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// Copyright 2019 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import * as d3 from "d3";
import * as C from "../src/constants";
class Snapper {
resizer: Resizer;
sourceExpand: HTMLElement;
sourceCollapse: HTMLElement;
disassemblyExpand: HTMLElement;
disassemblyCollapse: HTMLElement;
constructor(resizer: Resizer) {
this.resizer = resizer;
this.sourceExpand = document.getElementById(C.SOURCE_EXPAND_ID);
this.sourceCollapse = document.getElementById(C.SOURCE_COLLAPSE_ID);
this.disassemblyExpand = document.getElementById(C.DISASSEMBLY_EXPAND_ID);
this.disassemblyCollapse = document.getElementById(C.DISASSEMBLY_COLLAPSE_ID);
document.getElementById("source-collapse").addEventListener("click", () => {
this.setSourceExpanded(!this.sourceExpand.classList.contains("invisible"));
this.resizer.updatePanes();
});
document.getElementById("disassembly-collapse").addEventListener("click", () => {
this.setDisassemblyExpanded(!this.disassemblyExpand.classList.contains("invisible"));
this.resizer.updatePanes();
});
}
restoreExpandedState(): void {
this.setSourceExpanded(this.getLastExpandedState("source", true));
this.setDisassemblyExpanded(this.getLastExpandedState("disassembly", false));
}
getLastExpandedState(type: string, defaultState: boolean): boolean {
const state = window.sessionStorage.getItem("expandedState-" + type);
if (state === null) return defaultState;
return state === 'true';
}
sourceExpandUpdate(newState: boolean): void {
window.sessionStorage.setItem("expandedState-source", `${newState}`);
this.sourceExpand.classList.toggle("invisible", newState);
this.sourceCollapse.classList.toggle("invisible", !newState);
}
setSourceExpanded(newState: boolean): void {
if (this.sourceExpand.classList.contains("invisible") === newState) return;
const resizer = this.resizer;
this.sourceExpandUpdate(newState);
if (newState) {
resizer.sepLeft = resizer.sepLeftSnap;
resizer.sepLeftSnap = 0;
} else {
resizer.sepLeftSnap = resizer.sepLeft;
resizer.sepLeft = 0;
}
}
disassemblyExpandUpdate(newState: boolean): void {
window.sessionStorage.setItem("expandedState-disassembly", `${newState}`);
this.disassemblyExpand.classList.toggle("invisible", newState);
this.disassemblyCollapse.classList.toggle("invisible", !newState);
}
setDisassemblyExpanded(newState: boolean): void {
if (this.disassemblyExpand.classList.contains("invisible") === newState) return;
const resizer = this.resizer;
this.disassemblyExpandUpdate(newState);
if (newState) {
resizer.sepRight = resizer.sepRightSnap;
resizer.sepRightSnap = resizer.clientWidth;
} else {
resizer.sepRightSnap = resizer.sepRight;
resizer.sepRight = resizer.clientWidth;
}
}
panesUpdated(): void {
this.sourceExpandUpdate(this.resizer.sepLeft > this.resizer.deadWidth);
this.disassemblyExpandUpdate(this.resizer.sepRight <
(this.resizer.clientWidth - this.resizer.deadWidth));
}
}
export class Resizer {
snapper: Snapper;
deadWidth: number;
clientWidth: number;
left: HTMLElement;
right: HTMLElement;
middle: HTMLElement;
sepLeft: number;
sepRight: number;
sepLeftSnap: number;
sepRightSnap: number;
sepWidthOffset: number;
panesUpdatedCallback: () => void;
resizerRight: d3.Selection<HTMLDivElement, any, any, any>;
resizerLeft: d3.Selection<HTMLDivElement, any, any, any>;
constructor(panesUpdatedCallback: () => void, deadWidth: number) {
const resizer = this;
resizer.panesUpdatedCallback = panesUpdatedCallback;
resizer.deadWidth = deadWidth;
resizer.left = document.getElementById(C.SOURCE_PANE_ID);
resizer.middle = document.getElementById(C.INTERMEDIATE_PANE_ID);
resizer.right = document.getElementById(C.GENERATED_PANE_ID);
resizer.resizerLeft = d3.select('#resizer-left');
resizer.resizerRight = d3.select('#resizer-right');
resizer.sepLeftSnap = 0;
resizer.sepRightSnap = 0;
// Offset to prevent resizers from sliding slightly over one another.
resizer.sepWidthOffset = 7;
this.updateWidths();
const dragResizeLeft = d3.drag()
.on('drag', function () {
const x = d3.mouse(this.parentElement)[0];
resizer.sepLeft = Math.min(Math.max(0, x), resizer.sepRight - resizer.sepWidthOffset);
resizer.updatePanes();
})
.on('start', function () {
resizer.resizerLeft.classed("dragged", true);
const x = d3.mouse(this.parentElement)[0];
if (x > deadWidth) {
resizer.sepLeftSnap = resizer.sepLeft;
}
})
.on('end', function () {
if (!resizer.isRightSnapped()) {
window.sessionStorage.setItem("source-pane-width", `${resizer.sepLeft / resizer.clientWidth}`);
}
resizer.resizerLeft.classed("dragged", false);
});
resizer.resizerLeft.call(dragResizeLeft);
const dragResizeRight = d3.drag()
.on('drag', function () {
const x = d3.mouse(this.parentElement)[0];
resizer.sepRight = Math.max(resizer.sepLeft + resizer.sepWidthOffset, Math.min(x, resizer.clientWidth));
resizer.updatePanes();
})
.on('start', function () {
resizer.resizerRight.classed("dragged", true);
const x = d3.mouse(this.parentElement)[0];
if (x < (resizer.clientWidth - deadWidth)) {
resizer.sepRightSnap = resizer.sepRight;
}
})
.on('end', function () {
if (!resizer.isRightSnapped()) {
console.log(`disassembly-pane-width ${resizer.sepRight}`);
window.sessionStorage.setItem("disassembly-pane-width", `${resizer.sepRight / resizer.clientWidth}`);
}
resizer.resizerRight.classed("dragged", false);
});
resizer.resizerRight.call(dragResizeRight);
window.onresize = function () {
resizer.updateWidths();
resizer.updatePanes();
};
resizer.snapper = new Snapper(resizer);
resizer.snapper.restoreExpandedState();
}
isLeftSnapped() {
return this.sepLeft === 0;
}
isRightSnapped() {
return this.sepRight >= this.clientWidth - 1;
}
updatePanes() {
const leftSnapped = this.isLeftSnapped();
const rightSnapped = this.isRightSnapped();
this.resizerLeft.classed("snapped", leftSnapped);
this.resizerRight.classed("snapped", rightSnapped);
this.left.style.width = this.sepLeft + 'px';
this.middle.style.width = (this.sepRight - this.sepLeft) + 'px';
this.right.style.width = (this.clientWidth - this.sepRight) + 'px';
this.resizerLeft.style('left', this.sepLeft + 'px');
this.resizerRight.style('right', (this.clientWidth - this.sepRight - 1) + 'px');
this.snapper.panesUpdated();
this.panesUpdatedCallback();
}
updateWidths() {
this.clientWidth = document.body.getBoundingClientRect().width;
const sepLeft = window.sessionStorage.getItem("source-pane-width");
this.sepLeft = this.clientWidth * (sepLeft ? Number.parseFloat(sepLeft) : (1 / 3));
const sepRight = window.sessionStorage.getItem("disassembly-pane-width");
this.sepRight = this.clientWidth * (sepRight ? Number.parseFloat(sepRight) : (2 / 3));
}
}