</td>" % title)
R.append('<td class="tf-ro-field%s">' % klass)
if input_type == "text" or input_type == "text_suggest":
R.append(("%(" + field + ")s") % self.values)
elif input_type in ("radio", "menu", "checkbox", "boolcheckbox"):
if input_type == "boolcheckbox":
labels = descr.get(
"labels", descr.get("allowed_values", ["oui", "non"])
)
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_val = self.values[field]
if isinstance(_val, bool):
bool_val = 1 if _val else 0
elif _val == "False":
bool_val = 0
elif _val:
bool_val = 1
else:
bool_val = 0
R.append(labels[bool_val])
if bool_val:
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R.append('<input type="hidden" name="%s" value="1"/>' % field)
else:
labels = descr.get("labels", descr["allowed_values"])
for i in range(len(labels)):
if str(descr["allowed_values"][i]) == str(self.values[field]):
R.append('<span class="tf-ro-value">%s</span>' % labels[i])
elif input_type == "textarea":
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R.append(
'<div class="tf-ro-textarea">%s</div>' % html.escape(self.values[field])
)
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elif input_type == "separator" or input_type == "hidden":
pass
elif input_type == "file":
R.append("'%s'" % self.values[field])
else:
raise ValueError("unkown input_type for form (%s)!" % input_type)
explanation = descr.get("explanation", "")
if explanation:
R.append('<span class="tf-explanation">%s</span>' % explanation)
R.append("</td></tr>")
return "\n".join(R)
def _ReadOnlyVersion(self, formdescription):
"Generate HTML for read-only view of the form"
R = ['<table class="tf-ro">']
for (field, descr) in formdescription:
R.append(self._ReadOnlyElement(field, descr))
R.append("</table>")
return R
def dict2js(d):
"""convert Python dict to JS code"""
r = []
for k in d:
v = d[k]
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if isinstance(v, bool):
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if v:
v = "true"
else:
v = "false"
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elif isinstance(v, str): # ne marchera pas en python2
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v = '"' + v + '"'
r.append("%s: %s" % (k, v))
return "{" + ",\n".join(r) + "}"
def tf_error_message(msg):
"""html for form error message"""
if not msg:
return ""
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if isinstance(msg, str):
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msg = [msg]
return (
'<ul class="tf-msg"><li class="tf-msg error-message">%s</li></ul>'
% '</li><li class="tf-msg tf-msg error-message">'.join(msg)
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)