Merge pull request #157 from toasted-nutbread/touch-input

Add support for touch input

8 files changed, 251 insertions, 3 deletions

diff --git a/ext/bg/js/options.js b/ext/bg/js/options.js
index 373a1a6b..f1e02e18 100644
--- a/ext/bg/js/options.js
+++ b/ext/bg/js/options.js
@@ -190,6 +190,7 @@ function optionsSetDefaults(options) {
             debugInfo: false,
             maxResults: 32,
             showAdvanced: false,
+            popupDisplayMode: 'default',
             popupWidth: 400,
             popupHeight: 250,
             popupOffset: 10,
@@ -201,6 +202,7 @@ function optionsSetDefaults(options) {
 
         scanning: {
             middleMouse: true,
+            touchInputEnabled: true,
             selectText: true,
             alphanumeric: true,
             autoHideResults: false,
diff --git a/ext/bg/js/settings.js b/ext/bg/js/settings.js
index 7bc6a651..4bf7181f 100644
--- a/ext/bg/js/settings.js
+++ b/ext/bg/js/settings.js
@@ -31,11 +31,13 @@ async function formRead() {
     optionsNew.general.debugInfo = $('#show-debug-info').prop('checked');
     optionsNew.general.showAdvanced = $('#show-advanced-options').prop('checked');
     optionsNew.general.maxResults = parseInt($('#max-displayed-results').val(), 10);
+    optionsNew.general.popupDisplayMode = $('#popup-display-mode').val();
     optionsNew.general.popupWidth = parseInt($('#popup-width').val(), 10);
     optionsNew.general.popupHeight = parseInt($('#popup-height').val(), 10);
     optionsNew.general.popupOffset = parseInt($('#popup-offset').val(), 10);
 
     optionsNew.scanning.middleMouse = $('#middle-mouse-button-scan').prop('checked');
+    optionsNew.scanning.touchInputEnabled = $('#touch-input-enabled').prop('checked');
     optionsNew.scanning.selectText = $('#select-matched-text').prop('checked');
     optionsNew.scanning.alphanumeric = $('#search-alphanumeric').prop('checked');
     optionsNew.scanning.autoHideResults = $('#auto-hide-results').prop('checked');
@@ -161,11 +163,13 @@ async function onReady() {
     $('#show-debug-info').prop('checked', options.general.debugInfo);
     $('#show-advanced-options').prop('checked', options.general.showAdvanced);
     $('#max-displayed-results').val(options.general.maxResults);
+    $('#popup-display-mode').val(options.general.popupDisplayMode);
     $('#popup-width').val(options.general.popupWidth);
     $('#popup-height').val(options.general.popupHeight);
     $('#popup-offset').val(options.general.popupOffset);
 
     $('#middle-mouse-button-scan').prop('checked', options.scanning.middleMouse);
+    $('#touch-input-enabled').prop('checked', options.scanning.touchInputEnabled);
     $('#select-matched-text').prop('checked', options.scanning.selectText);
     $('#search-alphanumeric').prop('checked', options.scanning.alphanumeric);
     $('#auto-hide-results').prop('checked', options.scanning.autoHideResults);
diff --git a/ext/bg/settings.html b/ext/bg/settings.html
index c77f550c..7f18a358 100644
--- a/ext/bg/settings.html
+++ b/ext/bg/settings.html
@@ -74,6 +74,14 @@
                     </select>
                 </div>
 
+                <div class="form-group">
+                    <label for="popup-display-mode">Popup display mode</label>
+                    <select class="form-control" id="popup-display-mode">
+                        <option value="default">Default</option>
+                        <option value="full-width">Full width</option>
+                    </select>
+                </div>
+
                 <div class="form-group options-advanced">
                     <label for="audio-playback-volume">Audio playback volume (percent)</label>
                     <input type="number" min="0" max="100" id="audio-playback-volume" class="form-control">
@@ -106,6 +114,10 @@
                 </div>
 
                 <div class="checkbox">
+                    <label><input type="checkbox" id="touch-input-enabled"> Touch input enabled</label>
+                </div>
+
+                <div class="checkbox">
                     <label><input type="checkbox" id="select-matched-text"> Select matched text</label>
                 </div>
 
diff --git a/ext/fg/css/client.css b/ext/fg/css/client.css
index b5b1f6bd..a9b8e025 100644
--- a/ext/fg/css/client.css
+++ b/ext/fg/css/client.css
@@ -27,3 +27,25 @@ iframe#yomichan-float {
     visibility: hidden;
     z-index: 2147483647;
 }
+
+iframe#yomichan-float.yomichan-float-full-width {
+    border-left: none;
+    border-right: none;
+    left: 0 !important;
+    right: 0 !important;
+    width: 100% !important;
+    box-sizing: border-box;
+    resize: none;
+}
+
+iframe#yomichan-float.yomichan-float-full-width:not(.yomichan-float-above) {
+    border-bottom: none;
+    top: auto !important;
+    bottom: 0 !important;
+}
+
+iframe#yomichan-float.yomichan-float-full-width.yomichan-float-above {
+    border-top: none;
+    top: 0 !important;
+    bottom: auto !important;
+}
diff --git a/ext/fg/js/document.js b/ext/fg/js/document.js
index 9366832e..13acb036 100644
--- a/ext/fg/js/document.js
+++ b/ext/fg/js/document.js
@@ -85,14 +85,24 @@ function docRangeFromPoint(point) {
                 range.setEnd(position.offsetNode, position.offset);
                 return range;
             }
+            return null;
         };
     }
 
     const range = document.caretRangeFromPoint(point.x, point.y);
+    if (range === null) {
+        return;
+    }
 
     if(imposter !== null) imposter.style.zIndex = -2147483646;
 
-    const rect = range.getClientRects()[0];
+    const rects = range.getClientRects();
+
+    if (rects.length === 0) {
+        return;
+    }
+
+    const rect = rects[0];
     if (point.y > rect.bottom + 2) {
         return;
     }
diff --git a/ext/fg/js/frontend.js b/ext/fg/js/frontend.js
index 266f9640..a81cbef8 100644
--- a/ext/fg/js/frontend.js
+++ b/ext/fg/js/frontend.js
@@ -26,6 +26,14 @@ class Frontend {
         this.textSourceLast = null;
         this.pendingLookup = false;
         this.options = null;
+
+        this.primaryTouchIdentifier = null;
+        this.contextMenuChecking = false;
+        this.contextMenuPrevent = false;
+        this.contextMenuPreviousRange = null;
+        this.mouseDownPrevent = false;
+        this.clickPrevent = false;
+        this.scrollPrevent = false;
     }
 
     async prepare() {
@@ -39,6 +47,15 @@ class Frontend {
             window.addEventListener('mouseup', this.onMouseUp.bind(this));
             window.addEventListener('resize', this.onResize.bind(this));
 
+            if (this.options.scanning.touchInputEnabled) {
+                window.addEventListener('click', this.onClick.bind(this));
+                window.addEventListener('touchstart', this.onTouchStart.bind(this));
+                window.addEventListener('touchend', this.onTouchEnd.bind(this));
+                window.addEventListener('touchcancel', this.onTouchCancel.bind(this));
+                window.addEventListener('touchmove', this.onTouchMove.bind(this), {passive: false});
+                window.addEventListener('contextmenu', this.onContextMenu.bind(this));
+            }
+
             chrome.runtime.onMessage.addListener(this.onBgMessage.bind(this));
         } catch (e) {
             this.onError(e);
@@ -79,7 +96,7 @@ class Frontend {
 
         const search = async () => {
             try {
-                await this.searchAt({x: e.clientX, y: e.clientY});
+                await this.searchAt({x: e.clientX, y: e.clientY}, 'mouse');
             } catch (e) {
                 this.onError(e);
             }
@@ -93,6 +110,14 @@ class Frontend {
     }
 
     onMouseDown(e) {
+        if (this.mouseDownPrevent) {
+            this.setMouseDownPrevent(false, false);
+            this.setClickPrevent(true);
+            e.preventDefault();
+            e.stopPropagation();
+            return false;
+        }
+
         this.mousePosLast = {x: e.clientX, y: e.clientY};
         this.popupTimerClear();
         this.searchClear();
@@ -133,6 +158,85 @@ class Frontend {
         this.searchClear();
     }
 
+    onClick(e) {
+        if (this.clickPrevent) {
+            this.setClickPrevent(false);
+            e.preventDefault();
+            e.stopPropagation();
+            return false;
+        }
+    }
+
+    onTouchStart(e) {
+        if (this.primaryTouchIdentifier !== null && this.getIndexOfTouch(e.touches, this.primaryTouchIdentifier) >= 0) {
+            return;
+        }
+
+        this.setPrimaryTouch(this.getPrimaryTouch(e.changedTouches));
+    }
+
+    onTouchEnd(e) {
+        if (this.primaryTouchIdentifier === null) {
+            return;
+        }
+
+        if (this.getIndexOfTouch(e.changedTouches, this.primaryTouchIdentifier) < 0) {
+            return;
+        }
+
+        this.setPrimaryTouch(this.getPrimaryTouch(this.excludeTouches(e.touches, e.changedTouches)));
+    }
+
+    onTouchCancel(e) {
+        this.onTouchEnd(e);
+    }
+
+    onTouchMove(e) {
+        if (!this.scrollPrevent || this.primaryTouchIdentifier === null) {
+            return;
+        }
+
+        const touches = e.changedTouches;
+        const index = this.getIndexOfTouch(touches, this.primaryTouchIdentifier);
+        if (index < 0) {
+            return;
+        }
+
+        const touch = touches[index];
+        this.searchFromTouch(touch.clientX, touch.clientY, 'touchMove');
+
+        e.preventDefault(); // Disable scroll
+    }
+
+    onContextMenu(e) {
+        if (this.contextMenuPrevent) {
+            this.setContextMenuPrevent(false, false);
+            e.preventDefault();
+            e.stopPropagation();
+            return false;
+        }
+    }
+
+    onAfterSearch(newRange, type, searched, success) {
+        if (type === 'mouse') {
+            return;
+        }
+
+        if (
+            !this.contextMenuChecking ||
+            (this.contextMenuPreviousRange === null ? newRange === null : this.contextMenuPreviousRange.equals(newRange))) {
+            return;
+        }
+
+        if (type === 'touchStart' && newRange !== null) {
+            this.scrollPrevent = true;
+        }
+
+        this.setContextMenuPrevent(true, false);
+        this.setMouseDownPrevent(true, false);
+        this.contextMenuChecking = false;
+    }
+
     onBgMessage({action, params}, sender, callback) {
         const handlers = {
             optionsSet: options => {
@@ -167,18 +271,22 @@ class Frontend {
         }
     }
 
-    async searchAt(point) {
+    async searchAt(point, type) {
         if (this.pendingLookup || this.popup.containsPoint(point)) {
             return;
         }
 
         const textSource = docRangeFromPoint(point);
         let hideResults = !textSource || !textSource.containsPoint(point);
+        let searched = false;
+        let success = false;
 
         try {
             if (!hideResults && (!this.textSourceLast || !this.textSourceLast.equals(textSource))) {
+                searched = true;
                 this.pendingLookup = true;
                 hideResults = !await this.searchTerms(textSource) && !await this.searchKanji(textSource);
+                success = true;
             }
         } catch (e) {
             if (window.yomichan_orphaned) {
@@ -196,6 +304,7 @@ class Frontend {
             }
 
             this.pendingLookup = false;
+            this.onAfterSearch(this.textSourceLast, type, searched, success);
         }
     }
 
@@ -262,6 +371,87 @@ class Frontend {
 
         this.textSourceLast = null;
     }
+
+    getPrimaryTouch(touchList) {
+        return touchList.length > 0 ? touchList[0] : null;
+    }
+
+    getIndexOfTouch(touchList, identifier) {
+        for (let i in touchList) {
+            let t = touchList[i];
+            if (t.identifier === identifier) {
+                return i;
+            }
+        }
+        return -1;
+    }
+
+    excludeTouches(touchList, excludeTouchList) {
+        const result = [];
+        for (let r of touchList) {
+            if (this.getIndexOfTouch(excludeTouchList, r.identifier) < 0) {
+                result.push(r);
+            }
+        }
+        return result;
+    }
+
+    setPrimaryTouch(touch) {
+        if (touch === null) {
+            this.primaryTouchIdentifier = null;
+            this.contextMenuPreviousRange = null;
+            this.contextMenuChecking = false;
+            this.scrollPrevent = false;
+            this.setContextMenuPrevent(false, true);
+            this.setMouseDownPrevent(false, true);
+            this.setClickPrevent(false);
+        }
+        else {
+            this.primaryTouchIdentifier = touch.identifier;
+            this.contextMenuPreviousRange = this.textSourceLast ? this.textSourceLast.clone() : null;
+            this.contextMenuChecking = true;
+            this.scrollPrevent = false;
+            this.setContextMenuPrevent(false, false);
+            this.setMouseDownPrevent(false, false);
+            this.setClickPrevent(false);
+
+            this.searchFromTouch(touch.clientX, touch.clientY, 'touchStart');
+        }
+    }
+
+    setContextMenuPrevent(value, delay) {
+        if (!delay) {
+            this.contextMenuPrevent = value;
+        }
+    }
+
+    setMouseDownPrevent(value, delay) {
+        if (!delay) {
+            this.mouseDownPrevent = value;
+        }
+    }
+
+    setClickPrevent(value) {
+        this.clickPrevent = value;
+    }
+
+    searchFromTouch(x, y, type) {
+        this.popupTimerClear();
+
+        if (!this.options.general.enable || this.pendingLookup) {
+            return;
+        }
+
+        const search = async () => {
+            try {
+                await this.searchAt({x, y}, type);
+            } catch (e) {
+                this.onError(e);
+            }
+        };
+
+        search();
+    }
 }
 
 window.yomichan_frontend = new Frontend();
diff --git a/ext/fg/js/popup.js b/ext/fg/js/popup.js
index a17b184a..14276efe 100644
--- a/ext/fg/js/popup.js
+++ b/ext/fg/js/popup.js
@@ -62,6 +62,7 @@ class Popup {
             }
         }
 
+        let above = false;
         let y = 0;
         let height = Math.max(containerHeight, options.general.popupHeight);
         const yBelow = elementRect.bottom + options.general.popupOffset;
@@ -75,11 +76,14 @@ class Popup {
             } else {
                 height = Math.max(height - overflowAbove, 0);
                 y = Math.max(yAbove - height, 0);
+                above = true;
             }
         } else {
             y = yBelow;
         }
 
+        this.container.classList.toggle('yomichan-float-full-width', options.general.popupDisplayMode === 'full-width');
+        this.container.classList.toggle('yomichan-float-above', above);
         this.container.style.left = `${x}px`;
         this.container.style.top = `${y}px`;
         this.container.style.width = `${width}px`;
diff --git a/ext/manifest.json b/ext/manifest.json
index 7ee66f4f..ef8b84ec 100644
--- a/ext/manifest.json
+++ b/ext/manifest.json
@@ -27,6 +27,10 @@
     }],
     "minimum_chrome_version": "57.0.0.0",
     "options_page": "bg/settings.html",
+    "options_ui": {
+        "page": "bg/settings.html",
+        "open_in_tab": true
+    },
     "permissions": [
         "<all_urls>",
         "storage",