廢話不說，直接上代碼:
#!/usr/bin/env python
# -*- coding:UTF-8 -*-
# Author:Leslie-x
import sys
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
from PyQt5.QtWebEngineWidgets import *
from PIL import Image
from pathlib import Path
class ScreenShotMerge():
def __init__(self, page, over_flow_size,url):
self.im_list = []
self.page = page
self.over_flow_size = over_flow_size
self.get_path(url)
def get_path(self,url):
self.root_path = Path(__file__).parent.joinpath(r'pictures')
if not self.root_path.exists():
self.root_path.mkdir(parents=True)
self.save_path = self.root_path.joinpath(url.replace("?",'/').replace("%","/").split('/')[-1]+"save.png")
#print(self.save_path)
def add_im(self, path):
if len(self.im_list) == self.page:
im = self.reedit_image(path)
else:
im = Image.open(path)
if(len(self.im_list)<15):#防止 MemoryError
im.save('{}/{}.png'.format(self.root_path, len(self.im_list) + 1))
self.im_list.append(im)
def get_new_size(self):
max_width = 0
total_height = 0
# 計算合成後圖片的寬度（以最寬的爲準）和高度
for img in self.im_list:
width, height = img.size
if width > max_width:
max_width = width
total_height += height
return max_width, total_height
def image_merge(self, ):
if len(self.im_list) > 1:
max_width, total_height = self.get_new_size()
# 產生一張空白圖
new_img = Image.new('RGB', (max_width - 15, total_height), 255)
x = y = 0
for img in self.im_list:
width, height = img.size
new_img.paste(img, (x, y))
y += height
print(self.save_path)
new_img.save(self.save_path)
print('截圖成功:', self.save_path)
else:
obj = self.im_list[0]
width, height = obj.size
left, top, right, bottom = 0, 0, width, height
box = (left, top, right, bottom)
region = obj.crop(box)
new_img = Image.new('RGB', (width, height), 255)
new_img.paste(region, box)
new_img.save(self.save_path)
print('截圖成功:', self.save_path)
def reedit_image(self, path):
obj = Image.open(path)
width, height = obj.size
left, top, right, bottom = 0, height - self.over_flow_size, width, height
box = (left, top, right, bottom)
region = obj.crop(box)
return region
class MainWindow(QMainWindow):
def __init__(self, url,parent=None):
super(MainWindow, self).__init__(parent)
self.count=0#記錄拍照次數
self.setWindowTitle('頁面截圖')
self.temp_height = 0
self.setWindowFlag(Qt.WindowMinMaxButtonsHint, False) # 禁用最大化，最小化
# self.setWindowFlag(Qt.WindowStaysOnTopHint, True) # 窗口頂置
self.setWindowFlag(Qt.FramelessWindowHint, True) # 窗口無邊框
self.url=url
def urlScreenShot(self, url):
self.browser = QWebEngineView()
self.browser.load(QUrl(url))
geometry = self.chose_screen()
self.setGeometry(geometry)
self.browser.loadFinished.connect(self.check_page)
self.setCentralWidget(self.browser)
def get_page_size(self):
size = self.browser.page().contentsSize()
self.set_height = size.height()
self.set_width = size.width()
return size.width(), size.height()
def chose_screen(self):
width, height = 1920, 1080
desktop = QApplication.desktop()
screen_count = desktop.screenCount()
for i in range(0, screen_count):
rect = desktop.availableGeometry(i)
s_width, s_height = rect.width(), rect.height()
if s_width > width and s_height > height:
return QRect(rect.left(), rect.top(), width, height)
return QRect(0, 0, width, height)
def check_page(self):
p_width, p_height = self.get_page_size()
self.page, self.over_flow_size = divmod(p_height, self.height())
if self.page == 0:
self.page = 1
self.ssm = ScreenShotMerge(self.page, self.over_flow_size,self.url)
self.timer = QTimer(self)
self.timer.timeout.connect(self.exe_command)
self.timer.setInterval(400)
self.timer.start()
def exe_command(self):
if self.page > 0 and self.count<15:
self.screen_shot()
self.run_js()
elif self.page < 0 and self.count<15:
self.timer.stop()
self.ssm.image_merge()
self.close()
elif self.over_flow_size > 0 and self.count<15:
self.screen_shot()
self.page -= 1
def run_js(self):
script = """
var scroll = function (dHeight) {
var t = document.documentElement.scrollTop
var h = document.documentElement.scrollHeight
dHeight = dHeight || 0
var current = t + dHeight
if (current > h) {
window.scrollTo(0, document.documentElement.clientHeight)
} else {
window.scrollTo(0, current)
}
}
"""
command = script + '\n scroll({})'.format(self.height())
self.browser.page().runJavaScript(command)
def screen_shot(self):
screen = QApplication.primaryScreen()
winid = self.browser.winId()
pix = screen.grabWindow(int(winid))
name = r'{}/temp.png'.format(self.ssm.root_path)
pix.save(name)
self.ssm.add_im(name)
global app
app = QApplication(sys.argv)
def get_picture(url):
try:
win = MainWindow(url)
win.urlScreenShot(url)
win.show()
app.exit(app.exec_())
except OSError:
print("頁面截取失敗")
可能出現的問題
No module name PIL
執行pip install pillow 安裝即可(注意不是pip install PIL)，如果還有這個提示，嘗試重新啓動idle。
Memory Error
爲了避免出現這類問題，我將圖片拼接的數量限制在15個，若要修改或者對圖片進行進一步的處理，可修改此部分及截圖部分:
def add_im(self, path):
if len(self.im_list) == self.page:
im = self.reedit_image(path)
else:
im = Image.open(path)
if(len(self.im_list)<15):#防止 MemoryError
im.save('{}/{}.png'.format(self.root_path, len(self.im_list) + 1))
self.im_list.append(im)
報錯Release of profile requested but WebEnginePage still not deleted. Expect troubles !
經過我的修改後，在我的函數中不會出現此問題。若修改代碼出現此問題，可以參考:https://stackoverflow.com/questions/57789171/i-get-release-of-profile-requested-but-webenginepage-still-not-deleted-expect（英語）
https://teratail.com/questions/193394 （日語）
截圖過程中出現 can not open file類錯誤
爲了區分各種網頁的圖片，我本想將圖片名保存成url+".png"的形式，奈何在圖片拼接的過程中，出現了這類錯誤，於是我將圖片名保存成網頁最後一個’/‘後面的字符串+’.png’的格式（經過測試’?‘和’%‘有時候也會出錯，於是也將其也統一變成’’）代碼如下所示：
def get_path(self,url):
self.root_path = Path(__file__).parent.joinpath(r'pictures')
if not self.root_path.exists():
self.root_path.mkdir(parents=True)
self.save_path = self.root_path.joinpath(url.replace("?",'/').replace("%","/").split('/')[-1]+"save.png")
#print(self.save_path)
如有更好的建議歡迎提出
截圖一次後退出
爲了實現多次截圖，需要將app定義爲global，不能定義在函數內部(定義在內部只能給一個網頁截圖)：
global app
app = QApplication(sys.argv)
def get_picture(url):
try:
win = MainWindow(url)
win.urlScreenShot(url)
win.show()
app.exit(app.exec_())
except OSError:
print("頁面截取失敗")
報錯類似於[10900:16264:0831/013951.389:ERROR:permission_manager_qt.cpp(82)] NOT IMPLEMENTEDUnsupported permission type: 13
簡單來說：就是某些功能QT開發者並沒有實現
The problem has nothing to do with program execution permissions.
Qt WebEngine is written on the basis of chromium so the Qt developers do not currently implement all the functionalities but will add more functionalities little by little. In this case, the permissions available by chromium are:
enum class PermissionType {
MIDI_SYSEX = 1,
// PUSH_MESSAGING = 2,
NOTIFICATIONS = 3,
GEOLOCATION = 4,
PROTECTED_MEDIA_IDENTIFIER = 5,
MIDI = 6,
DURABLE_STORAGE = 7,
AUDIO_CAPTURE = 8,
VIDEO_CAPTURE = 9,
BACKGROUND_SYNC = 10,
FLASH = 11,
SENSORS = 12,
ACCESSIBILITY_EVENTS = 13,
CLIPBOARD_READ = 14,
CLIPBOARD_WRITE = 15,
PAYMENT_HANDLER = 16,
BACKGROUND_FETCH = 17,
IDLE_DETECTION = 18,
PERIODIC_BACKGROUND_SYNC = 19,
WAKE_LOCK_SCREEN = 20,
WAKE_LOCK_SYSTEM = 21,
// Always keep this at the end.
NUM,
};
詳細可參考：https://stackoverflow.com/questions/57733039/errorpermission-manager-qt-cpp82-unsupported-permission-type-13
這裏講的很清楚