学习笔记-实验楼项目课（Linux桌面字典）

import os
import re
import time
import fcntl
import logging
import pygtk
pygtk.require('2.0')
import gtk
import gobject
import webkit
import requests
import json
 
 
HOME = os.getenv("HOME") + '/.youdao-dict/'
LOG = HOME + '/pyoudao.log'
LOCK = HOME +  '/pyoudao.lock'
QUERY_URL = 'http://fanyi.youdao.com/openapi.do?keyfrom=tinxing&key=1312427901&type=data&doctype=json&version=1.1&q='
 
if not os.path.exists(HOME):
    os.mkdir(HOME)
 
logging.basicConfig(filename=LOG, level=logging.DEBUG)
 
class Dict:
    def __init__(self):
        self.mouse_in = False
        self.popuptime = 0
        self.last_selection = ''
 
        # 初始化窗口
        self.window = gtk.Window(gtk.WINDOW_POPUP)
        self.window.set_title("pyoudao")
        self.window.set_border_width(3)
        self.window.connect("destroy", lambda w: gtk.main_quit())
        self.window.resize(360, 200)
 
        # 初始化垂直容器
        vbox = gtk.VBox(False, 0)
        vbox.show()
 
        # 创建一个事件容器, 并注册selection_recevied事件函数
        eventbox = gtk.EventBox()
        eventbox.connect("selection_received", self._on_selection_received)
        eventbox.connect('enter-notify-event', self._on_mouse_enter)
        eventbox.connect('leave-notify-event', self._on_mouse_leave)
 
        # 注册周期函数_on_timer，每隔500毫秒执行一次
        gobject.timeout_add(500, self._on_timer, eventbox)
        eventbox.show()
 
        # 创建一个webview
        self.view = webkit.WebView()
        def title_changed(widget, frame, title):
            logging.debug('title_changed to %s, will open webbrowser ' % title)
            import webbrowser
            webbrowser.open('http://dict.youdao.com/search?le=eng&q=' + title )
        self.view.connect('title-changed', title_changed)
        self.view.show()
 
        # 打包各种控件
        self.window.add(vbox)
        vbox.pack_start(eventbox)
        eventbox.add(self.view)
 
    def _on_timer(self, widget):
 
        # 开始检查选择事件
        widget.selection_convert("PRIMARY", "STRING")
 
        if self.window.get_property('visible') and not self.mouse_in:
            x, y = self.window.get_position()
            px, py, mods = self.window.get_screen().get_root_window().get_pointer()
            if (px-x)*(px-x) + (py-y)*(py-y) > 400:
                logging.debug('distance big enough, hide window')
                self.window.hide();
            if(time.time() - self.popuptime > 3):
                logging.debug('time long enough, hide window')
                self.window.hide();
 
        return True
 
    # 如果有字符串被选择，则执行该函数
    def _on_selection_received(self, widget, selection_data, data):
        if str(selection_data.type) == "STRING":
            text = selection_data.get_text()
            if not text:
                return False
            text = text.decode('raw-unicode-escape')
            if(len(text) > 20):
                return False
 
            if (not text) or (text == self.last_selection):
                return False
 
            logging.info("======== Selected String : %s" % text)
            self.last_selection = text
 
            m = re.search(r'[a-zA-Z-]+', text.encode('utf8'))
            if not m:
                logging.info("Query nothing")
                return False
 
            word = m.group(0).lower()
            if self.ignore(word):
                logging.info('Ignore Word: ' + word)
                return False
 
            logging.info('QueryWord: ' + word)
            self.query_word(word)
 
        return False
 
    # 查询单词
    def query_word(self, word):
        query_url = QUERY_URL + word
        # 使用requests模块获取json字符串
        js= json.loads(requests.get(query_url).text)
        if 'basic' not in js:
            logging.info('IgnoreWord: ' + word)
            return
 
        x, y, mods = self.window.get_screen().get_root_window().get_pointer()
        self.window.move(x+15, y+10)
 
        self.window.present()
 
        translation = '<br/>'.join(js['translation'])
        if 'phonetic' in js['basic']:
            phonetic = js['basic']['phonetic']
        else:
            phonetic = ''
        explains = '<br/>'.join(js['basic']['explains'])
        web = '<br/>'.join( ['<a href="javascript:void(0);">%s</a>: %s'%(i['key'], ' '.join(i['value'])) for i in js['web'][:3] ] )
        html = '''
<style>
.add_to_wordbook {
    background: url(http://bs.baidu.com/yanglin/add.png) no-repeat;
    vertical-align: middle;
    overflow: hidden;
    display: inline-block;
    vertical-align: top;
    width: 24px;
    padding-top: 26px;
    height: 0;
    margin-left: .5em;
}
</style>
 
        <h2>
        %(translation)s
        <span style="color: #0B6121; font-size: 12px">< %(phonetic)s > </span>
        <a href="javascript:void(0);" id="wordbook" title="点击在浏览器中打开" onclick="document.title='%(word)s'"></a> <br/>
        </h2>
 
        <span style="color: #A0A0A0; font-size: 15px">[ %(word)s ] </span>
        <b>基本翻译:</b>
        <p> %(explains)s </p>
 
        <span style="color: #A0A0A0; font-size: 15px">[ %(word)s ] </span>
        <b>网络释意:</b>
        <p> %(web)s </p>
 
        ''' % locals()
 
        # 通过webview显示html字符串
        self.view.load_html_string(html, '')
        self.view.reload()
        self.popuptime = time.time()
 
    def ignore(self, word):
        if len(word)<=3:
            return True
        return False
 
    def _on_mouse_enter(self, wid, event):
        logging.debug('_on_mouse_enter')
        self.mouse_in = True
 
    def _on_mouse_leave(self, *args):
        logging.debug('_on_mouse_leave')
        self.mouse_in = False
        self.window.hide()
 
def main():
    Dict()
    gtk.main()
 
if __name__ == "__main__":
    f=open(LOCK, 'w')
    try:
        fcntl.flock(f.fileno(), fcntl.LOCK_EX|fcntl.LOCK_NB)
    except:
        print 'a process is already running!!!'
        exit(0)
 
    main()