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Julian's html-search-bar work

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Julian Viereck 2012-09-11 09:30:44 -07:00 committed by Artur Adib
parent e98eba1b11
commit da57e0f89e
3 changed files with 611 additions and 17 deletions
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52
web/viewer.css
View File

@ -245,7 +245,7 @@ html[dir='rtl'] #sidebarContent {
0 1px 1px hsla(0,0%,0%,.1);
}
#toolbarViewer {
#toolbarViewer, .findbar {
position: relative;
height: 32px;
background-image: url(images/texture.png),
@ -265,6 +265,32 @@ html[dir='rtl'] #sidebarContent {
0 1px 0 hsla(0,0%,0%,.15),
0 1px 1px hsla(0,0%,0%,.1);
}
.findbar {
top: 40px;
left: 40px;
position: absolute;
z-index: 100;
height: 20px;
min-width: 16px;
padding: 3px 6px 3px 6px;
margin: 4px 2px 4px 0;
border: 1px solid transparent;
border-radius: 2px;
color: hsl(0,0%,85%);
font-size: 12px;
line-height: 14px;
text-align: left;
-webkit-user-select:none;
-moz-user-select:none;
cursor: default;
}
.notFound {
background-color: rgb(255, 137, 153);
}
html[dir='ltr'] #toolbarViewerLeft {
margin-left: -1px;
}
@ -1069,6 +1095,30 @@ canvas {
white-space:pre;
}
.textLayer .highlight {
margin: -1px;
padding: 1px;
background-color: rgba(0, 137, 26, 0.2);
border-radius: 4px;
}
.textLayer .highlight.begin {
border-radius: 4px 0px 0px 4px;
}
.textLayer .highlight.end {
border-radius: 0px 4px 4px 0px;
}
.textLayer .highlight.middle {
border-radius: 0px;
}
.textLayer .highlight.selected {
background-color: rgba(255, 0, 0, 0.2);
}
/* TODO: file FF bug to support ::-moz-selection:window-inactive
so we can override the opaque grey background when the window is inactive;
see https://bugzilla.mozilla.org/show_bug.cgi?id=706209 */

13
web/viewer.html
View File

@ -108,9 +108,20 @@ limitations under the License.
</div> <!-- sidebarContainer -->
<div id="mainContainer">
<div class="findbar hidden" id="findbar">
<label for="findInput">Find: </label>
<input id="findInput" type="search">
<button id="findPrevious">&lt;</button>
<button id="findNext">&gt;</button>
<input type="checkbox" id="findHighlightAll">
<label for="findHighlightAll">Highlight all</label>
<input type="checkbox" id="findMatchCase">
<label for="findMatchCase">Match case</label>
<span id="findMsgWrap" class="hidden">Reached end of page, continued from top</span>
<span id="findMsgNotFound" class="hidden">Phrase not found</span>
</div>
<div class="toolbar">
<div id="toolbarContainer">
<div id="toolbarViewer">
<div id="toolbarViewerLeft">
<button id="sidebarToggle" class="toolbarButton" title="Toggle Sidebar" tabindex="4" data-l10n-id="toggle_slider">

563
web/viewer.js
View File

@ -208,6 +208,345 @@ var Settings = (function SettingsClosure() {
var cache = new Cache(kCacheSize);
var currentPageNumber = 1;
var PDFFindController = {
startedTextExtraction: false,
// If active, search resulsts will be highlighted.
active: false,
// Stores the text for each page.
pageContents: [],
pageMatches: [],
selected: {
pageIdx: 0,
matchIdx: 0
},
dirtyMatch: false,
findTimeout: null,
initialize: function() {
var events = [
'find',
'findagain',
'findhighlightallchange',
'findcasesensitivitychange'
];
this.handelEvent = this.handelEvent.bind(this);
for (var i = 0; i < events.length; i++) {
window.addEventListener(events[i], this.handelEvent);
}
},
calcFindMatch: function(pageContent) {
// TODO: Handle the other search options here as well.
var query = this.state.query;
var queryLen = query.length;
if (queryLen === 0)
return [];
var matches = [];
var matchIdx = -queryLen;
while (true) {
matchIdx = pageContent.indexOf(query, matchIdx + queryLen);
if (matchIdx === -1) {
break;
}
matches.push(matchIdx);
}
return matches;
},
extractText: function() {
if (this.startedTextExtraction)
return;
this.startedTextExtraction = true;
var self = this;
function extractPageText(pageIndex) {
PDFView.pages[pageIndex].getTextContent().then(
function textContentResolved(data) {
// Bulid the search string.
var bidiTexts = data.bidiTexts;
var str = '';
for (var i = 0; i < bidiTexts.length; i++) {
str += bidiTexts[i].str;
}
// Store the pageContent as a string.
self.pageContents.push(str);
// Ensure there is a empty array of matches.
self.pageMatches.push([]);
if ((pageIndex + 1) < PDFView.pages.length)
extractPageText(pageIndex + 1);
}
);
}
extractPageText(0);
},
handelEvent: function(e) {
this.state = e.detail;
if (e.detail.findPrevious === undefined) {
this.dirtyMatch = true;
}
clearTimeout(this.findTimeout);
if (e.type === 'find') {
// Only trigger the find action after 250ms of silence.
this.findTimeout = setTimeout(this.performFind.bind(this), 250);
} else {
this.performFind();
}
},
updatePage: function(idx) {
var page = PDFView.pages[idx];
if (page.textLayer) {
page.textLayer.updateMatches();
} else if (this.selected.pageIdx === idx) {
// If the page is selected, scroll the page into view, which triggers
// rendering the page, which adds the textLayer. Once the textLayer is
// build, it will scroll onto the selected match.
page.scrollIntoView();
}
},
performFind: function() {
// Recalculate all the matches.
// TODO: Make one match show up as the current match
var pages = PDFView.pages;
var pageContents = this.pageContents;
var pageMatches = this.pageMatches;
this.active = true;
if (this.dirtyMatch) {
// Need to recalculate the matches.
this.dirtyMatch = false;
this.selected = {
pageIdx: -1,
matchIdx: -1
};
// TODO: Make this way more lasily (aka. efficient) - e.g. calculate only
// the matches for the current visible pages.
var firstMatch = true;
for (var i = 0; i < pageContents.length; i++) {
var matches = pageMatches[i] = this.calcFindMatch(pageContents[i]);
if (firstMatch && matches.length !== 0) {
firstMatch = false;
this.selected = {
pageIdx: i,
matchIdx: 0
};
}
this.updatePage(i, true);
}
} else {
// If there is NO selection, then there is no match at all -> no sense to
// handel previous/next action.
if (this.selected.pageIdx === -1)
return;
// Handle findAgain case.
var previous = this.state.findPrevious;
var sPageIdx = this.selected.pageIdx;
var sMatchIdx = this.selected.matchIdx;
if (previous) {
// Select previous match.
if (sMatchIdx !== 0) {
this.selected.matchIdx -= 1;
} else {
var len = pageMatches.length;
for (var i = sPageIdx - 1; i != sPageIdx; i--) {
if (i < 0)
i += len;
if (pageMatches[i].length !== 0) {
this.selected = {
pageIdx: i,
matchIdx: pageMatches[i].length - 1
};
break;
}
}
// If pageIdx stayed the same, select last match on the page.
if (this.selected.pageIdx === sPageIdx) {
this.selected.matchIdx = pageMatches[sPageIdx].length - 1;
}
}
} else {
// Select next match.
if (pageMatches[sPageIdx].length !== sMatchIdx + 1) {
this.selected.matchIdx += 1;
} else {
var len = pageMatches.length;
for (var i = sPageIdx + 1; i < len + sPageIdx; i++) {
if (pageMatches[i % len].length !== 0) {
this.selected = {
pageIdx: i % len,
matchIdx: 0
};
break;
}
}
// If pageIdx stayed the same, select last match on the page.
if (this.selected.pageIdx === sPageIdx) {
this.selected.matchIdx = 0;
}
}
}
this.updatePage(sPageIdx, sPageIdx === this.selected.pageIdx);
if (sPageIdx !== this.selected.pageIdx) {
this.updatePage(this.selected.pageIdx, true);
}
}
}
};
var PDFFindBar = {
// TODO: Enable the FindBar *AFTER* the pagesPromise in the load function
// got resolved
opened: false,
FIND_FOUND: 0, // Successful find
FIND_NOTFOUND: 1, // Unsuccessful find
FIND_WRAPPED: 2, // Successful find, but wrapped around
initialize: function() {
this.bar = document.getElementById('findbar');
this.toggleButton = document.getElementById('viewSearch');
this.findField = document.getElementById('findInput');
this.highlightAll = document.getElementById('findHighlightAll');
this.caseSensitive = document.getElementById('findMatchCase');
this.findMsgWrap = document.getElementById('findMsgWrap');
this.findMsgNotFound = document.getElementById('findMsgNotFound');
var self = this;
this.toggleButton.addEventListener('click',
function() {
self.toggle();
});
this.findField.addEventListener('input', function() {
self.dispatchEvent('');
});
// TODO: Add keybindings like enter, shift-enter, CMD-G etc. to go to prev/
// next match when the findField is selected.
document.getElementById('findPrevious').addEventListener('click',
function() {
self.dispatchEvent('again', true);
});
document.getElementById('findNext').addEventListener('click',
function() {
self.dispatchEvent('again', false);
});
this.highlightAll.addEventListener('click',
function() {
self.dispatchEvent('highlightallchange');
});
this.caseSensitive.addEventListener('click',
function() {
self.dispatchEvent('casesensitivitychange');
});
},
dispatchEvent: function(aType, aFindPrevious) {
var event = document.createEvent('CustomEvent');
event.initCustomEvent('find' + aType, true, true, {
query: this.findField.value,
caseSensitive: this.caseSensitive.checked,
highlightAll: this.highlightAll.checked,
findPrevious: aFindPrevious
});
return window.dispatchEvent(event);
},
updateUIState: function(aState) {
var notFound = false;
var wrapped = false;
switch (aState) {
case this.FIND_FOUND:
break;
case this.FIND_NOTFOUND:
notFound = true;
break;
case this.FIND_WRAPPED:
wrapped = true;
break;
}
if (notFound) {
this.findField.classList.add('notFound');
this.findMsgNotFound.classList.remove('hidden');
} else {
this.findField.classList.remove('notFound');
this.findMsgNotFound.classList.add('hidden');
}
if (wrapped) {
this.findMsgWrap.classList.remove('hidden');
} else {
this.findMsgWrap.classList.add('hidden');
}
},
open: function() {
if (this.opened) return;
this.opened = true;
this.toggleButton.classList.add('toggled');
this.bar.classList.remove('hidden');
this.findField.select();
this.findField.focus();
},
close: function() {
if (!this.opened) return;
this.opened = false;
this.toggleButton.classList.remove('toggled');
this.bar.classList.add('hidden');
PDFFindController.active = false;
},
toggle: function() {
if (this.opened) {
this.close();
} else {
this.open();
}
}
};
var PDFView = {
pages: [],
thumbnails: [],
@ -242,6 +581,9 @@ var PDFView = {
this.watchScroll(thumbnailContainer, this.thumbnailViewScroll,
this.renderHighestPriority.bind(this));
PDFFindBar.initialize();
PDFFindController.initialize();
this.initialized = true;
container.addEventListener('scroll', function() {
self.lastScroll = Date.now();
@ -736,6 +1078,9 @@ var PDFView = {
thumbnails.push(thumbnailView);
var pageRef = page.ref;
pagesRefMap[pageRef.num + ' ' + pageRef.gen + ' R'] = i;
// Trigger text extraction. TODO: Make this happen lasyliy if needed.
PDFFindController.extractText();
}
self.pagesRefMap = pagesRefMap;
@ -1229,6 +1574,7 @@ var PageView = function pageView(container, pdfPage, id, scale,
this.resume = null;
this.textContent = null;
this.textLayer = null;
var anchor = document.createElement('a');
anchor.name = '' + this.id;
@ -1475,7 +1821,8 @@ var PageView = function pageView(container, pdfPage, id, scale,
textLayerDiv.className = 'textLayer';
div.appendChild(textLayerDiv);
}
var textLayer = textLayerDiv ? new TextLayerBuilder(textLayerDiv) : null;
var textLayer = this.textLayer =
textLayerDiv ? new TextLayerBuilder(textLayerDiv, this.id - 1) : null;
var scale = this.scale, viewport = this.viewport;
canvas.width = viewport.width;
@ -1834,21 +2181,25 @@ var CustomStyle = (function CustomStyleClosure() {
return CustomStyle;
})();
var TextLayerBuilder = function textLayerBuilder(textLayerDiv) {
var TextLayerBuilder = function textLayerBuilder(textLayerDiv, pageIdx) {
var textLayerFrag = document.createDocumentFragment();
this.textLayerDiv = textLayerDiv;
this.layoutDone = false;
this.divContentDone = false;
this.pageIdx = pageIdx;
this.matches = [];
this.beginLayout = function textLayerBuilderBeginLayout() {
this.textDivs = [];
this.textLayerQueue = [];
this.renderingDone = false;
};
this.endLayout = function textLayerBuilderEndLayout() {
this.layoutDone = true;
this.insertDivContent();
},
};
this.renderLayer = function textLayerBuilderRenderLayer() {
var self = this;
@ -1862,8 +2213,11 @@ var TextLayerBuilder = function textLayerBuilder(textLayerDiv) {
if (textDivs.length > 100000)
return;
while (textDivs.length > 0) {
var textDiv = textDivs.shift();
var i = textDivs.length;
while (i !== 0) {
i--;
var textDiv = textDivs[i];
textLayerFrag.appendChild(textDiv);
ctx.font = textDiv.style.fontSize + ' ' + textDiv.style.fontFamily;
@ -1875,9 +2229,14 @@ var TextLayerBuilder = function textLayerBuilder(textLayerDiv) {
CustomStyle.setProp('transform' , textDiv,
'scale(' + textScale + ', 1)');
CustomStyle.setProp('transformOrigin' , textDiv, '0% 0%');
textLayerDiv.appendChild(textDiv);
}
}
this.renderingDone = true;
this.updateMatches();
textLayerDiv.appendChild(textLayerFrag);
};
@ -1944,6 +2303,184 @@ var TextLayerBuilder = function textLayerBuilder(textLayerDiv) {
this.textContent = textContent;
this.insertDivContent();
};
this.convertMatches = function textLayerBuilderConvertMatches(matches) {
var i = 0;
var iIndex = 0;
var bidiTexts = this.textContent.bidiTexts;
var end = bidiTexts.length - 1;
var queryLen = PDFFindController.state.query.length;
var lastDivIdx = -1;
var pos;
var ret = [];
// Loop over all the matches.
for (var m = 0; m < matches.length; m++) {
var matchIdx = matches[m];
// # Calculate the begin position.
// Loop over the divIdxs.
while (i !== end && matchIdx >= (iIndex + bidiTexts[i].str.length)) {
iIndex += bidiTexts[i].str.length;
i++;
}
// TODO: Do proper handling here if something goes wrong.
if (i == bidiTexts.length) {
console.error('Could not find matching mapping');
}
var match = {
begin: {
divIdx: i,
offset: matchIdx - iIndex
}
};
// # Calculate the end position.
matchIdx += queryLen;
// Somewhat same array as above, but use a > instead of >= to get the end
// position right.
while (i !== end && matchIdx > (iIndex + bidiTexts[i].str.length)) {
iIndex += bidiTexts[i].str.length;
i++;
}
match.end = {
divIdx: i,
offset: matchIdx - iIndex
};
ret.push(match);
}
return ret;
};
this.renderMatches = function textLayerBuilder_renderMatches(matches) {
var bidiTexts = this.textContent.bidiTexts;
var textDivs = this.textDivs;
var prevEnd = null;
var isSelectedPage = this.pageIdx === PDFFindController.selected.pageIdx;
var selectedMatchIdx = PDFFindController.selected.matchIdx;
var infty = {
divIdx: -1,
offset: undefined
};
function beginText(begin, className) {
var divIdx = begin.divIdx;
var div = textDivs[divIdx];
div.innerHTML = '';
var content = bidiTexts[divIdx].str.substring(0, begin.offset);
var node = document.createTextNode(content);
if (className) {
var isSelected = isSelectedPage &&
divIdx === selectedMatchIdx;
var span = document.createElement('span');
span.className = className + (isSelected ? ' selected' : '');
span.appendChild(node);
div.appendChild(span);
return;
}
div.appendChild(node);
}
function appendText(from, to, className) {
var divIdx = from.divIdx;
var div = textDivs[divIdx];
var content = bidiTexts[divIdx].str.substring(from.offset, to.offset);
var node = document.createTextNode(content);
if (className) {
var span = document.createElement('span');
span.className = className;
span.appendChild(node);
div.appendChild(span);
return;
}
div.appendChild(node);
}
function highlightDiv(divIdx, className) {
textDivs[divIdx].className = className;
}
for (var i = 0; i < matches.length; i++) {
var match = matches[i];
var begin = match.begin;
var end = match.end;
var isSelected = isSelectedPage && i === selectedMatchIdx;
var highlightSuffix = (isSelected ? ' selected' : '');
if (isSelected)
scrollIntoView(textDivs[begin.divIdx], {top: -50});
// Match inside new div.
if (!prevEnd || begin.divIdx !== prevEnd.divIdx) {
// If there was a previous div, then add the text at the end
if (prevEnd !== null) {
appendText(prevEnd, infty);
}
// clears the divs and set the content until the begin point.
beginText(begin);
} else {
appendText(prevEnd, begin);
}
if (begin.divIdx === end.divIdx) {
appendText(begin, end, 'highlight' + highlightSuffix);
} else {
appendText(begin, infty, 'highlight begin' + highlightSuffix);
for (var n = begin.divIdx + 1; n < end.divIdx; n++) {
highlightDiv(n, 'highlight middle' + highlightSuffix);
}
beginText(end, 'highlight end' + highlightSuffix);
}
prevEnd = end;
}
if (prevEnd) {
appendText(prevEnd, infty);
}
};
this.updateMatches = function textLayerUpdateMatches() {
// Only show matches, once all rendering is done.
if (!this.renderingDone)
return;
// Clear out all matches.
var matches = this.matches;
var textDivs = this.textDivs;
var bidiTexts = this.textContent.bidiTexts;
var clearedUntilDivIdx = -1;
for (var i = 0; i < matches.length; i++) {
var match = matches[i];
var begin = Math.max(clearedUntilDivIdx, match.begin.divIdx);
for (var n = begin; n <= match.end.divIdx; n++) {
var div = bidiTexts[n].str;
div.textContent = div.textContent;
div.className = '';
}
clearedUntilDivIdx = match.end.divIdx + 1;
}
if (!PDFFindController.active)
return;
// Convert the matches on the page controller into the match format used
// for the textLayer.
this.matches = matches =
this.convertMatches(PDFFindController.pageMatches[this.pageIdx] || []);
this.renderMatches(this.matches);
};
};
document.addEventListener('DOMContentLoaded', function webViewerLoad(evt) {
@ -2059,16 +2596,6 @@ document.addEventListener('DOMContentLoaded', function webViewerLoad(evt) {
PDFView.switchSidebarView('outline');
});
document.getElementById('viewSearch').addEventListener('click',
function() {
PDFView.switchSidebarView('search');
});
document.getElementById('searchButton').addEventListener('click',
function() {
PDFView.search();
});
document.getElementById('previous').addEventListener('click',
function() {
PDFView.page--;
@ -2331,6 +2858,12 @@ window.addEventListener('keydown', function keydown(evt) {
// control is selected or not.
if (cmd == 1 || cmd == 8) { // either CTRL or META key.
switch (evt.keyCode) {
//#if !(FIREFOX || MOZCENTRAL)
case 70:
PDFFindBar.toggle();
handled = true;
break;
//#endif
case 61: // FF/Mac '='
case 107: // FF '+' and '='
case 187: // Chrome '+'