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render.js
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render.js
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/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
/* global AlternativesCharMenuView */
'use strict';
/** @fileoverview Render is in charge of draw and composite HTML elements
* under requestion of the IMEController. IMERender is able to read from the
* layout to improve its performance but is not allowed to communicate with
* the controller nor manager.
*/
// XXX: The only thing worth to be remebered is the KEY element must be the
// deepest interactive HTML element on the hierarchy or, if none, simply the
// deepest element. This element must be mapped in LayoutRenderingManager's
// _domObjectMap in order to retrieve the key object defined and normalized in
// layouts and to access its attributes.
var IMERender = (function() {
var ime, activeIme;
var alternativesCharMenu = null;
var _menuKey = null;
var renderingManager = null;
var currentDrawnKeyboardClass = null;
// a WeakMap to map target key object onto the DOM element it's associated
// with; essentially the revrse mapping of |renderingManager._domObjectMap|.
// ideally this should only be accessed by this renderer and alt_char_menu's
// view.
var targetObjDomMap = null;
var layoutWidth = 10;
var numberOfCandidatesPerRow = 8;
var candidateUnitWidth;
var inputMethodName; // used as a CSS class on the candidatePanel
var cachedWindowHeight = -1;
var cachedWindowWidth = -1;
var ARIA_LABELS = {
'⇪': 'upperCaseKey2',
'⌫': 'backSpaceKey2',
' ': 'spaceKey2',
'↵': 'returnKey2',
'.': 'periodKey2',
',': 'commaKey2',
':': 'colonKey2',
';': 'semicolonKey2',
'?': 'questionMarkKey2',
'!': 'exclamationPointKey2',
'(': 'leftBracketKey2',
')': 'rightBracketKey2',
'"': 'doubleQuoteKey2',
'«': 'leftDoubleAngleQuoteKey2',
'»': 'rightDoubleAngleQuoteKey2'
};
window.addEventListener('resize', function kr_onresize() {
cachedWindowHeight = window.innerHeight;
cachedWindowWidth = window.innerWidth;
});
// Initialize the render. It needs some business logic to determine:
// 1- The uppercase for a key object
// 2- When a key is a special key
var init = function kr_init(layoutRenderingManager) {
ime = document.getElementById('keyboard');
renderingManager = layoutRenderingManager;
cachedWindowHeight = window.innerHeight;
cachedWindowWidth = window.innerWidth;
targetObjDomMap = new WeakMap();
};
var setInputMethodName = function(name) {
var candidatePanel = activeIme &&
activeIme.querySelector('.keyboard-candidate-panel');
if (candidatePanel) {
if (inputMethodName)
candidatePanel.classList.remove(inputMethodName);
candidatePanel.classList.add(name);
}
var togglebutton = activeIme &&
activeIme.querySelector('.keyboard-candidate-panel-toggle-button');
if (togglebutton) {
if (inputMethodName)
togglebutton.classList.remove(inputMethodName);
togglebutton.classList.add(name);
}
inputMethodName = name;
};
// Accepts a state object with two properties.
// Set isUpperCaseLocked to true if locked
// Set isUpperCase to true when uppercase is enabled
// Use false on both of these properties when uppercase is disabled
var setUpperCaseLock = function kr_setUpperCaseLock(state) {
var capsLockKey = activeIme.querySelector(
'button:not([disabled])' +
'[data-keycode="' + KeyboardEvent.DOM_VK_CAPS_LOCK + '"]'
);
if (!capsLockKey)
return;
if (state.isUpperCaseLocked) {
capsLockKey.classList.remove('kbr-key-active');
capsLockKey.classList.add('kbr-key-hold');
} else if (state.isUpperCase) {
capsLockKey.classList.add('kbr-key-active');
capsLockKey.classList.remove('kbr-key-hold');
} else {
capsLockKey.classList.remove('kbr-key-active');
capsLockKey.classList.remove('kbr-key-hold');
}
capsLockKey.setAttribute('aria-pressed',
state.isUpperCaseLocked || state.isUpperCase);
};
// Draw the keyboard and its components. Meat is here.
var draw = function kr_draw(layout, flags, callback) {
flags = flags || {};
var supportsSwitching = 'mozInputMethod' in navigator ?
navigator.mozInputMethod.mgmt.supportsSwitching() : false;
var keyboardClass = [
layout.layoutName,
layout.pageIndex,
('' + flags.inputType).substr(0, 1),
('' + flags.showCandidatePanel).substr(0, 1),
('' + flags.uppercase).substr(0, 1),
supportsSwitching
].join('-');
currentDrawnKeyboardClass = keyboardClass;
// lets see if we have this keyboard somewhere already...
var container = document.getElementsByClassName(keyboardClass)[0];
if (!container) {
container = document.createElement('div');
container.classList.add('keyboard-type-container');
container.classList.add(keyboardClass);
if (layout.specificCssRule) {
container.classList.add(layout.layoutName);
}
buildKeyboard(container, flags, layout);
ime.appendChild(container);
}
if (activeIme !== container) {
if (activeIme) {
activeIme.style.display = 'none';
delete activeIme.dataset.active;
}
container.style.display = 'block';
container.dataset.active = true;
activeIme = container;
// Only resize UI if layout changed
resizeUI(layout, callback);
}
else if ((ime.classList.contains('landscape') && screenInPortraitMode()) ||
(ime.classList.contains('portrait') && !screenInPortraitMode())) {
// screen orientation changed since last time, need to resize UI
resizeUI(layout, callback);
}
else { // activeIME is already correct
if (callback) {
// The callback might be blocking, so we want to process
// on next tick.
requestAnimationFrame(callback);
}
}
};
/**
* Build keyboard HTML structure
* Pass a container element
*/
var buildKeyboard = function kr_build(container, flags, layout) {
flags = flags || {};
// change scale (Our target screen width is 320px)
// TODO get document.documentElement.style.fontSize
// and use it for multipling changeScale deppending on the value of pixel
// density used in media queries
layoutWidth = layout.width || 10;
var totalWidth = ime.clientWidth;
var placeHolderWidth = totalWidth / layoutWidth;
layout.upperCase = layout.upperCase || {};
var content = document.createDocumentFragment();
layout.keys.forEach((function buildKeyboardRow(row, nrow) {
var kbRow = document.createElement('div');
var rowLayoutWidth = 0;
kbRow.classList.add('keyboard-row');
kbRow.classList.add('row' + nrow);
if (nrow === layout.keys.length - 1) {
kbRow.classList.add('keyboard-last-row');
}
row.forEach((function buildKeyboardColumns(key) {
// Keys may be hidden if the .hidden property contains the inputType
if (key.hidden && key.hidden.indexOf(flags.inputType) !== -1)
return;
// Keys may be visible if the .visibile property contains the inputType
if (key.visible && key.visible.indexOf(flags.inputType) === -1)
return;
var attributeList = [];
var className = '';
if (key.isSpecialKey) {
className = 'special-key';
} else {
// The 'key' role tells an assistive technology that these buttons
// are used for composing text or numbers, and should be easier to
// activate than usual buttons. We keep special keys, like backspace,
// as buttons so that their activation is not performed by mistake.
attributeList.push({
key: 'role',
value: 'key'
});
if (layout.keyClassName) {
className = layout.keyClassName;
}
}
if (key.className) {
className += ' ' + key.className;
}
var ratio = key.ratio || 1;
rowLayoutWidth += ratio;
var outputChar = flags.uppercase ? key.uppercaseValue : key.value;
var keyWidth = placeHolderWidth * ratio;
if (key.disabled) {
attributeList.push({
key: 'disabled',
value: 'true'
});
}
if (key.ariaLabel || ARIA_LABELS[key.value]) {
attributeList.push({
key: 'data-l10n-id',
value: key.ariaLabel || ARIA_LABELS[key.value]
});
} else {
attributeList.push({
key: 'aria-label',
value: key.ariaLabel || key.value
});
}
var keyElement = buildKey(outputChar, className, keyWidth + 'px',
key, key.longPressValue, attributeList);
// a few dataset properties are retained in bug 1044525 because some css
// and ui/integration tests rely on them.
// also to not break them we spell keycode instead of keyCode in dataset
keyElement.dataset.keycode = key.keyCode;
keyElement.dataset.keycodeUpper = key.keyCodeUpper;
if ('targetPage' in key) {
keyElement.dataset.targetPage = key.targetPage;
}
if ('compositeKey' in key) {
keyElement.dataset.compositeKey = key.compositeKey;
}
kbRow.appendChild(keyElement);
setDomElemTargetObject(keyElement, key);
}));
kbRow.dataset.layoutWidth = rowLayoutWidth;
content.appendChild(kbRow);
}));
container.innerHTML = '';
container.appendChild(content);
// Builds candidate panel
if (flags.showCandidatePanel) {
container.insertBefore(
candidatePanelToggleButtonCode(), container.firstChild);
container.insertBefore(candidatePanelCode(), container.firstChild);
showCandidates([]);
container.classList.add('candidate-panel');
} else {
container.classList.remove('candidate-panel');
}
};
// Highlight the key according to the case.
var highlightKey = function kr_updateKeyHighlight(key, options) {
var keyElem = getDomElemFromTargetObject(key);
options = options || {};
keyElem.classList.add('highlighted');
// Show lowercase pop.
if (!options.showUpperCase) {
keyElem.classList.add('lowercase');
}
};
// Unhighlight a key
var unHighlightKey = function kr_unHighlightKey(key) {
var keyElem = getDomElemFromTargetObject(key);
keyElem.classList.remove('highlighted');
keyElem.classList.remove('lowercase');
};
var toggleCandidatePanel = function(expand) {
var candidatePanel = activeIme.querySelector('.keyboard-candidate-panel');
candidatePanel.scrollTop = candidatePanel.scrollLeft = 0;
toggleCandidatePanelWithoutResetScroll(expand);
};
var toggleCandidatePanelWithoutResetScroll = function(expand) {
if (expand) {
ime.classList.remove('candidate-panel');
ime.classList.add('full-candidate-panel');
} else {
ime.classList.remove('full-candidate-panel');
ime.classList.add('candidate-panel');
}
};
var isFullCandidataPanelShown = function() {
return ime.classList.contains('full-candidate-panel');
};
// Show candidates
// Each candidate is a string or an array of two strings
var showCandidates = function(candidates) {
if (!activeIme)
return;
if (inputMethodName == 'vietnamese' && candidates.length) {
// In the Vietnamese IM, the candidates correspond to tones.
// There will be either 2 or 5. All must appear.
numberOfCandidatesPerRow = candidates.length;
candidateUnitWidth =
Math.floor(ime.clientWidth / numberOfCandidatesPerRow);
}
// TODO: Save the element
var candidatePanel = activeIme.querySelector('.keyboard-candidate-panel');
var candidatePanelToggleButton =
activeIme.querySelector('.keyboard-candidate-panel-toggle-button');
if (candidatePanel) {
candidatePanel.dataset.candidateIndicator = 0;
var docFragment = document.createDocumentFragment();
if (inputMethodName == 'latin') {
var dismissButton =
candidatePanel.querySelector('.dismiss-suggestions-button');
dismissButton.classList.add('hide');
// hide dismiss button
if (candidates.length > 0) {
dismissButton.classList.remove('hide');
}
var suggestContainer =
candidatePanel.querySelector('.suggestions-container');
// we want to do all width calculation in CSS, so add a class here
suggestContainer.innerHTML = '';
for (var i = 0; i < 4; i++) {
suggestContainer.classList.remove('has' + i);
}
suggestContainer.classList.add('has' + candidates.length);
candidates.forEach(function buildCandidateEntry(candidate) {
// Make sure all of the candidates are defined
if (!candidate) return;
// Each candidate gets its own div
var div = document.createElement('div');
div.setAttribute('role', 'presentation');
suggestContainer.appendChild(div);
var text, data, correction = false;
if (typeof candidate === 'string') {
if (candidate[0] === '*') { // it is an autocorrection candidate
candidate = candidate.substring(1);
correction = true;
}
data = text = candidate;
}
else {
text = candidate[0];
data = candidate[1];
}
var span = fitText(div, text);
span.setAttribute('role', 'option');
// TODO: the renderer should not be creating a business logic object,
// let's move it to somewhere else.
setDomElemTargetObject(span, {
selection: true,
text: span.textContent,
data: data
});
// ui/integration test needs this
span.dataset.data = data;
if (correction)
span.classList.add('autocorrect');
// Put the text in a span and make it fit in the container
function fitText(container, text) {
container.textContent = '';
if (!text)
return null;
var span = document.createElement('span');
span.textContent = text;
container.appendChild(span);
var limit = .6; // Dont use a scale smaller than this
var scale = IMERender.getScale(span, candidates.length);
// If the text does not fit within the scaling limit,
// reduce the length of the text by replacing characters in
// the middle with ...
if (scale < limit) {
var charactersReplaced = text.length % 2;
while (scale < limit && charactersReplaced < text.length - 2) {
charactersReplaced += 2;
var halflen = (text.length - charactersReplaced) / 2;
span.textContent = text.substring(0, halflen) +
'…' +
text.substring(text.length - halflen);
scale = IMERender.getScale(span, candidates.length);
}
}
// The scaling and centering we do only works if the span
// is display:block or inline-block
span.style.display = 'inline-block';
if (scale < 1) {
span.style.width = (100 / scale) + '%';
span.style.transformOrigin = 'left';
span.style.transform = 'scale(' + scale + ')';
}
else {
span.style.width = '100%';
}
return span;
}
});
} else {
candidatePanel.innerHTML = '';
candidatePanelToggleButton.style.display = 'none';
toggleCandidatePanelWithoutResetScroll(false);
docFragment = candidatesFragmentCode(1, candidates, true);
candidatePanel.appendChild(docFragment);
}
}
};
var showMoreCandidates = function(rowLimit, candidates) {
if (!rowLimit) rowLimit = -1;
if (!candidates) return;
activeIme.querySelector('.keyboard-candidate-panel').appendChild(
candidatesFragmentCode(rowLimit, candidates)
);
};
var getNumberOfCandidatesPerRow = function() {
return numberOfCandidatesPerRow;
};
var candidatesFragmentCode = function(rowLimit, candidates, indentFirstRow) {
var candidatePanel = activeIme.querySelector('.keyboard-candidate-panel');
var candidatePanelToggleButton =
activeIme.querySelector('.keyboard-candidate-panel-toggle-button');
var docFragment = document.createDocumentFragment();
if (candidates.length == 0) {
candidatePanel.dataset.rowCount = 0;
return docFragment;
}
var rowDiv = document.createElement('div');
rowDiv.classList.add('candidate-row');
if (indentFirstRow) {
rowDiv.classList.add('candidate-row-first');
}
var nowUnit = 0;
var rowCount = 0;
if (rowLimit < 0) {
rowLimit = Number.Infinity;
}
var candidatesLength = candidates.length;
for (var i = 0; i < candidatesLength; i++) {
var cand, data;
if (typeof candidates[i] == 'string') {
cand = data = candidates[i];
} else {
cand = candidates[i][0];
data = candidates[i][1];
}
var unit = (cand.length >> 1) + 1;
if (inputMethodName == 'vietnamese') {
unit = 1;
}
var span = document.createElement('span');
span.textContent = cand;
// TODO: the renderer should not be creating a business logic object,
// let's move it to somewhere else.
setDomElemTargetObject(span, {
selection: true,
text: span.textContent,
data: data
});
span.style.width = (unit * candidateUnitWidth - 2) + 'px';
// ui/integration test needs this
span.dataset.data = data;
nowUnit += unit;
var needBreak = false;
if (rowCount == 0 && indentFirstRow &&
nowUnit == numberOfCandidatesPerRow && i != candidatesLength - 1) {
needBreak = true;
}
if (nowUnit > numberOfCandidatesPerRow || needBreak) {
if (rowCount == 0) {
candidatePanelToggleButton.style.display = 'block';
}
if (rowCount >= rowLimit - 1) {
break;
}
docFragment.appendChild(rowDiv);
rowCount++;
rowDiv = document.createElement('div');
rowDiv.classList.add('candidate-row');
nowUnit = unit;
}
rowDiv.appendChild(span);
}
if (i != candidatesLength) {
candidatePanel.dataset.truncated = true;
} else {
delete candidatePanel.dataset.truncated;
}
candidatePanel.dataset.rowCount = rowCount + 1;
candidatePanel.dataset.candidateIndicator =
parseInt(candidatePanel.dataset.candidateIndicator) + i;
docFragment.appendChild(rowDiv);
rowDiv = null;
return docFragment;
};
// Show char alternatives.
var showAlternativesCharMenu = function(key, altChars) {
var keyWidth = (cachedWindowWidth / layoutWidth) | 0;
var renderer = {
ARIA_LABELS: ARIA_LABELS,
buildKey: buildKey,
keyWidth: keyWidth,
screenInPortraitMode: screenInPortraitMode,
renderingManager: renderingManager
};
alternativesCharMenu = new AlternativesCharMenuView(activeIme,
altChars,
renderer);
alternativesCharMenu.show(key);
getDomElemFromTargetObject(key).classList.add('kbr-menu-on');
_menuKey = key;
return alternativesCharMenu;
};
// Hide the alternative menu
var hideAlternativesCharMenu = function km_hideAlternativesCharMenu() {
alternativesCharMenu.hide();
getDomElemFromTargetObject(_menuKey).classList.remove('kbr-menu-on');
};
var _keyArray = []; // To calculate proximity info for predictive text
// Recalculate dimensions for the current render
var resizeUI = function(layout, callback) {
// This function consists of two actual functions
// 1. setKeyWidth (sets the correct width for every key)
// 2. getVisualData (stores visual offsets in internal array)
// these are seperated into separate groups because they do similar
// operations and minimizing reflow causes because of this
function setKeyWidth() {
[].forEach.call(rows, function(rowEl, rIx) {
var rowLayoutWidth = parseInt(rowEl.dataset.layoutWidth, 10);
var keysInRow = rowEl.childNodes.length;
[].forEach.call(rowEl.childNodes, function(keyEl, kIx) {
var key = layout.keys[rIx][kIx];
var wrapperRatio = key.ratio || 1;
var keyRatio = wrapperRatio;
// First and last keys should fill up space
if (kIx === 0) {
keyEl.classList.add('float-key-first');
keyRatio = wrapperRatio + ((layoutWidth - rowLayoutWidth) / 2);
}
else if (kIx === keysInRow - 1) {
keyEl.classList.add('float-key-last');
keyRatio = wrapperRatio + ((layoutWidth - rowLayoutWidth) / 2);
}
keyEl.style.width = (placeHolderWidth | 0) * keyRatio + 'px';
// Default aligns 100%, if they differ set width on the wrapper
if (keyRatio !== wrapperRatio) {
var wrapperEl = keyEl.querySelector('.visual-wrapper');
wrapperEl.style.width =
(placeHolderWidth * wrapperRatio | 0) + 'px';
}
});
});
requestAnimationFrame(getVisualData);
}
function getVisualData() {
// Now that key sizes have been set and adjusted for the row,
// loop again and record the size and position of each. If we
// do this as part of the loop above, we get bad position data.
// We do this in a seperate loop to avoid reflowing
for (var r = 0, row; row = rows[r]; r++) {
for (var k = 0, key; key = row.childNodes[k]; k++) {
var visualKey = key.querySelector('.visual-wrapper');
_keyArray.push({
code: renderingManager.getTargetObject(key).keyCode,
x: visualKey.offsetLeft,
y: visualKey.offsetTop,
width: visualKey.clientWidth,
height: visualKey.clientHeight
});
}
}
candidateUnitWidth =
Math.floor(ime.clientWidth / numberOfCandidatesPerRow);
[].forEach.call(
ime.querySelectorAll('.candidate-row span'),
function(item) {
var unit = (item.textContent.length >> 1) + 1;
if (inputMethodName == 'vietnamese') {
unit = 1;
}
item.style.width = (unit * candidateUnitWidth - 2) + 'px';
}
);
if (callback) {
callback();
}
}
var changeScale;
// Font size recalc
if (screenInPortraitMode()) {
changeScale = cachedWindowWidth / 32;
document.documentElement.style.fontSize = changeScale + 'px';
ime.classList.remove('landscape');
ime.classList.add('portrait');
} else {
changeScale = cachedWindowWidth / 64;
document.documentElement.style.fontSize = changeScale + 'px';
ime.classList.remove('portrait');
ime.classList.add('landscape');
}
_keyArray = [];
// Width calc
if (!layout || !activeIme) {
return;
}
// Remove inline styles on rotation
[].forEach.call(ime.querySelectorAll('.visual-wrapper[style]'),
function(item) {
item.style.width = '';
});
layoutWidth = layout.width || 10;
// Hack alert! we always use 100% of width so we avoid calling
// keyboard.clientWidth because that causes a costy reflow...
var totalWidth = cachedWindowWidth;
var placeHolderWidth = totalWidth / layoutWidth;
var rows = activeIme.querySelectorAll('.keyboard-row');
setKeyWidth();
};
//
// Private Methods
//
//*
// Method that generates the HTML markup for each key
// @label: String inside the key
// @className: String representing a className to be added to the key
// @width: Int to be applied as moz-box-flex
// @dataset: Array of Hash with every { 'key': KEY, 'value': VALUE}
// to be applied as dataset
//*
var candidatePanelCode = function() {
var candidatePanel = document.createElement('div');
candidatePanel.setAttribute('role', 'group');
candidatePanel.dataset.l10nId = 'wordSuggestions2';
candidatePanel.classList.add('keyboard-candidate-panel');
if (inputMethodName)
candidatePanel.classList.add(inputMethodName);
var dismissButton = document.createElement('div');
dismissButton.classList.add('dismiss-suggestions-button');
dismissButton.classList.add('hide');
dismissButton.setAttribute('role', 'button');
dismissButton.dataset.l10nId = 'dismiss2';
candidatePanel.appendChild(dismissButton);
var suggestionContainer = document.createElement('div');
suggestionContainer.classList.add('suggestions-container');
suggestionContainer.setAttribute('role', 'listbox');
candidatePanel.appendChild(suggestionContainer);
// TODO: the renderer should not be creating a business logic object,
// let's move it to somewhere else.
setDomElemTargetObject(dismissButton, {isDismissSuggestionsButton: true});
return candidatePanel;
};
var candidatePanelToggleButtonCode = function() {
var toggleButton = document.createElement('span');
toggleButton.classList.add('keyboard-candidate-panel-toggle-button');
// we're not getting reference of LayoutManager, so define this manually
var KEYCODE_TOGGLE_CANDIDATE_PANEL = -4;
// TODO: the renderer should not be creating a bussiness logic object,
// let's move it to somewhere else.
setDomElemTargetObject(toggleButton, {
keyCode: KEYCODE_TOGGLE_CANDIDATE_PANEL
});
if (inputMethodName) {
toggleButton.classList.add(inputMethodName);
}
toggleButton.style.width =
Math.floor(ime.clientWidth /
numberOfCandidatesPerRow) + 'px';
return toggleButton;
};
var buildKey = function buildKey(label, className, width, key, altNote,
attributeList) {
var altNoteNode;
if (altNote) {
altNoteNode = document.createElement('div');
altNoteNode.className = 'alt-note';
altNoteNode.textContent = altNote;
}
var contentNode = document.createElement('button');
contentNode.className = 'keyboard-key ' + className;
contentNode.style.width = width;
if (attributeList) {
attributeList.forEach(function(attribute) {
contentNode.setAttribute(attribute.key, attribute.value);
});
}
var vWrapperNode = document.createElement('span');
vWrapperNode.className = 'visual-wrapper';
var labelNode = document.createElement('span');
// Using innerHTML here because some labels (so far only the in the
// space key) can be HTML entities.
labelNode.innerHTML = label;
labelNode.className = 'key-element';
labelNode.dataset.label = label;
vWrapperNode.appendChild(labelNode);
// Add uppercase and lowercase pop-up for highlighted key
labelNode = document.createElement('span');
labelNode.innerHTML = label;
labelNode.className = 'uppercase popup';
vWrapperNode.appendChild(labelNode);
labelNode = document.createElement('span');
labelNode.innerHTML = key.lowercaseValue;
labelNode.className = 'lowercase popup';
vWrapperNode.appendChild(labelNode);
if (altNoteNode) {
vWrapperNode.appendChild(altNoteNode);
}
contentNode.appendChild(vWrapperNode);
return contentNode;
};
var getWidth = function getWidth() {
if (!activeIme)
return 0;
return cachedWindowWidth;
};
var getHeight = function getHeight() {
if (!activeIme)
return 0;
var scale = screenInPortraitMode() ?
cachedWindowWidth / 32 :
cachedWindowWidth / 64;
var height = (activeIme.querySelectorAll('.keyboard-row').length *
(5.1 * scale));
if (activeIme.classList.contains('candidate-panel')) {
if (activeIme.querySelector('.keyboard-candidate-panel')
.classList.contains('latin')) {
height += (3.1 * scale);
}
else {
height += (3.2 * scale);
}
}
return height | 0;
};
var getKeyArray = function getKeyArray() {
return _keyArray;
};
var getKeyWidth = function getKeyWidth() {
if (!activeIme)
return 0;
return Math.ceil(ime.clientWidth / layoutWidth);
};
var getKeyHeight = function getKeyHeight() {
if (!activeIme)
return 0;
var rows = activeIme.querySelectorAll('.keyboard-row');
var rowCount = rows.length || 3;
var candidatePanel = activeIme.querySelector('.keyboard-candidate-panel');
var candidatePanelHeight = candidatePanel ? candidatePanel.clientHeight : 0;
return Math.ceil((ime.clientHeight - candidatePanelHeight) / rowCount);
};
// a helper function to set both rendering manager's forward map,
// and renderer's reverse map.
// ideally this should only be used with views (renderer & alt_char_menu.js).
var setDomElemTargetObject = function setDomElemTargetObject(elem, obj) {
renderingManager.domObjectMap.set(elem, obj);
var domElemDict = targetObjDomMap.get(obj) || {};
domElemDict[currentDrawnKeyboardClass] = elem;
targetObjDomMap.set(obj, domElemDict);
};
// a helper function to set both rendering manager's forward map,
// and renderer's reverse map.
// ideally this should only be used with views (render.js & ./js/views/*).
var getDomElemFromTargetObject = function getDomElemFromTargetObject(obj) {
var domElemDict = targetObjDomMap.get(obj) || {};
return domElemDict[currentDrawnKeyboardClass];
};
// Measure the width of the element, and return the scale that
// we can use to make it fit in the container. The return values
// are restricted to a set that matches the standard font sizes
// we use in Gaia.
//
// Note that this only works if the element is display:inline
var scaleContext = null;
var getScale = function(element, noOfSuggestions) {
if (!scaleContext) {
scaleContext = document.createElement('canvas')
.getContext('2d', { willReadFrequently: true });
scaleContext.font = '2rem sans-serif';
}
var elementWidth = scaleContext.measureText(element.textContent).width;
// container width is window width - 36 (for the dismiss button) and then
// depending on the number of suggestions there are
var cw = (cachedWindowWidth - 36) / noOfSuggestions | 0;
cw -= 6; // 6 pixels margin on both sides
var s = cw / elementWidth;
if (s >= 1)
return 1; // 10pt font "Body Large"
if (s >= .8)
return .8; // 8pt font "Body"
if (s >= .7)
return .7; // 7pt font "Body Medium"
if (s >= .65)
return .65; // 6.5pt font "Body Small"
if (s >= .6)
return .6; // 6pt font "Body Mini"
return s; // Something smaller than 6pt.
};
var screenInPortraitMode = function() {
return cachedWindowWidth <= cachedWindowHeight;
};
var _t = {};
function startTime(key) {
// _t[key] = +new Date;
}
function endTime(key) {
// dump('~' + key + ' ' + (+new Date - _t[key]) + '\n');
}
// Exposing pattern
return {
'init': init,
'setInputMethodName': setInputMethodName,
'draw': draw,
get ime() {
return ime;
},
'highlightKey': highlightKey,
'unHighlightKey': unHighlightKey,
'showAlternativesCharMenu': showAlternativesCharMenu,
'hideAlternativesCharMenu': hideAlternativesCharMenu,
'setUpperCaseLock': setUpperCaseLock,
'resizeUI': resizeUI,
'showCandidates': showCandidates,
'getWidth': getWidth,
'getHeight': getHeight,
'getKeyArray': getKeyArray,
'getKeyWidth': getKeyWidth,
'getKeyHeight': getKeyHeight,
'getScale': getScale,