打印页面
无论是共享信息还是维护档案，打印网页都是一项常见任务。 Selenium 通过其 PrintOptions、PrintsPage 和 browsingContext 类简化了这一过程，这些类为网页自动打印提供了灵活直观的接口。 这些类使得用户可以配置打印首选项，如页面布局、页边距和缩放比例，以确保输出满足特定要求。
配置
方向
通过 getOrientation() 和 setOrientation() 方法，可以获取/设置页面方向（PORTRAIT 或 LANDSCAPE）。
public void TestOrientation()
{
driver.get("https://www.selenium.dev/");
PrintOptions printOptions = new PrintOptions();
printOptions.setOrientation(PrintOptions.Orientation.LANDSCAPE);
PrintOptions.Orientation current_orientation = printOptions.getOrientation();
} public void TestOrientation()
{
IWebDriver driver = new ChromeDriver();
driver.Navigate().GoToUrl("https://selenium.dev");
PrintOptions printOptions = new PrintOptions();
printOptions.Orientation = PrintOrientation.Landscape;
PrintOrientation currentOrientation = printOptions.Orientation;
}def test_orientation(driver):
driver.get("https://www.selenium.dev/")
print_options = PrintOptions()
print_options.orientation = "landscape" ## landscape or portrait
assert print_options.orientation == "landscape"范围
通过 getPageRanges() 和 setPageRanges() 方法，可以获取设置要打印页面的范围（如 “2-4”）。
public void TestRange()
{
driver.get("https://www.selenium.dev/");
PrintOptions printOptions = new PrintOptions();
printOptions.setPageRanges("1-2");
String[] current_range = printOptions.getPageRanges();
} public void TestRange()
{
IWebDriver driver = new ChromeDriver();
driver.Navigate().GoToUrl("https://selenium.dev");
PrintOptions printOptions = new PrintOptions();
printOptions.AddPageRangeToPrint("1-3"); // add range of pages
printOptions.AddPageToPrint(5); // add individual page
} def test_range(driver):
driver.get("https://www.selenium.dev/")
print_options = PrintOptions()
print_options.page_ranges = ["1, 2, 3"] ## ["1", "2", "3"] or ["1-3"]
assert print_options.page_ranges == ["1, 2, 3"]尺寸
通过 getPaperSize() 和 setPaperSize() 方法，可以获取/设置要打印页面的纸张尺寸（如"A0"、“A6”、“Legal”、“Tabloid” 等）。
public void TestSize()
{
driver.get("https://www.selenium.dev/");
PrintOptions printOptions = new PrintOptions();
printOptions.setScale(.50);
double current_scale = printOptions.getScale();
} public void TestSize()
{
IWebDriver driver = new ChromeDriver();
driver.Navigate().GoToUrl("https://www.selenium.dev/");
PrintOptions printOptions = new PrintOptions();
PrintOptions.PageSize currentDimensions = printOptions.PageDimensions;
}def test_size(driver):
driver.get("https://www.selenium.dev/")
print_options = PrintOptions()
print_options.scale = 0.5 ## 0.1 to 2.0``
assert print_options.scale == 0.5边距
通过 getPageMargin() 和 setPageMargin() 方法，可以获取/设置要打印页面的边距大小（也就是上、下、左右边距）。
{
driver.get("https://www.selenium.dev/");
PrintOptions printOptions = new PrintOptions();
PageMargin margins = new PageMargin(1.0,1.0,1.0,1.0);
printOptions.setPageMargin(margins);
double topMargin = margins.getTop();
double bottomMargin = margins.getBottom();
double leftMargin = margins.getLeft();
double rightMargin = margins.getRight();
} public void TestMargins()
{
IWebDriver driver = new ChromeDriver();
driver.Navigate().GoToUrl("https://www.selenium.dev/");
PrintOptions printOptions = new PrintOptions();
PrintOptions.Margins currentMargins = printOptions.PageMargins;
}def test_margin(driver):
driver.get("https://www.selenium.dev/")
print_options = PrintOptions()
print_options.margin_top = 10
print_options.margin_bottom = 10
print_options.margin_left = 10
print_options.margin_right = 10
assert print_options.margin_top == 10
assert print_options.margin_bottom == 10
assert print_options.margin_left == 10
assert print_options.margin_right == 10缩放
通过 getScale() 和 setScale() 方法，可以获取/设置要打印页面的缩放尺寸（如 1.0 为 100% 或默认缩放，0.25 为 25% 等）。
public void TestScale()
{
driver.get("https://www.selenium.dev/");
PrintOptions printOptions = new PrintOptions();
printOptions.setScale(.50);
double current_scale = printOptions.getScale();
} public void TestScale()
{
IWebDriver driver = new ChromeDriver();
driver.Navigate().GoToUrl("https://www.selenium.dev/");
PrintOptions printOptions = new PrintOptions();
printOptions.ScaleFactor = 0.5;
double currentScale = printOptions.ScaleFactor;
}def test_scale(driver):
driver.get("https://www.selenium.dev/")
print_options = PrintOptions()
print_options.scale = 0.5 ## 0.1 to 2.0
current_scale = print_options.scale
assert current_scale == 0.5背景
通过 getBackground() 和 setBackground() 方法，可以获取/设置背景色和图片出现，其为布尔值 true 或 false。
public void TestBackground()
{
driver.get("https://www.selenium.dev/");
PrintOptions printOptions = new PrintOptions();
printOptions.setBackground(true);
boolean current_background = printOptions.getBackground();
} public void TestBackgrounds()
{
IWebDriver driver = new ChromeDriver();
driver.Navigate().GoToUrl("https://www.selenium.dev/");
PrintOptions printOptions = new PrintOptions();
printOptions.OutputBackgroundImages = true;
bool currentBackgrounds = printOptions.OutputBackgroundImages;
}def test_background(driver):
driver.get("https://www.selenium.dev/")
print_options = PrintOptions()
print_options.background = True ## True or False
assert print_options.background is True缩放至合适大小
通过 getShrinkToFit() 和 setShrinkToFit() 方法，可以获取/设置页面是否会根据页面内容缩小，其为布尔值 true 或 false。
public void TestShrinkToFit()
{
driver.get("https://www.selenium.dev/");
PrintOptions printOptions = new PrintOptions();
printOptions.setShrinkToFit(true);
boolean current_shrink_to_fit = printOptions.getShrinkToFit();
} public void TestShrinkToFit()
{
IWebDriver driver = new ChromeDriver();
driver.Navigate().GoToUrl("https://www.selenium.dev/");
PrintOptions printOptions = new PrintOptions();
printOptions.ShrinkToFit = true;
bool currentShrinkToFit = printOptions.ShrinkToFit;
}def test_shrink_to_fit(driver):
driver.get("https://www.selenium.dev/")
print_options = PrintOptions()
print_options.shrink_to_fit = True ## True or False
assert print_options.shrink_to_fit is True打印
配置好打印选项后，就可以打印页面了。为此，您可以调用打印功能，生成网页的 PDF 表示形式。
生成的 PDF 文件可以保存到本地存储器中，以便进一步使用或分发。
使用 PrintsPage() 时，打印命令将以 base64 编码格式返回 PDF
数据，该格式可以解码并写入所需位置的文件，而使用 BrowsingContext() 时将返回字符串。
目前可能有多种实现方式，这取决于您所选择的语言。例如，Java 可以使用 BrowingContext()
或 PrintsPage() 进行打印。两者都将 PrintOptions() 对象作为一个参数。
注意：BrowsingContext() 是 Selenium BiDi 实现的一部分。为启用 BiDi，请参见启用 Bidi
PrintsPage()
public void PrintWithPrintsPageTest()
{
driver.get("https://www.selenium.dev/");
PrintsPage printer = (PrintsPage) driver;
PrintOptions printOptions = new PrintOptions();
Pdf printedPage = printer.print(printOptions);
Assertions.assertNotNull(printedPage);
}BrowsingContext()
public void PrintWithBrowsingContextTest()
{
BrowsingContext browsingContext = new BrowsingContext(driver, driver.getWindowHandle());
driver.get("https://www.selenium.dev/selenium/web/formPage.html");
PrintOptions printOptions = new PrintOptions();
String printPage = browsingContext.print(printOptions);
Assertions.assertTrue(printPage.length() > 0);
}print_page()
def test_prints_page(driver):
driver.get("https://www.selenium.dev/")
print_options = PrintOptions()
pdf = driver.print_page(print_options)
assert len(pdf) > 0
