From b5aa501bab1675221553780cd071b93eedb387f2 Mon Sep 17 00:00:00 2001
From: Marijn Haverbeke <marijn@haverbeke.nl>
Date: Thu, 7 Mar 2019 17:32:39 +0100
Subject: [PATCH] Use 1e9 instead of 2e9 for big integers

Several engines apparently store only 31 bits in smallints
---
 src/docview.ts         | 2 +-
 src/viewport.ts        | 4 ++--
 test/test-heightmap.ts | 4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/docview.ts b/src/docview.ts
index 0a80e58e..6fb2947f 100644
--- a/src/docview.ts
+++ b/src/docview.ts
@@ -566,7 +566,7 @@ function extendWithRanges(diff: A<ChangedRange>, ranges: number[]): A<ChangedRan
   let result: ChangedRange[] = []
   for (let dI = 0, rI = 0, posA = 0, posB = 0;; dI++) {
     let next = dI == diff.length ? null : diff[dI], off = posA - posB
-    let end = next ? next.fromB : 2e9
+    let end = next ? next.fromB : 1e9
     while (rI < ranges.length && ranges[rI] < end) {
       let from = ranges[rI], to = ranges[rI + 1]
       let fromB = Math.max(posB, from), toB = Math.min(end, to)
diff --git a/src/viewport.ts b/src/viewport.ts
index 70c80ea4..60d2d5c2 100644
--- a/src/viewport.ts
+++ b/src/viewport.ts
@@ -40,8 +40,8 @@ export class ViewportState {
   }
 
   coverEverything() {
-    this.top = -2e9
-    this.bottom = 2e9
+    this.top = -1e9
+    this.bottom = 1e9
   }
 
   getViewport(doc: Text, heightMap: HeightMap, bias: number, scrollTo: number): Viewport {
diff --git a/test/test-heightmap.ts b/test/test-heightmap.ts
index b1e01161..ce53dd10 100644
--- a/test/test-heightmap.ts
+++ b/test/test-heightmap.ts
@@ -201,7 +201,7 @@ describe("HeightMap", () => {
       let block2 = map.blockAt(block1.bottom + 1, text, 0, 0)
       ist(block2.from, 4); ist(block2.to, 7)
       ist(block2.top, block1.bottom); ist(block2.bottom, block1.bottom, ">")
-      let block3 = map.blockAt(2e9, text, 0, 0)
+      let block3 = map.blockAt(1e9, text, 0, 0)
       ist(block3.from, 16); ist(block3.to, 19)
       ist(block3.bottom, map.height)
     })
@@ -259,7 +259,7 @@ describe("HeightMap", () => {
       let line3 = map.lineAt(15, byP, text, 0, 0)
       ist(line3.from, 12); ist(line3.to, 15)
       ist(line3.bottom, map.height)
-      ist(map.lineAt(2e9, byH, text, 0, 0), line3, eqBlock)
+      ist(map.lineAt(1e9, byH, text, 0, 0), line3, eqBlock)
     })
 
     it("finds lines in lines", () => {