Move cursor in TextView.py

Move cursor in TextView.py

import ui
from objc_util import *
import clipboard
import speech

v = ui.View()
v.frame = (0,0,500,320)
v.name = 'Move cursor in TextView'

tv = ui.TextView()
tv.name = 'TextView'
tv.frame = (120,10,370,140)
tv.font = ('Arial Rounded MT Bold',24)
tv.text = 'aé😢🇯🇵👨‍👨‍👧‍👩‍🎨'
v.add_subview(tv)

tv2 = ui.TextView()
tv2.name = 'TextView2'
tv2.frame = (120,160,370,140)
tv2.font = ('Arial Rounded MT Bold',24)
tv2.text = 'second'
v.add_subview(tv2)

def say_char(tv):
	# test speech character at cursor
	idxtopos = IndexToPos(tv,'') # list index to position
	i = tv.selected_range[0]
	#print(i,idxtopos)
	i = idxtopos[i] # used to check if same base character
	if i < len(tv.text):
		c = tv.text[i]
		if c == ' ':
			c ='space'
		speech.say(c,'jp-JP')

def selected_range(tv,i):
	tvo = ObjCInstance(tv)
	p1 = tvo.positionFromPosition_offset_(tvo.beginningOfDocument(), i)
	p2 = p1
	#p2 = tvo.positionFromPosition_offset_(tvo.beginningOfDocument(), i+1)
	tvo.selectedTextRange = tvo.textRangeFromPosition_toPosition_(p1, p2)
	say_char(tv)
	return

# some emoji like flags count as 2 for len but as 4 for selected_range
def IndexToPos(tv,type):
    tvo = ObjCInstance(tv)
    # build array index -> position in range
    idxtopos = []
    pre_x = -1
    #print(tv.text)
    i = 0
    for c in tv.text:
      # nbr characters used e=1 é=1 😂=1 🇯🇵=2 👨‍👨‍👧‍👧=7
      # some emoji generate more than one character, 
      # sometimes counted for more than one in range
      # 1,2,3->1  4->2
      nb = 1 + int(len(c.encode('utf-8'))/4)
      for j in range(0,nb):
        p1 = tvo.positionFromPosition_offset_(tvo.beginningOfDocument(), len(idxtopos))
        p2 = p1
        rge = tvo.textRangeFromPosition_toPosition_(p1, p2)
        rect = tvo.firstRectForRange_(rge)	# CGRect
        x = rect.origin.x
        if x == float('inf') or x == pre_x:
          # same x as previous one, composed character
          pass
        else:
          pre_x = x
          i = len(idxtopos)
        idxtopos.append(i)						# start position of c
      #print(c,nb,len(idxtopos)-1,i,x)
    idxtopos.append(i+1)							# end position of last c
    #print(idxtopos)
    # get index of actual cursor
    i = tv.selected_range[0] 				# actual position of cursor
    # often p is one of sub_chars, not always the first one
    p = idxtopos[i]									# used to check if same base character
    #print(p,i,idxtopos)
    if type == 'left':
      if i == 0:
        return												# already before character
      while True:
        i = i - 1
        if idxtopos[i] != p:
          q = idxtopos[i]
          # seach first sub-character
          while i > 0:
            if idxtopos[i-1] != q:
              break
            i = i - 1
        break
    elif type == 'right':
      if i == (len(idxtopos)-1):
        return												# already after last character
      while True:
        i = i + 1
        if idxtopos[i] != p:
          break
    elif type == 'end':
      i = len(idxtopos)-1
    else:
      return idxtopos
    r = idxtopos[i]
    selected_range(tv,i)
    return idxtopos

b_top = ui.Button()
b_top.frame = (10,10,100,32)
b_top.title = 'begin'
b_top.background_color = 'white'
b_top.border_width = 1
def b_top_action(sender):
    name = str(ObjCClass('UIApplication').sharedApplication().keyWindow().firstResponder().name())
    tv = sender.superview[name]
    tv.selected_range = (0,0)
    say_char(tv)
b_top.action = b_top_action
v.add_subview(b_top)

b_left = ui.Button()
b_left.frame = (10,50,100,32)
b_left.title = 'left'
b_left.background_color = 'white'
b_left.border_width = 1
def b_left_action(sender):
    name = str(ObjCClass('UIApplication').sharedApplication().keyWindow().firstResponder().name())
    tv = sender.superview[name]
    idxtopos = IndexToPos(tv,'left')		# list index to position
b_left.action = b_left_action
v.add_subview(b_left)

b_right = ui.Button()
b_right.frame = (10,90,100,32)
b_right.title = 'right'
b_right.background_color = 'white'
b_right.border_width = 1
def b_right_action(sender):
    name = str(ObjCClass('UIApplication').sharedApplication().keyWindow().firstResponder().name())
    tv = sender.superview[name]
    idxtopos = IndexToPos(tv,'right')		# list index to position
b_right.action = b_right_action
v.add_subview(b_right)

b_bottom = ui.Button()
b_bottom.frame = (10,130,100,32)
b_bottom.title = 'end'
b_bottom.background_color = 'white'
b_bottom.border_width = 1
def b_bottom_action(sender):
    name = str(ObjCClass('UIApplication').sharedApplication().keyWindow().firstResponder().name())
    tv = sender.superview[name]
    idxtopos = IndexToPos(tv,'end')		# list index to position
b_bottom.action = b_bottom_action
v.add_subview(b_bottom)

def get_xy(tv):
    idxtopos = IndexToPos(tv,'')		# list index to position
    tvo = ObjCInstance(tv)
    x_y = []
    for i in range(0,len(idxtopos)+1):	# x,y of each character
      p1 = tvo.positionFromPosition_offset_(tvo.beginningOfDocument(), i)
      rge = tvo.textRangeFromPosition_toPosition_(p1,p1)
      rect = tvo.firstRectForRange_(rge)	# CGRect
      x,y = rect.origin.x,rect.origin.y
      if i == len(idxtopos):
        if i > 0:
          x,y = x_y[i-1]
        else:
          # text is empty
          x,y = 0,0
      if x == float('inf'):
        x,y = x_prec+15,y_prec
      x_prec,y_prec = x,y
      x_y.append((x,y))
    return x_y
    
b_up = ui.Button()
b_up.frame = (10,170,100,32)
b_up.title = 'up'
b_up.background_color = 'white'
b_up.border_width = 1
def b_up_action(sender):
    name = str(ObjCClass('UIApplication').sharedApplication().keyWindow().firstResponder().name())
    tv = sender.superview[name]
    x_y = get_xy(tv)
    c = tv.selected_range[0] 
    xc,yc = x_y[c]
    i = c - 1
    while i >=  0:
      x,y = x_y[i]
      if y < yc:
        # previous row
        if x <= xc:
          selected_range(tv,i)
          return
      i = i - 1
b_up.action = b_up_action
v.add_subview(b_up)

b_down = ui.Button()
b_down.frame = (10,210,100,32)
b_down.title = 'down'
b_down.background_color = 'white'
b_down.border_width = 1
def b_down_action(sender):
    name = str(ObjCClass('UIApplication').sharedApplication().keyWindow().firstResponder().name())
    tv = sender.superview[name]
    idxtopos = IndexToPos(tv,'')		# list index to position
    x_y = get_xy(tv)
    c = tv.selected_range[0] 
    #print(x_y,c)
    xc,yc = x_y[c]
    i = c# - 1			# I don't remember why this "- 1"
    while i < len(idxtopos):
      x,y = x_y[i]
      if y > yc:
        # next row
        if x >= xc:
          selected_range(tv,i)
          return
        else:
          if (i+1) < len(idxtopos):
            if x_y[i+1][1] > y: # i = last character of row under cursor
              selected_range(tv,i)
              return
            else:
              pass	# try next x
          else:
            # last character of last row
            selected_range(tv,i)
            return
      i = i + 1
b_down.action = b_down_action
v.add_subview(b_down)

b_copy = ui.Button()
b_copy.frame = (10,250,100,32)
b_copy.title = 'copy'
b_copy.background_color = 'white'
b_copy.border_width = 1
def b_copy_action(sender):
    name = str(ObjCClass('UIApplication').sharedApplication().keyWindow().firstResponder().name())
    tv = sender.superview[name]
    clipboard.set(tv.text)
b_copy.action = b_copy_action
v.add_subview(b_copy)

b_clear = ui.Button()
b_clear.frame = (10,290,100,32)
b_clear.title = 'clear'
b_clear.background_color = 'white'
b_clear.border_width = 1
def b_clear_action(sender):
    name = str(ObjCClass('UIApplication').sharedApplication().keyWindow().firstResponder().name())
    tv = sender.superview[name]
    tv.text = ''
b_clear.action = b_clear_action
v.add_subview(b_clear)

def typeChar(sender):
	'''finds active textinput, and types the button's title'''
	tf=sender.objc_instance.firstResponder()
	tf.insertText_(sender.title)

#create special keys
def prev(sender):
	'''simulates 'tab' key, go to next field '''
	
	s=sender.objc_instance.firstResponder()._previousKeyResponder().becomeFirstResponder()
	buttons.append(ui.Button(image=ui.Image.named('iob:ios7_arrow_back_32'),action=prev))

def next(sender):
	'''simulates 'tab' key, go to next field '''
	s=sender.objc_instance.firstResponder()._nextKeyResponder().becomeFirstResponder()
	buttons.append(ui.Button(image=ui.Image.named('iob:ios7_arrow_forward_32'),action=next))


#create normal keys
d = 32
dd = 4
emojis = '😊😜😱💦☔️😀😃😄😁😆😅😂🤣☺️😊😇🙂🙃😉😌😍🥰😘😗😙😚😋😛😝😜🤪🤨🧐🤓😎🤩🥳😏😒😞😔😟😕🙁☹️😣😖😫😩🥺😢😭😤😠😡🤬🤯😳🥵🥶😱😨😰😥😓🤗🤔🤭🤫🤥😶😐😑😬😦😧😮😲😴🤤😪😵🤐🥴🤢🤮🤧😷🤒🤕🤑🤠😈'
n_emojis_in_set = 20
n_sets = 1 + int((len(emojis)-1)/n_emojis_in_set)

tv.i_set = 0
tv.n_sets = n_sets
def nextSet(sender):
	name = str(ObjCClass('UIApplication').sharedApplication().keyWindow().firstResponder().name())
	tv = v[name]
	tv.i_set = tv.i_set + 1
	if tv.i_set == tv.n_sets:
		tv.i_set = 0
	#attach our accessory to the textfield, and textview
	ww = vv_array[tv.i_set]
	tvo = tv.objc_instance
	#print(dir(tvo))
	tvo.setInputAccessoryView_(ObjCInstance(ww))
	tvo.reloadInputViews()
	
vv_array = []
for i_set in range(0,n_sets):
	l = int(len(emojis)/n_sets)
	i = i_set * l
	set_emojis = emojis[i:i+l]
	w, h = ui.get_screen_size()	
	vv = ui.View(name='set'+str(i_set))
	vv.background_color = 'lightgray'
	h = 0
	x = dd
	y = dd
	for button_title in set_emojis:
		b = ui.Button(title=button_title)
		b_action = typeChar
		b.action=b_action
		b.frame = (x,y,d,d)
		b.font = ('.SFUIText', d)
		if (y+d+dd) > h:
			h = y + d + dd
		vv.add_subview(b)
		x = x + d + dd
		if (x+d+dd) > w:
			x = dd
			y = y + d + dd
	device = ObjCClass('UIDevice').currentDevice().model()
	if str(device) == 'iPhone':
		bb_target = ui.Button()
		bb_target.title = 'next emojis'
		wb,hb = ui.measure_string(bb_target.title,font=bb_target.font)
		bb_target.action = nextSet
		bb_target.frame = (dd,h,wb+2,d)
		vv.add_subview(bb_target)
		h = h + d + dd
	vv.frame = (0,0,w,h)
	vv_array.append(vv)
	
#nextSet(vv_array[n_sets-1]['nextSet'])	# display 1st set

device = ObjCClass('UIDevice').currentDevice().model()
if str(device) == 'iPad':
	# add a button at right of "typing suggestions", just above the keyboard
	bb_target = ui.Button()
	bb_target.action = nextSet

	UIBarButtonItem = ObjCClass('UIBarButtonItem').alloc().initWithTitle_style_target_action_('next emojis',0,bb_target,sel('invokeAction:')).autorelease()
	#UIBarButtonItem = ObjCClass('UIBarButtonItem').alloc().initWithImage_style_target_action_(ns(ui.Image.named('emj:Bicycle').with_rendering_mode(ui.RENDERING_MODE_ORIGINAL)),0,bb_target,sel('invokeAction:')).autorelease()

	UIBarButtonItemGroup = ObjCClass('UIBarButtonItemGroup').alloc().initWithBarButtonItems_representativeItem_([UIBarButtonItem],None)

	for tv in v.subviews:
		if 'TextView' in str(type(tv)):
			tv.i_set = 0
			tv.n_sets = n_sets

			tvo = tv.objc_instance
			#tvo.inputAssistantItem().setTrailingBarButtonGroups([UIBarButtonItemGroup])
			tvo.inputAssistantItem().setLeadingBarButtonGroups([UIBarButtonItemGroup])
			#print(dir(tvo))
			#print(dir(tvo.inputAssistantItem()))
			ww = vv_array[tv.i_set]
			tvo.setInputAccessoryView_(ObjCInstance(ww))
			tvo.reloadInputViews()

v.present('sheet')
v['TextView'].selected_range = (0,0)
v['TextView'].begin_editing()
#nextSet(vv_array[n_sets-1]['nextSet'])	# display 1st set