Add the API to support webview printing (2167c0be) · Commits · e / os / android_frameworks_base

core/java/android/webkit/WebView.java

+29 −0

Original line number	Diff line number	Diff line
		@@ -48,6 +48,7 @@ import android.widget.AbsoluteLayout;

		import java.io.BufferedWriter;
		import java.io.File;
		import java.io.OutputStream;
		import java.util.Map;

		/**
		@@ -1033,6 +1034,34 @@ public class WebView extends AbsoluteLayout
		return mProvider.capturePicture();
		}

		/**
		* Exports the contents of this Webview as PDF. Only supported for API levels
		* {@link android.os.Build.VERSION_CODES#KEY_LIME_PIE} and above.
		*
		* @param out The stream to export the PDF contents to. Cannot be null.
		* @param width The page width. Should be larger than 0.
		* @param height The page height. Should be larger than 0.
		* @param resultCallback A callback to be invoked when the PDF content is exported.
		* A true indicates success, and a false failure.
		*
		* TODO: explain method parameters, margins, consider making the callback
		* return more meaningful information, explain any threading concerns, HW
		* draw limitations, and make it public.
		* TODO: at the moment we are asking app to provide paper size information (width
		* and height). This is likely not ideal (I think need margin info too).
		* Another approach would be using PrintAttributes. This is to be clarified later.
		*
		* TODO: explain this webview will not draw during export (onDraw will clear to
		* background color) so recommend taking it offscreen, or putting in a layer with an
		* overlaid progress UI / spinner.
		* @hide
		*/
		public void exportToPdf(OutputStream out, int width, int height,
		ValueCallback<Boolean> resultCallback) {
		checkThread();
		mProvider.exportToPdf(out, width, height, resultCallback);
		}

		/**
		* Gets the current scale of this WebView.
		*

core/java/android/webkit/WebViewClassic.java

+11 −0

Original line number	Diff line number	Diff line
		@@ -2891,6 +2891,17 @@ public final class WebViewClassic implements WebViewProvider, WebViewProvider.Sc
		return result;
		}

		/**
		* See {@link WebView#exportToPdf()}
		*/
		@Override
		public void exportToPdf(java.io.OutputStream out, int width, int height,
		ValueCallback<Boolean> resultCallback) {
		// K-only API not implemented in WebViewClassic.
		throw new IllegalStateException("This API not supported in Classic WebView.");

		}

		/**
		* See {@link WebView#getScale()}
		*/

core/java/android/webkit/WebViewProvider.java

+4 −0

Original line number	Diff line number	Diff line
		@@ -40,6 +40,7 @@ import android.webkit.WebView.PictureListener;

		import java.io.BufferedWriter;
		import java.io.File;
		import java.io.OutputStream;
		import java.util.Map;

		/**
		@@ -146,6 +147,9 @@ public interface WebViewProvider {

		public Picture capturePicture();

		public void exportToPdf(OutputStream out, int width, int height,
		ValueCallback<Boolean> resultCallback);

		public float getScale();

		public void setInitialScale(int scaleInPercent);