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Add support for saving and opening files (#325)

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* Add support for saving a document

This is similar to the "export" functionality, except that
we store all metadata needed to open the file again.

Currently we store the internal representation of the layer
which is probably pretty fragile.

Example document:

```json
{
    "nodes": {},
    "root": {
        "blend_mode": "Normal",
        "cache": "...",
        "cache_dirty": false,
        "data": {
            "Folder": {
                "layer_ids": [
                    3902938778642561358
                ],
                "layers": [
                    {
                        "blend_mode": "Normal",
                        "cache": "...",
                        "cache_dirty": false,
                        "data": {
                            "Shape": {
                                "path": [
                                    {
                                        "MoveTo": {
                                            "x": 0.0,
                                            "y": 0.0
                                        }
                                    },
                                    {
                                        "LineTo": {
                                            "x": 1.0,
                                            "y": 0.0
                                        }
                                    },
                                    {
                                        "LineTo": {
                                            "x": 1.0,
                                            "y": 1.0
                                        }
                                    },
                                    {
                                        "LineTo": {
                                            "x": 0.0,
                                            "y": 1.0
                                        }
                                    },
                                    "ClosePath"
                                ],
                                "render_index": 1,
                                "solid": true,
                                "style": {
                                    "fill": {
                                        "color": {
                                            "alpha": 1.0,
                                            "blue": 0.0,
                                            "green": 0.0,
                                            "red": 0.0
                                        }
                                    },
                                    "stroke": null
                                }
                            }
                        },
                        "name": null,
                        "opacity": 1.0,
                        "thumbnail_cache": "...",
                        "transform": {
                            "matrix2": [
                                223.0,
                                0.0,
                                -0.0,
                                348.0
                            ],
                            "translation": [
                                -188.0,
                                -334.0
                            ]
                        },
                        "visible": true
                    }
                ],
                "next_assignment_id": 3902938778642561359
            }
        },
        "name": null,
        "opacity": 1.0,
        "thumbnail_cache": "...",
        "transform": {
            "matrix2": [
                1.0,
                0.0,
                0.0,
                1.0
            ],
            "translation": [
                479.0,
                563.0
            ]
        },
        "visible": true
    },
    "version": 0
}
```

* Add support for opening a saved document

User can select a file using the browser's file input selector.
We parse it as JSON and load it into the internal representation.

Concerns:
- The file format is fragile
- Loading data directly into internal data structures usually creates
security vulnerabilities
- Error handling: The user is not informed of errors

* Serialize Document and skip "cache" fields in Layer

Instead of serializing the root layer, we serialize the
Document struct directly. Additionally, we mark the
"cache" fields in layer as "skip" fields so they
don't get serialized.

* Opened files use the filename as the tab title

* Split "new document" and "open document" handling

Open document needs name and content to be provided so having a
different interface is cleaner. Also did some refactoring to reuse code.

* Show error to user when a file fails to open

* Clean up code: better variable naming and structure

* Use document name for saved and exported files

We pass through the document name in the export and save
messages. Additionally, we check if the appropriate file
suffixes (.graphite and .svg) need to be added before
passing it to the frontend.

* Refactor document name generation

* Don't assign a default of 1 to Documents that start with something
  other than DEFAULT_DOCUMENT_NAME
* Improve runtime complexity by using binary instead of linear search

* Update Layer panel upon document selection

* Add File>Open/Ctrl+O; File>Save (As)/Ctrl+(Shift)+S; browse filters extension; split out download()/upload() into files.ts; change unsaved close dialog text

Co-authored-by: Dennis Kobert <dennis@kobert.dev>
Co-authored-by: Keavon Chambers <keavon@keavon.com>
This commit is contained in:
Azeem Bande-Ali
2021-08-14 03:56:52 -04:00
committed by GitHub
parent 88255997e8
commit 91543d530d
18 changed files with 280 additions and 80 deletions
Download Patch File Download Diff File Expand all files Collapse all files

96
editor/src/document/document_message_handler.rs
View File

@@ -7,6 +7,7 @@ use log::warn;
use std::collections::VecDeque;
use super::DocumentMessageHandler;
use crate::consts::DEFAULT_DOCUMENT_NAME;
#[impl_message(Message, Documents)]
#[derive(PartialEq, Clone, Debug)]
@@ -24,6 +25,8 @@ pub enum DocumentsMessage {
CloseAllDocumentsWithConfirmation,
CloseAllDocuments,
NewDocument,
OpenDocument,
OpenDocumentFile(String, String),
GetOpenDocumentsList,
NextDocument,
PrevDocument,
@@ -43,6 +46,45 @@ impl DocumentsMessageHandler {
pub fn active_document_mut(&mut self) -> &mut DocumentMessageHandler {
&mut self.documents[self.active_document_index]
}
fn generate_new_document_name(&self) -> String {
let mut doc_title_numbers = self
.documents
.iter()
.filter_map(|d| {
d.name
.rsplit_once(DEFAULT_DOCUMENT_NAME)
.map(|(prefix, number)| (prefix.is_empty()).then(|| number.trim().parse::<isize>().ok()).flatten().unwrap_or(1))
})
.collect::<Vec<isize>>();
doc_title_numbers.sort_unstable();
doc_title_numbers.iter_mut().enumerate().for_each(|(i, number)| *number = *number - i as isize - 2);
// Uses binary search to find the index of the element where number is bigger than i
let new_doc_title_num = doc_title_numbers.binary_search(&0).map_or_else(|e| e, |v| v) + 1;
let name = match new_doc_title_num {
1 => DEFAULT_DOCUMENT_NAME.to_string(),
_ => format!("{} {}", DEFAULT_DOCUMENT_NAME, new_doc_title_num),
};
name
}
fn load_document(&mut self, new_document: DocumentMessageHandler, responses: &mut VecDeque<Message>) {
self.active_document_index = self.documents.len();
self.documents.push(new_document);
// Send the new list of document tab names
let open_documents = self.documents.iter().map(|doc| doc.name.clone()).collect();
responses.push_back(FrontendMessage::UpdateOpenDocumentsList { open_documents }.into());
responses.push_back(
FrontendMessage::ExpandFolder {
path: Vec::new(),
children: Vec::new(),
}
.into(),
);
responses.push_back(DocumentsMessage::SelectDocument(self.active_document_index).into());
}
}
impl Default for DocumentsMessageHandler {
@@ -71,6 +113,7 @@ impl MessageHandler<DocumentsMessage, &InputPreprocessor> for DocumentsMessageHa
.into(),
);
responses.push_back(RenderDocument.into());
responses.extend(self.active_document_mut().handle_folder_changed(vec![]));
}
CloseActiveDocumentWithConfirmation => {
responses.push_back(
@@ -138,48 +181,21 @@ impl MessageHandler<DocumentsMessage, &InputPreprocessor> for DocumentsMessageHa
}
}
NewDocument => {
let digits = ('0'..='9').collect::<Vec<char>>();
let mut doc_title_numbers = self
.documents
.iter()
.map(|d| {
if d.name.ends_with(digits.as_slice()) {
let (_, number) = d.name.split_at(17);
number.trim().parse::<usize>().unwrap()
} else {
1
}
})
.collect::<Vec<usize>>();
doc_title_numbers.sort_unstable();
let mut new_doc_title_num = 1;
while new_doc_title_num <= self.documents.len() {
if new_doc_title_num != doc_title_numbers[new_doc_title_num - 1] {
break;
}
new_doc_title_num += 1;
}
let name = match new_doc_title_num {
1 => "Untitled Document".to_string(),
_ => format!("Untitled Document {}", new_doc_title_num),
};
self.active_document_index = self.documents.len();
let name = self.generate_new_document_name();
let new_document = DocumentMessageHandler::with_name(name);
self.documents.push(new_document);
// Send the new list of document tab names
let open_documents = self.documents.iter().map(|doc| doc.name.clone()).collect();
responses.push_back(FrontendMessage::UpdateOpenDocumentsList { open_documents }.into());
responses.push_back(
FrontendMessage::ExpandFolder {
path: Vec::new(),
children: Vec::new(),
self.load_document(new_document, responses);
}
OpenDocument => {
responses.push_back(FrontendMessage::OpenDocumentBrowse.into());
}
OpenDocumentFile(name, serialized_contents) => {
let document = DocumentMessageHandler::with_name_and_content(name, serialized_contents);
match document {
Ok(document) => {
self.load_document(document, responses);
}
.into(),
);
responses.push_back(SelectDocument(self.active_document_index).into());
Err(e) => responses.push_back(FrontendMessage::DisplayError { description: e.to_string() }.into()),
}
}
GetOpenDocumentsList => {
// Send the list of document tab names