PrintingPlugin.m
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/*
* Copyright (C) 2017, David PHAM-VAN <dev.nfet.net@gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#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