编辑 - 神圣的哎呀，我得到它打印iframe打印预览!!

Question

我正在尝试将标签转换为打印预览图。我成功地转向了这样的打印预览：

       SELECT ParallelPeriod ([Date].[Calendar].[Calendar Semester]
       , 3
       , [Date].[Calendar].[Month].[October 2007])
       ON 0

   FROM [Adventure Works]


results:
April 2006
$882,899.94

如果您将粘贴复制到暂存器，请执行以下操作：

function noida_printpreview(aWindow) {
    var wbp = aWindow.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIWebBrowserPrint);
    var listener = {
        onLocationChange: function(webProgress, request, location, flags) {},
        onProgressChange: function(webProgress, request, curSelfProgress, maxSelfProgress, curTotalProgress, maxTotalProgress) {},
        onSecurityChange: function(webProgress, request, state) {},
        onStateChange: function(webProgress, request, stateFlags, status) {},
        onStatusChange: function(webProgress, request, status, message) {},
        QueryInterface: function(iid) {
            if (iid.equals(Ci.nsIWebProgressListener) || iid.equals(Ci.nsISupportsWeakReference)) {
                return this;
            }
            throw Cr.NS_NOINTERFACE;
        }
    }
    Services.prefs.setBoolPref('print.show_print_progress', false);
    //XXX I would have thought this would work, instead I'm forced to use prefs service
    wbp.globalPrintSettings.showPrintProgress = false;
    wbp.printPreview(wbp.globalPrintSettings, aWindow, listener);
    Services.prefs.clearUserPref('print.show_print_progress');
}

你会看到它转向打印预览，但它没有按钮去打印对话框，甚至关闭。后退按钮不再起作用了。

你能帮助我弄清楚为什么它如此古怪。

由于

Answer 1

如果您只想发起打印预览，则可以执行以下操作：

function noida_printpreview(aWindow) {
    aWindow.document.getElementById("cmd_printPreview").doCommand();
}

可以通过以下方式启动打印：

function noida_print(aWindow) {
    aWindow.document.getElementById("cmd_print").doCommand();
}

这些使用内置的Firefox命令来执行打印或打印预览。使用内置的command interface。它们应该比自己硬编码更具有前瞻性（它们是一种预期的抽象，因此“可以调用它而无需了解其实现的细节。”

我在我的Firefox附加组件Print Button is Print中使用了这两个，它将打印按钮更改为实际上是一个打印按钮，打印预览功能可用 shift -click和/或 ctrl -click。

单击打印按钮时，Print Button is Print插件使用以下功能执行打印或打印预览：

const extensionPrefs  = "extensions." + "PrintButtonIsPrint";

function handlePrintButton(event) {
    var window = event.view;
    let commandId = "cmd_print";

    if(
        (event.ctrlKey
            && (!Services.prefs.prefHasUserValue(extensionPrefs + ".printPreview.ctrl")
                || Services.prefs.getBoolPref(extensionPrefs + ".printPreview.ctrl")))
        || (event.shiftKey
            && (!Services.prefs.prefHasUserValue(extensionPrefs + ".printPreview.shift")
                || Services.prefs.getBoolPref(extensionPrefs + ".printPreview.shift")))
    ) {
        //The user can enable/disable being able to use shift and/or ctrl-click via 
        //  the add-on's option dialog.
        commandId = "cmd_printPreview";
    }
    let printCommand = window.document.getElementById(commandId);
    try {
        printCommand.doCommand();
    } catch (e) {
        //The doCommand() causes an exception on Linux, but doing the exact same thing
        //  as the command does work.  I assume this is because of the scope of the 
        //  window variable.
        //Having this explicitly done here will require this to be changed if the method
        //  of calling the print command changes instead of any such changes automatically
        //  being incorporated by using the "cmd_print".
        //Note: We try a print command here even if it is a preview which failed.
        PrintUtils.print(window.gBrowser.selectedBrowser.contentWindowAsCPOW,
                             window.gBrowser.selectedBrowser);
    }
}

Answer 2

<击> 发布这项工作正在进行以显示@Mayken以便他可以提供帮助，这可以复制粘贴到暂存器。

这使用了这种技术：

let b = window.gBrowser, pT = b.selectedTab; b.getBrowserForTab((b.selectedTab = b.addTab(canvas.toDataURL("image/png")))).addEventListener("load", function() { this.removeEventListener("load", arguments.callee, true); let l = window.PrintPreviewListener, e = l.onExit; l.onExit = function() { e.call(l); b.removeCurrentTab(); b.selectedTab = pT; l.onExit = e; }; window.PrintUtils.printPreview(l); }, true );

看到它在打印预览侦听器对象中传递，我们可以暂时覆盖它，然后在退出时恢复。查看dxr上的源代码：

https://dxr.mozilla.org/mozilla-central/source/browser/base/content/browser.js#3217

它表明我们已将getSourceBrowser评论为：

https://dxr.mozilla.org/mozilla-central/source/toolkit/components/printing/content/printUtils.js#159

返回包含正在打印的文档的内容。这必须将其type属性设置为＆＃34; content＆＃34;，＆＃34; content-targetable＆＃34;或＆＃34; content-primary＆＃34;

var win = Services.wm.getMostRecentWindow('navigator:browser'); //Services.appShell.hiddenDOMWindow; var doc = win.document; var iframe = doc.createElementNS('http://www.w3.org/1999/xhtml', 'iframe'); win.nsif = iframe; iframe.addEventListener('load', function() { iframe.removeEventListener('load', arguments.callee, true); var aPPListener = win.PrintPreviewListener; var aOrigPPgetSourceBrowser = aPPListener.getSourceBrowser; aPPListener.getSourceBrowser = function() { var asettime = win.setTimeout(function() { aPPListener.getSourceBrowser = aOrigPPgetSourceBrowser; win.alert('ok restored getSourceBrowser'); }, 5000); return iframe.contentWindow.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIWebNavigation); }; win.PrintUtils.printPreview(aPPListener); }, true); // if i use false here it doesnt work iframe.setAttribute('src', 'data:text,html,this is test text'); // iframe.setAttribute('style', 'display:none'); doc.documentElement.appendChild(iframe); // src page wont load until i append to document

问题是，它没有进入打印预览。这应该有效，因为我将getSourceBrowser设置为iframe的var win = Services.wm.getMostRecentWindow('navigator:browser'); //Services.appShell.hiddenDOMWindow; var doc = win.document; var iframe = doc.createElement('browser'); win.nsif = iframe; iframe.addEventListener('load', function() { iframe.removeEventListener('load', arguments.callee, true); var aPPListener = win.PrintPreviewListener; var aOrigPPgetSourceBrowser = aPPListener.getSourceBrowser; aPPListener.getSourceBrowser = function() { var asettime = win.setTimeout(function() { aPPListener.getSourceBrowser = aOrigPPgetSourceBrowser; win.alert('ok restored getSourceBrowser'); }, 5000); return iframe; }; win.PrintUtils.printPreview(aPPListener); }, true); // if i use false here it doesnt work iframe.setAttribute('type', 'content'); iframe.setAttribute('src', 'data:text,html,this is test text'); doc.documentElement.appendChild(iframe); // src page wont load until i append to document。我得到的错误是：

~~<击>~~
[例外...＆＃34;组件返回失败代码：0x80070057（NS_ERROR_ILLEGAL_VALUE）[nsIWebBrowserPrint.printPreview]＆＃34; nsresult：＆＃34; 0x80070057（NS_ERROR_ILLEGAL_VALUE）＆＃34; location：＆＃34; JS frame :: chrome：//global/content/browser-content.js :: enterPrintPreview :: line 469＆＃34; data：no] browser-content.js：473：0 TypeError：设置一个只有getter browser-content.js的属性：585：9

编辑 - 神圣的哎呀，我得到它打印iframe打印预览!!

将粘贴解决方案复制到暂存器！

addGlobalMonitorForEventsMatchingMask

将标签转换为打印预览，但没有gui

2 个答案:

编辑 - 神圣的哎呀，我得到它打印iframe打印预览!!