ubuntu text editors

05 April 2013

A text editor is a type of program used for editing plain text files.

Here focuses on vi and nano editors.

vi

vi is a modal editor: it operates in either insert mode or normal mode.

insert mode: typed text becomes part of the document. normal mode: keystrokes are interpreted as commands that control the edit session.

Start vi

vi filename     # edit filename
vi -r filename  # recover filename that was being edited when system crashed.

vi Subcommands

i   - insert text before cursor, until Esc hit
a   - append text after cursor, until Esc hit

r   - replace single character under cursor(no Esc needed)
R   - replace characters, starting with current cursor position, until Esc hit

d   - delete single character
dd  - delete current line

Ctrl-U 	Scrolls up one-half screen.
Ctrl-D 	Scrolls down one-half screen.
Ctrl-F 	Scrolls forward one screen.
Ctrl-B 	Scrolls backward one screen.

last-line mode

Subcommands with the prefix:(colon),/(slash),?(question mark),!(exclamation point),or !!(two exclamation points) read input on a line displayed at the bottom of the screen.

Pressing the Esc (escape key) switches the editor to normal mode.

:x  - quit vi, writing out modified file.
:wq - quit vi, writing out modified file.
:q  - quit vi
:q! - quit vi even though latest changes have not been saved.

:r filename - read file and insert after current line
:w          - write current contents to file
:w newfile  - write current contents to a new file

References

SciTE

$ sudo apt-get install scite
$ wget http://scite-files.googlecode.com/svn-history/trunk/translations/locale.zh_cn.properties

SciTE User Options File: ~/.SciTEUser.properties

# 修改所有的字体为微软雅黑，如果希望修改为其它字体，只需要修改default.font.name即可    
default.font.name=font:!Microsoft YaHei
font.base=$(default.font.name),size:11
font.small=$(default.font.name),size:10
font.comment=$(default.font.name),size:11
font.code.comment.box=$(font.comment)
font.code.comment.line=$(font.comment)
font.code.comment.doc=$(font.comment)
font.code.comment.nested=$(font.comment)
font.text=$(default.font.name),size:10
font.text.comment=$(default.font.name),size:9
font.embedded.base=$(default.font.name),size:9
font.embedded.comment=$(default.font.name),size:9
font.monospace=$(default.font.name),size:11
font.vbs=$(default.font.name),size:9    

# 修改打开文件窗口的文件过滤器为“全部文件”
if PLAT_WIN
    all.files=All Files (*.*)|*.*|
    top.filters=$(all.files)|All Source
if PLAT_GTK
    all.files=All Files (*)|*|Hidden Files (.*)|.*|
    top.filters=$(all.files)|All Source
if PLAT_MAC
    all.files=All Files (*.*)|*.*|
    top.filters=$(all.files)All Source

# 打开SciTE时默认全屏
position.maximize=0

# 默认显示工具条
toolbar.visible=1

# 让scite工具条使用gnome当前主题提供的图标
toolbar.usestockicons=1

# 默认显示状态栏
statusbar.visible=1

#在窗口标题栏显示当前文件的全路径文件名称
title.full.path=1

# 默认显示行号
line.margin.visible=1
# 行号至少占用的宽度
line.margin.width=2+

# 高亮当前选中的单词
highlight.current.word=1
# 设置高亮单词的颜色
highlight.current.word.colour=#FF0000

# 当前文件被外部程序修改时自动载入
load.on.activate=1
# 自动重新载入前询问
are.you.sure.on.reload=1

# 在已运行的SciTE中打开新文件
check.if.already.open=1

# 保存最近打开的文件列表
save.recent=1

# 打开SciTE时自动打开上次退出时没有关闭的所有文件
save.session=1

# 设置tab size 为 4个空格的大小
tabsize=4
# 设置缩进的大小为4个空格的大小，可以和tabsize不同
indent.size=4
#缩进时使用空格代替tab，如果设置为1则是空格和tab混合。
use.tabs=0

# 打开编辑窗格自动换行
wrap=1
# 按字进行换行（更适合亚洲语言）。如果设置为1则是按单词进行换行。
wrap.style=2
# 打开输出窗格自动换行
output.wrap=1

# 开启单词自动补全
autocompleteword.automatic=1

# 打开文件时自动检测编码
command.discover.properties=python ~/.SciTEFileDetect.py "$(FilePath)"
    
# xml、html自动闭合括号
xml.auto.close.tags=1

Use .SciTEFileDetect.py to detect automatically file encoding.

# Detect file encoding
# Simple method that just chacks that first 1000 lines are valid in each encoding
# and chooses first from set that is valid for all lines checked.
# A better version would allow for a small proportion of failures and rank encodings
# depending on how well they match the input.
import sys
import os

encodings = [
    ['utf-8', 65001, 0],
    ['cp932', 932, 128],
    ['cp936', 936, 134],
    ['cp949', 949, 129],
    ['cp950', 950, 136],
]

codings = [e[0] for e in encodings]

def EncodingWorks(encoding, text):
    try:
        text.decode(encoding)
        return True
    except UnicodeDecodeError:
        return False
    
# Read up to first 1000 lines of file
if len(sys.argv) > 1 and os.path.isfile(sys.argv[1]):
    with open(sys.argv[1], "rb") as f:
        lineNumber = 1
        for line in f.readlines():
            # Filter out any encodings that fail
            codings = [c for c in codings if EncodingWorks(c, line)]
            lineNumber += 1
            if lineNumber > 1000:
                break

comment = ''
for c in codings:
    for e in encodings:
        if e[0] == c:
            codePage, characterSet = e[1:]
            if codePage:
                print('%scode.page=%s' % (comment, codePage))
            if characterSet:
                print('%scharacter.set=%s' % (comment, characterSet))
            # Display other matches as comments so can check results
            comment = '#'

# Change the caret colour so we can see that something happened
print('caret.fore=#4499FF')

ubuntu 4