PrintingPlugin.m
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/*
* Copyright (C) 2018, David PHAM-VAN <dev.nfet.net@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General License for more details.
*
* You should have received a copy of the GNU Lesser General
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#import "PrintingPlugin.h"
@implementation PrintingPlugin
+ (void)registerWithRegistrar:(NSObject<FlutterPluginRegistrar>*)registrar {
FlutterMethodChannel* channel = [FlutterMethodChannel
methodChannelWithName:@"printing"
binaryMessenger:[registrar messenger]];
PrintingPlugin* instance = [[PrintingPlugin alloc] init];
[registrar addMethodCallDelegate:instance channel:channel];
}
- (void)handleMethodCall:(FlutterMethodCall*)call result:(FlutterResult)result {
if ([@"printPdf" isEqualToString:call.method]) {
[self printPdf:[call.arguments objectForKey:@"doc"]];
result(@1);
} else if ([@"sharePdf" isEqualToString:call.method]) {
[self
sharePdf:[call.arguments objectForKey:@"doc"]
withSourceRect:CGRectMake(
[[call.arguments objectForKey:@"x"] floatValue],
[[call.arguments objectForKey:@"y"] floatValue],
[[call.arguments objectForKey:@"w"] floatValue],
[[call.arguments objectForKey:@"h"] floatValue])];
result(@1);
} else {
result(FlutterMethodNotImplemented);
}
}
- (void)printPdf:(nonnull FlutterStandardTypedData *)data {
BOOL printing = [UIPrintInteractionController isPrintingAvailable];
if (!printing) {
NSLog(@"printing not available");
return;
}
BOOL dataOK = [UIPrintInteractionController canPrintData:[data data]];
if (!dataOK) NSLog(@"data not ok to be printed");
UIPrintInteractionController *controller = [UIPrintInteractionController sharedPrintController];
[controller setDelegate:self];
[controller setPrintingItem:[data data]];
UIPrintInteractionCompletionHandler completionHandler = ^(UIPrintInteractionController *printController, BOOL completed, NSError *error) {
if(!completed && error){
NSLog(@"FAILED! due to error in domain %@ with error code %u", error.domain, (unsigned int)error.code);
}
};
[controller presentAnimated:YES completionHandler:completionHandler];
}
- (void)sharePdf:(nonnull FlutterStandardTypedData *)data withSourceRect:(CGRect)rect {
NSURL *tmpDirURL = [NSURL fileURLWithPath:NSTemporaryDirectory() isDirectory:YES];
CFUUIDRef uuid = CFUUIDCreate(NULL);
assert(uuid != NULL);
CFStringRef uuidStr = CFUUIDCreateString(NULL, uuid);
assert(uuidStr != NULL);
NSURL *fileURL = [[tmpDirURL URLByAppendingPathComponent:[NSString stringWithFormat:@"pdf-%@", uuidStr]] URLByAppendingPathExtension:@"pdf"];
assert(fileURL != NULL);
CFRelease(uuidStr);
CFRelease(uuid);
NSString *path = [fileURL path];
NSError *error;
if (![[data data] writeToFile:path options:NSDataWritingAtomic error:&error]) {
NSLog(@"sharePdf error: %@", [error localizedDescription]);
return;
}
UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:@[fileURL] applicationActivities:nil];
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
UIViewController *controller = [UIApplication sharedApplication].keyWindow.rootViewController;
activityViewController.popoverPresentationController.sourceView = controller.view;
activityViewController.popoverPresentationController.sourceRect = rect;
}
[[UIApplication sharedApplication].keyWindow.rootViewController presentViewController:activityViewController animated:YES completion:nil];
}
@end