Multiple page support per #157

qzind · Jun 15, 2019 · 8024139 · 8024139
1 parent ac09a97
commit 8024139
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Showing 2 changed files with 67 additions and 1 deletion.
diff --git a/src/qz/printer/action/PrintImage.java b/src/qz/printer/action/PrintImage.java
@@ -100,6 +100,28 @@ public void parseData(JSONArray printData, PrintOptions options) throws JSONExce
         log.debug("Parsed {} images for printing", images.size());
     }
 
+    private List<BufferedImage> breakupOverPages(BufferedImage img, PageFormat page) {
+        List<BufferedImage> splits = new ArrayList<>();
+
+        Rectangle printBounds = new Rectangle(0, 0, (int)page.getImageableWidth(), (int)page.getImageableHeight());
+
+        int columnsNeed = (int)Math.ceil(img.getWidth() / page.getImageableWidth());
+        int rowsNeed = (int)Math.ceil(img.getHeight() / page.getImageableHeight());
+        log.trace("Image to be printed across {} pages", columnsNeed * rowsNeed);
+
+        for(int row = 0; row < rowsNeed; row++) {
+            for(int col = 0; col < columnsNeed; col++) {
+                Rectangle clip = new Rectangle((col * printBounds.width), (row * printBounds.height), printBounds.width, printBounds.height);
+                if (clip.x + clip.width > img.getWidth()) { clip.width = img.getWidth() - clip.x; }
+                if (clip.y + clip.height > img.getHeight()) { clip.height = img.getHeight() - clip.y; }
+
+                splits.add(img.getSubimage(clip.x, clip.y, clip.width, clip.height));
+            }
+        }
+
+        return splits;
+    }
+
     @Override
     public void print(PrintOutput output, PrintOptions options) throws PrinterException {
         if (images.isEmpty()) {
@@ -126,6 +148,15 @@ public void print(PrintOutput output, PrintOptions options) throws PrinterExcept
             manualReverse = true;
         }
 
+        if (!scaleImage) {
+            //breakup large images to print across pages as needed
+            List<BufferedImage> split = new ArrayList<>();
+            for(BufferedImage bi : images) {
+                split.addAll(breakupOverPages(bi, page));
+            }
+            images = split;
+        }
+
         job.setJobName(pxlOpts.getJobName(Constants.IMAGE_PRINT));
         job.setPrintable(this, job.validatePage(page));
 

diff --git a/src/qz/printer/action/WebApp.java b/src/qz/printer/action/WebApp.java
@@ -13,7 +13,10 @@
 import javafx.scene.Scene;
 import javafx.scene.SnapshotParameters;
 import javafx.scene.image.WritableImage;
+import javafx.scene.shape.Rectangle;
 import javafx.scene.transform.Scale;
+import javafx.scene.transform.Transform;
+import javafx.scene.transform.Translate;
 import javafx.scene.web.WebView;
 import javafx.stage.Stage;
 import javafx.util.Duration;
@@ -89,6 +92,7 @@ public class WebApp extends Application {
             webView.getTransforms().add(new Scale(scale, scale));
 
             double increase = 96d / 72d;
+            log.trace("Setting HTML page width to {}", webView.getWidth() * increase);
             webView.setMinWidth(webView.getWidth() * increase);
             webView.setPrefWidth(webView.getWidth() * increase);
             webView.setMaxWidth(webView.getWidth() * increase);
@@ -163,7 +167,38 @@ public static synchronized void print(final PrinterJob job, final WebAppModel mo
                     webView.getTransforms().add(new Scale(scale, scale));
                 }
 
-                Platform.runLater(() -> complete.set(job.printPage(webView)));
+                Platform.runLater(() -> {
+                    double useScale = 1;
+                    for(Transform t : webView.getTransforms()) {
+                        if (t instanceof Scale) { useScale *= ((Scale)t).getX(); }
+                    }
+
+                    PageLayout page = job.getJobSettings().getPageLayout();
+                    Rectangle printBounds = new Rectangle(0, 0, page.getPrintableWidth(), page.getPrintableHeight());
+                    log.debug("Paper area: {},{}:{},{}", (int)page.getLeftMargin(), (int)page.getTopMargin(),
+                              (int)page.getPrintableWidth(), (int)page.getPrintableHeight());
+
+                    Translate activePage = new Translate();
+                    webView.getTransforms().add(activePage);
+
+                    int columnsNeed = (int)Math.ceil(webView.getWidth() / printBounds.getWidth() * useScale);
+                    int rowsNeed = (int)Math.ceil(webView.getHeight() / printBounds.getHeight() * useScale);
+                    log.debug("Document will be printed across {} pages", columnsNeed * rowsNeed);
+
+                    for(int row = 0; row < rowsNeed; row++) {
+                        for(int col = 0; col < columnsNeed; col++) {
+                            activePage.setX((-col * printBounds.getWidth()) / useScale);
+                            activePage.setY((-row * printBounds.getHeight()) / useScale);
+
+                            job.printPage(webView);
+                        }
+                    }
+
+                    //reset state
+                    webView.getTransforms().remove(activePage);
+
+                    complete.set(true);
+                });
             }
             catch(Exception e) { thrown.set(e); }
         });