Gtk3 TextBuffer.serialize()返回带有格式标签的文本,即使视觉上没有
RPi*_*ess 10 python gtk formatting gtk3
我正在我的项目中使用Gtk TextView/TextBuffer,用户可以通过选择正确的切换按钮来输入富文本(粗体/斜体/下划线).
问题是,如果我将下划线或斜体Pango标志应用于TextView中的文本,然后关闭斜体/下划线并输入更多,然后通过TextBuffer.serialize()未格式化的文本(在TextView中明显未格式化)获取带有这些标记的文本返回时带有下划线/斜体标签.
你可以在这里看到:(注意,为了便于阅读,我使用BeautifulSoup将标签简化为HTML副本,但实际的位置/类型根本没有被编辑过.)
这是代码(需要安装Python3的Gtk3和BS4):
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, Gdk, Pango
import smtplib, mimetypes
from bs4 import BeautifulSoup
class Handler():
def __init__(self):
global html
self.state = 0
def onDeleteWindow(self, *args):
Gtk.main_quit(*args)
def onSendClicked(self, button):
start, end = textBodyBuffer.get_bounds()
self.content = textBodyBuffer.get_text(start, end, True)
# Below is the serialization code for exporting with format tags
format = textBodyBuffer.register_serialize_tagset()
exported = textBodyBuffer.serialize(textBodyBuffer, format, start, end)
exported = exported.decode("latin-1")
exported = exported.split('<text_view_markup>', 1)
del exported[0]
exported[0] = '<text_view_markup>' + str(exported[0])
exported = exported[0].split('</tags>', 1)
del exported[0]
exported = exported[0].split('</text_view_markup>', 1)
exported = str(exported[0]).replace('\n', ' ')
soup = BeautifulSoup(exported)
soupTags = soup.find_all('apply_tag')
for tag in soupTags:
if tag['name'] == 'bold':
tag.name = 'b'
del tag['name']
elif tag['name'] == 'italic':
tag.name = 'em'
del tag['name']
elif tag['name'] == 'underline':
tag.name = 'u'
del tag['name']
print (soup)
def bold(self, button):
global tags_on
name = button.get_name()
if button.get_active(): # Button is "down"/enabled
tags_on.append('bold')
elif button.get_active() != True: # Button is "up"/disabled
del tags_on[tags_on.index('bold')]
def italic(self, button):
global tags_on
name = button.get_name()
if button.get_active(): # Button is "down"/enabled
tags_on.append('italic')
elif button.get_active() != True: # Button is "up"/disabled
del tags_on[tags_on.index('italic')]
def underline(self, button):
global tags_on
name = button.get_name()
if button.get_active(): # Button is "down"/enabled
tags_on.append('underline')
elif button.get_active() != True: # Button is "up"/disabled
del tags_on[tags_on.index('underline')]
def alignToggled(self, radiobutton):
pass
def undo(self, button):
pass
def redo(self, button):
pass
def keyHandler(self, widget, event):
global html
if Gdk.ModifierType.CONTROL_MASK & event.state:
if Gdk.keyval_name(event.keyval) == 'q': # Quit the program
w.destroy()
Gtk.main_quit()
def get_iter_position(buffer):
return buffer.get_iter_at_mark(buffer.get_insert())
def text_inserted(buffer, iter, char, length):
global tags_on
if len(tags_on) >= 0:
iter.backward_chars(length)
for tag in tags_on:
w.queue_draw()
if tag == 'bold':
buffer.apply_tag(tag_bold, get_iter_position(buffer), iter)
elif tag == 'italic':
buffer.apply_tag(tag_italic, get_iter_position(buffer), iter)
elif tag == 'underline':
buffer.apply_tag(tag_underline, get_iter_position(buffer), iter)
if __name__ == '__main__':
global text, html
# Gtk tag globals
global tag_bold, tag_italic, tag_underline, tags_on
tags_on = []
text = ''
html = '<html><body><p>'
builder = Gtk.Builder()
builder.add_from_file('editor.glade')
builder.connect_signals(Handler())
buttonSend = builder.get_object('buttonSend')
textBody = builder.get_object('textviewBody')
textBodyBuffer = textBody.get_buffer()
textBodyBuffer.connect_after('insert-text', text_inserted)
tag_bold = textBodyBuffer.create_tag("bold", weight=Pango.Weight.BOLD)
tag_italic = textBodyBuffer.create_tag("italic", style=Pango.Style.ITALIC)
tag_underline = textBodyBuffer.create_tag("underline", underline=Pango.Underline.SINGLE)
w = builder.get_object('window1')
w.show_all()
Gtk.main()
这是editor.glade文件:
<?xml version="1.0" encoding="UTF-8"?>
<!-- Generated with glade 3.16.1 -->
<interface>
<requires lib="gtk+" version="3.10"/>
<object class="GtkImage" id="image1">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="icon_name">mail-send</property>
</object>
<object class="GtkWindow" id="window1">
<property name="can_focus">False</property>
<property name="title" translatable="yes">Keyboard Mail - Edit Message</property>
<property name="modal">True</property>
<property name="type_hint">dialog</property>
<signal name="delete-event" handler="onDeleteWindow" swapped="no"/>
<signal name="key-press-event" handler="keyHandler" swapped="no"/>
<child>
<object class="GtkBox" id="box2">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="orientation">vertical</property>
<child>
<object class="GtkBox" id="box1">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="orientation">vertical</property>
<child>
<object class="GtkButton" id="buttonSend">
<property name="label" translatable="yes">Send</property>
<property name="visible">True</property>
<property name="can_focus">True</property>
<property name="receives_default">True</property>
<property name="image">image1</property>
<property name="relief">none</property>
<property name="image_position">top</property>
<property name="always_show_image">True</property>
<signal name="clicked" handler="onSendClicked" swapped="no"/>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">False</property>
<property name="position">1</property>
</packing>
</child>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">False</property>
<property name="position">1</property>
</packing>
</child>
<child>
<object class="GtkToolbar" id="toolbar1">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="toolbar_style">icons</property>
<property name="show_arrow">False</property>
<child>
<object class="GtkToggleToolButton" id="buttonBold">
<property name="name">bold</property>
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="tooltip_text" translatable="yes">Make the selected text bold</property>
<property name="icon_name">format-text-bold</property>
<signal name="toggled" handler="bold" swapped="no"/>
</object>
<packing>
<property name="expand">False</property>
<property name="homogeneous">True</property>
</packing>
</child>
<child>
<object class="GtkToggleToolButton" id="buttonItalic">
<property name="name">italic</property>
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="icon_name">format-text-italic</property>
<signal name="toggled" handler="italic" swapped="no"/>
</object>
<packing>
<property name="expand">False</property>
<property name="homogeneous">True</property>
</packing>
</child>
<child>
<object class="GtkToggleToolButton" id="buttonUnderline">
<property name="name">underline</property>
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="icon_name">format-text-underline</property>
<signal name="toggled" handler="underline" swapped="no"/>
</object>
<packing>
<property name="expand">False</property>
<property name="homogeneous">True</property>
</packing>
</child>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">3</property>
</packing>
</child>
<child>
<object class="GtkBox" id="box5">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="orientation">vertical</property>
<child>
<object class="GtkTextView" id="textviewBody">
<property name="width_request">500</property>
<property name="height_request">100</property>
<property name="visible">True</property>
<property name="can_focus">True</property>
<property name="hexpand">True</property>
<property name="vexpand">True</property>
<property name="wrap_mode">word</property>
<property name="left_margin">5</property>
<property name="right_margin">5</property>
</object>
<packing>
<property name="expand">True</property>
<property name="fill">True</property>
<property name="position">0</property>
</packing>
</child>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">3</property>
</packing>
</child>
</object>
</child>
</object>
</interface>
有谁知道为什么TextBuffer.serialize()语句(第23行)返回下划线/斜体标签中明显未格式化的字符？
我似乎无法找到任何模式,当它发生时,它似乎随机决定返回带有标签的文本.
编辑:我已经逐步完成了代码pdb(Python调试器),仍然没有看到任何会导致这种情况的东西.
编辑:有趣的模式我已经想到了 - 如果你同时打开斜体和下划线,然后键入一些,然后立即关闭它们,然后键入,serialize()调用返回正确的字符串.
但是,如果您一次应用一个,为每个新标记键入一个位,则返回错误.
我已经能够用C 中的最小示例重现该问题。因此，我强烈怀疑这是 GTK 中的错误。因此，提问者在上游打开了一个错误报告。
作为解决方法，我建议您尝试自己实现序列化。forward_to_tag_toggle应该对此有所帮助。请注意，您不能使用使用 register_serialize_format的明显路径来注册您自己的序列化程序，然后调用序列化，因为虽然GtkTextBufferSerializeFunc应该返回一个字符串，但在 GObject 存储库中，它显然被记录为返回单个整数的函数。（由于另一个错误。）相反，完全从代码中进行序列化，即获取启动迭代器，然后遍历文本缓冲区。
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