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HOCRDocument.cc
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/* -*- Mode: C++; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
/*
* HOCRDocument.cc
* Copyright (C) 2013-2018 Sandro Mani <[email protected]>
*
* gImageReader is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* gImageReader is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <QDir>
#include <QFileInfo>
#include <QIcon>
#include <QSet>
#include <QTextStream>
#include "common.hh"
#include "HOCRDocument.hh"
HOCRDocument::HOCRDocument(QObject* parent)
: QAbstractItemModel(parent) {
}
HOCRDocument::~HOCRDocument() {
qDeleteAll(m_pages);
}
void HOCRDocument::clear() {
beginResetModel();
qDeleteAll(m_pages);
m_pages.clear();
m_pageIdCounter = 0;
endResetModel();
}
QString HOCRDocument::toHTML() const {
QString html = "<body>\n";
for(const HOCRPage* page : m_pages) {
html += page->toHtml(1);
}
html += "</body>\n";
return html;
}
QModelIndex HOCRDocument::addPage(const QDomElement& pageElement, bool cleanGraphics) {
int newRow = m_pages.size();
beginInsertRows(QModelIndex(), newRow, newRow);
m_pages.append(new HOCRPage(pageElement, ++m_pageIdCounter, m_defaultLanguage, cleanGraphics, m_pages.size()));
endInsertRows();
emit dataChanged(index(0, 0), index(m_pages.size() - 1, 0), {Qt::DisplayRole});
return index(newRow, 0);
}
bool HOCRDocument::editItemAttribute(const QModelIndex& index, const QString& name, const QString& value, const QString& attrItemClass) {
HOCRItem* item = mutableItemAtIndex(index);
if(!item) {
return false;
}
item->setAttribute(name, value, attrItemClass);
if(name == "title:x_wconf") {
QModelIndex colIdx = index.sibling(index.row(), 1);
emit dataChanged(colIdx, colIdx, {Qt::DisplayRole});
}
if(name == "lang") {
recursiveDataChanged(index, {Qt::DisplayRole}, {"ocrx_word"});
}
emit itemAttributeChanged(index, name, value);
if(name == "title:bbox") {
recomputeBBoxes(item->parent());
}
return true;
}
// Might be more logical to accept oldParent and oldRow as parameters rather than itemIndex
// (since we need them anyway), if all our callers are likely to know them. Swap does; drag&drop might not.
QModelIndex HOCRDocument::moveItem(const QModelIndex& itemIndex, const QModelIndex& newParent, int newRow) {
HOCRItem* item = mutableItemAtIndex(itemIndex);
HOCRItem* parentItem = mutableItemAtIndex(newParent);
if(!item || (!parentItem && item->itemClass() != "ocr_page")) {
return QModelIndex();
}
QModelIndex ancestor = newParent;
while(ancestor.isValid()) {
if(ancestor == itemIndex) {
return QModelIndex();
}
ancestor = ancestor.parent();
}
int oldRow = itemIndex.row();
QModelIndex oldParent = itemIndex.parent();
if(oldParent == newParent && oldRow < newRow) {
--newRow;
}
beginRemoveRows(oldParent, oldRow, oldRow);
takeItem(item);
endRemoveRows();
recomputeBBoxes(mutableItemAtIndex(oldParent));
beginInsertRows(newParent, newRow, newRow);
insertItem(parentItem, item, newRow);
endInsertRows();
recomputeBBoxes(parentItem);
return itemIndex;
}
QModelIndex HOCRDocument::swapItems(const QModelIndex& parent, int firstRow, int secondRow) {
moveItem(index(firstRow, 0, parent), parent, secondRow);
moveItem(index(secondRow, 0, parent), parent, firstRow);
return index(firstRow, 0, parent);
}
QModelIndex HOCRDocument::mergeItems(const QModelIndex& parent, int startRow, int endRow) {
if(endRow - startRow <= 0) {
return QModelIndex();
}
QModelIndex targetIndex = parent.child(startRow, 0);
HOCRItem* targetItem = mutableItemAtIndex(targetIndex);
if(!targetItem || targetItem->itemClass() == "ocr_page") {
return QModelIndex();
}
QRect bbox = targetItem->bbox();
if(targetItem->itemClass() == "ocrx_word") {
// Merge word items: join text, merge bounding boxes
QString text = targetItem->text();
beginRemoveRows(parent, startRow + 1, endRow);
for(int row = ++startRow; row <= endRow; ++row) {
HOCRItem* item = mutableItemAtIndex(parent.child(startRow, 0));
Q_ASSERT(item);
text += item->text();
bbox = bbox.united(item->bbox());
deleteItem(item);
}
endRemoveRows();
targetItem->setText(text);
emit dataChanged(targetIndex, targetIndex, {Qt::DisplayRole, Qt::ForegroundRole});
} else {
// Merge other items: merge dom trees and bounding boxes
QVector<HOCRItem*> moveChilds;
beginRemoveRows(parent, startRow + 1, endRow);
for(int row = ++startRow; row <= endRow; ++row) {
HOCRItem* item = mutableItemAtIndex(parent.child(startRow, 0));
Q_ASSERT(item);
moveChilds.append(item->takeChildren());
bbox = bbox.united(item->bbox());
deleteItem(item);
}
endRemoveRows();
int pos = targetItem->children().size();
beginInsertRows(targetIndex, pos, pos + moveChilds.size() - 1);
for(HOCRItem* child : moveChilds) {
targetItem->addChild(child);
}
endInsertRows();
}
QString bboxstr = QString("%1 %2 %3 %4").arg(bbox.left()).arg(bbox.top()).arg(bbox.right()).arg(bbox.bottom());
targetItem->setAttribute("title:bbox", bboxstr);
emit itemAttributeChanged(targetIndex, "title:bbox", bboxstr);
return targetIndex;
}
QModelIndex HOCRDocument::splitItem(const QModelIndex& index, int startRow, int endRow) {
if(endRow - startRow < 0) {
return QModelIndex();
}
HOCRItem* item = mutableItemAtIndex(index);
if(!item) {
return QModelIndex();
}
QString itemClass = item->itemClass();
QDomDocument doc;
QDomElement newElement;
if(itemClass == "ocr_carea") {
newElement = doc.createElement("div");
} else if(itemClass == "ocr_par") {
newElement = doc.createElement("p");
} else if(itemClass == "ocr_line") {
newElement = doc.createElement("span");
} else {
return QModelIndex();
}
newElement.setAttribute("class", itemClass);
newElement.setAttribute("title", HOCRItem::serializeAttrGroup(item->getTitleAttributes()));
HOCRItem* newItem = new HOCRItem(newElement, item->page(), item->parent(), item->index() + 1);
beginInsertRows(index.parent(), item->index() + 1, item->index() + 1);
insertItem(item->parent(), newItem, item->index() + 1);
endInsertRows();
QModelIndex newIndex = index.sibling(index.row() + 1, 0);
for(int row = 0; row <= (endRow - startRow); ++row) {
QModelIndex childIndex = index.child(startRow, 0);
HOCRItem* child = mutableItemAtIndex(childIndex);
Q_ASSERT(child);
moveItem(childIndex, newIndex, row);
}
return newIndex;
}
QModelIndex HOCRDocument::addItem(const QModelIndex& parent, const QDomElement& element) {
HOCRItem* parentItem = mutableItemAtIndex(parent);
if(!parentItem) {
return QModelIndex();
}
HOCRItem* item = new HOCRItem(element, parentItem->page(), parentItem);
int pos = parentItem->children().size();
beginInsertRows(parent, pos, pos);
parentItem->addChild(item);
recomputeBBoxes(parentItem);
endInsertRows();
return index(pos, 0, parent);
}
bool HOCRDocument::removeItem(const QModelIndex& index) {
HOCRItem* item = mutableItemAtIndex(index);
if(!item) {
return false;
}
HOCRItem* parentItem = item->parent();
beginRemoveRows(index.parent(), index.row(), index.row());
deleteItem(item);
endRemoveRows();
recomputeBBoxes(parentItem);
return true;
}
QModelIndex HOCRDocument::nextIndex(const QModelIndex& current) {
QModelIndex idx = current;
// If the current index is invalid return first index
if(!idx.isValid()) {
return index(0, 0);
}
// If item has children, return first child
if(rowCount(idx) > 0) {
return idx.child(0, 0);
}
// Return next possible sibling
QModelIndex next = idx.sibling(idx.row() + 1, 0);
while(idx.isValid() && !next.isValid()) {
idx = idx.parent();
next = idx.sibling(idx.row() + 1, 0);
}
if(!idx.isValid()) {
// Wrap around
return index(0, 0);
}
return next;
}
QModelIndex HOCRDocument::prevIndex(const QModelIndex& current) {
QModelIndex idx = current;
// If the current index is invalid return last index
if(!idx.isValid()) {
return index(rowCount() - 1, 0);
}
// Return last possible leaf of previous sibling, if any, or parent
if(idx.row() > 0) {
idx = idx.sibling(idx.row() - 1, 0);
} else {
if(idx.parent().isValid()) {
return idx.parent();
}
// Wrap around
idx = index(rowCount() - 1, 0);
}
while(rowCount(idx) > 0) {
idx = idx.child(rowCount(idx) - 1, 0);
}
return idx;
}
bool HOCRDocument::referencesSource(const QString& filename) const {
for(const HOCRPage* page : m_pages) {
if(page->sourceFile() == filename) {
return true;
}
}
return false;
}
QModelIndex HOCRDocument::searchPage(const QString& filename, int pageNr) const {
for(int iPage = 0, nPages = m_pages.size(); iPage < nPages; ++iPage) {
const HOCRPage* page = m_pages[iPage];
if(page->sourceFile() == filename && page->pageNr() == pageNr) {
return index(iPage, 0);
}
}
return QModelIndex();
}
QModelIndex HOCRDocument::searchAtCanvasPos(const QModelIndex& pageIndex, const QPoint& pos) const {
QModelIndex index = pageIndex;
if(!index.isValid()) {
return QModelIndex();
}
const HOCRItem* item = itemAtIndex(index);
while(true) {
int iChild = 0, nChildren = item->children().size();
for(; iChild < nChildren; ++iChild) {
const HOCRItem* childItem = item->children()[iChild];
if(childItem->bbox().contains(pos)) {
item = childItem;
index = index.child(iChild, 0);
break;
}
}
if(iChild == nChildren) {
break;
}
}
return index;
}
void HOCRDocument::convertSourcePaths(const QString& basepath, bool absolute) {
for(HOCRPage* page : m_pages) {
page->convertSourcePath(basepath, absolute);
}
}
QVariant HOCRDocument::data(const QModelIndex& index, int role) const {
if (!index.isValid()) {
return QVariant();
}
HOCRItem* item = mutableItemAtIndex(index);
if(index.column() == 0) {
switch (role) {
case Qt::DisplayRole:
case Qt::EditRole:
return displayRoleForItem(item);
case Qt::DecorationRole:
return decorationRoleForItem(item);
case Qt::ForegroundRole: {
bool enabled = item->isEnabled();
const HOCRItem* parent = item->parent();
while(enabled && parent) {
enabled = parent->isEnabled();
parent = parent->parent();
}
return QVariant(QColor(208, 80, 82));
}
case Qt::CheckStateRole:
return item->isEnabled() ? Qt::Checked : Qt::Unchecked;
default:
break;
}
} else if(index.column() == 1) {
if(role == Qt::DisplayRole && item->itemClass() == "ocrx_word") {
return item->getTitleAttributes()["x_wconf"];
}
}
return QVariant();
}
bool HOCRDocument::setData(const QModelIndex& index, const QVariant& value, int role) {
if(!index.isValid()) {
return false;
}
HOCRItem* item = mutableItemAtIndex(index);
if(role == Qt::EditRole && item->itemClass() == "ocrx_word") {
item->setText(value.toString());
emit dataChanged(index, index, {Qt::DisplayRole, Qt::ForegroundRole});
return true;
} else if(role == Qt::CheckStateRole) {
item->setEnabled(value == Qt::Checked);
emit dataChanged(index, index, {Qt::CheckStateRole});
recursiveDataChanged(index, {Qt::CheckStateRole});
return true;
}
return false;
}
void HOCRDocument::recursiveDataChanged(const QModelIndex& parent, const QVector<int>& roles, const QStringList& itemClasses) {
int rows = rowCount(parent);
if(rows > 0) {
QModelIndex firstChild = index(0, 0, parent);
QString childItemClass = itemAtIndex(firstChild)->itemClass();
if(itemClasses.isEmpty() || itemClasses.contains(childItemClass)) {
emit dataChanged(firstChild, index(rows - 1, 0, parent), roles);
}
for(int i = 0; i < rows; ++i) {
recursiveDataChanged(index(i, 0, parent), roles, itemClasses);
}
}
}
void HOCRDocument::recomputeBBoxes(HOCRItem* item) {
// Update parent bboxes (except page)
while(item && item->parent()) {
QRect bbox;
for(const HOCRItem* child : item->children()) {
bbox = bbox.united(child->bbox());
}
QString bboxstr = QString("%1 %2 %3 %4").arg(bbox.left()).arg(bbox.top()).arg(bbox.right()).arg(bbox.bottom());
item->setAttribute("title:bbox", bboxstr);
item = item->parent();
}
}
Qt::ItemFlags HOCRDocument::flags(const QModelIndex& index) const {
if (!index.isValid()) {
return 0;
}
HOCRItem* item = mutableItemAtIndex(index);
return Qt::ItemIsEnabled | Qt::ItemIsSelectable | Qt::ItemIsUserCheckable | (item->itemClass() == "ocrx_word" && index.column() == 0 ? Qt::ItemIsEditable : Qt::NoItemFlags);
}
QModelIndex HOCRDocument::index(int row, int column, const QModelIndex& parent) const {
if (!hasIndex(row, column, parent)) {
return QModelIndex();
}
HOCRItem* childItem = nullptr;
if(!parent.isValid()) {
childItem = m_pages.value(row);
} else {
HOCRItem* parentItem = mutableItemAtIndex(parent);
childItem = parentItem->children().value(row);
}
return childItem ? createIndex(row, column, childItem) : QModelIndex();
}
QModelIndex HOCRDocument::parent(const QModelIndex& child) const {
if (!child.isValid()) {
return QModelIndex();
}
HOCRItem* item = mutableItemAtIndex(child)->parent();
if(!item) {
return QModelIndex();
}
int row = item->index();
return row >= 0 ? createIndex(row, 0, item) : QModelIndex();
}
int HOCRDocument::rowCount(const QModelIndex& parent) const {
if (parent.column() > 0) {
return 0;
}
return !parent.isValid() ? m_pages.size() : itemAtIndex(parent)->children().size();
}
int HOCRDocument::columnCount(const QModelIndex& /*parent*/) const {
return 2;
}
QString HOCRDocument::displayRoleForItem(const HOCRItem* item) const {
QString itemClass = item->itemClass();
if(itemClass == "ocr_page") {
const HOCRPage* page = static_cast<const HOCRPage*>(item);
return QString("%1 (%2 %3/%4)").arg(page->title()).arg(tr("Page")).arg(item->index() + 1).arg(m_pages.size());
} else if(itemClass == "ocr_carea") {
return _("Text block");
} else if(itemClass == "ocr_par") {
return _("Paragraph");
} else if(itemClass == "ocr_line") {
return _("Textline");
} else if(itemClass == "ocrx_word") {
return item->text();
} else if(itemClass == "ocr_graphic") {
return _("Graphic");
}
return "";
}
QIcon HOCRDocument::decorationRoleForItem(const HOCRItem* item) const {
QString itemClass = item->itemClass();
if(itemClass == "ocr_page") {
return QIcon(":/icons/item_page");
} else if(itemClass == "ocr_carea") {
return QIcon(":/icons/item_block");
} else if(itemClass == "ocr_par") {
return QIcon(":/icons/item_par");
} else if(itemClass == "ocr_line") {
return QIcon(":/icons/item_line");
} else if(itemClass == "ocrx_word") {
return QIcon(":/icons/item_word");
} else if(itemClass == "ocr_graphic") {
return QIcon(":/icons/item_halftone");
}
return QIcon();
}
void HOCRDocument::insertItem(HOCRItem* parent, HOCRItem* item, int i) {
if(parent) {
parent->insertChild(item, i);
} else if(HOCRPage* page = dynamic_cast<HOCRPage*>(item)) {
page->m_index = i;
m_pages.insert(i++, page);
for(int n = m_pages.size(); i < n; ++i) {
m_pages[i]->m_index = i;
}
emit dataChanged(index(page->index(), 0), index(m_pages.size() - 1, 0), {Qt::DisplayRole});
}
}
void HOCRDocument::deleteItem(HOCRItem* item) {
takeItem(item);
delete item;
}
void HOCRDocument::takeItem(HOCRItem* item) {
if(item->parent()) {
item->parent()->takeChild(item);
} else if(HOCRPage* page = dynamic_cast<HOCRPage*>(item)) {
int i = page->index();
m_pages.remove(i);
for(int n = m_pages.size(); i < n; ++i) {
m_pages[i]->m_index = i;
}
emit dataChanged(index(page->index(), 0), index(m_pages.size() - 1, 0), {Qt::DisplayRole});
}
}
///////////////////////////////////////////////////////////////////////////////
QMap<QString, QString> HOCRItem::s_langCache = QMap<QString, QString>();
QMap<QString, QString> HOCRItem::deserializeAttrGroup(const QString& string) {
QMap<QString, QString> attrs;
for(const QString& attr : string.split(QRegExp("\\s*;\\s*"))) {
int splitPos = attr.indexOf(QRegExp("\\s+"));
attrs.insert(attr.left(splitPos), attr.mid(splitPos + 1));
}
return attrs;
}
QString HOCRItem::serializeAttrGroup(const QMap<QString, QString>& attrs) {
QStringList list;
for(auto it = attrs.begin(), itEnd = attrs.end(); it != itEnd; ++it) {
list.append(QString("%1 %2").arg(it.key(), it.value()));
}
return list.join("; ");
}
QString HOCRItem::trimmedWord(const QString& word, QString* prefix, QString* suffix) {
QRegExp wordRe("^(\\W*)(\\w*)(\\W*)$");
if(wordRe.indexIn(word) != -1) {
if(prefix) {
*prefix = wordRe.cap(1);
}
if(suffix) {
*suffix = wordRe.cap(3);
}
return wordRe.cap(2);
}
return word;
}
HOCRItem::HOCRItem(const QDomElement& element, HOCRPage* page, HOCRItem* parent, int index)
: m_pageItem(page), m_parentItem(parent), m_index(index) {
// Read attrs
QDomNamedNodeMap attributes = element.attributes();
for(int i = 0, n = attributes.size(); i < n; ++i) {
QString attrName = attributes.item(i).nodeName();
if(attrName == "title") {
m_titleAttrs = deserializeAttrGroup(attributes.item(i).nodeValue());
} else {
m_attrs[attrName] = attributes.item(i).nodeValue();
}
}
// Adjust item id based on pageId
if(parent) {
QString idClass = itemClass().mid(itemClass().indexOf("_") + 1);
int counter = page->m_idCounters.value(idClass, 0) + 1;
page->m_idCounters[idClass] = counter;
QString newId = QString("%1_%2_%3").arg(idClass).arg(page->pageId()).arg(counter);
m_attrs["id"] = newId;
}
// Parse item bbox
QStringList bbox = m_titleAttrs["bbox"].split(QRegExp("\\s+"));
if(bbox.size() == 4) {
m_bbox.setCoords(bbox[0].toInt(), bbox[1].toInt(), bbox[2].toInt(), bbox[3].toInt());
}
if(itemClass() == "ocrx_word") {
m_text = element.text();
m_bold = !element.elementsByTagName("strong").isEmpty();
m_italic = !element.elementsByTagName("em").isEmpty();
// For the last word items of the line, ensure the correct hyphen is used
QDomElement nextElement = element.nextSiblingElement();
if(nextElement.isNull()) {
m_text.replace(QRegExp("[-\u2014]\\s*$"), "-");
}
} else if(itemClass() == "ocr_line") {
// Depending on the locale, tesseract can use a comma instead of a dot as decimal separator in the baseline...
m_titleAttrs["baseline"] = m_titleAttrs["baseline"].replace(",", ".");
}
}
HOCRItem::~HOCRItem() {
qDeleteAll(m_childItems);
}
void HOCRItem::addChild(HOCRItem* child) {
m_childItems.append(child);
child->m_parentItem = this;
child->m_pageItem = m_pageItem;
child->m_index = m_childItems.size() - 1;
}
void HOCRItem::insertChild(HOCRItem* child, int i) {
m_childItems.insert(i, child);
child->m_parentItem = this;
child->m_pageItem = m_pageItem;
child->m_index = i++;
for(int n = m_childItems.size(); i < n; ++i) {
m_childItems[i]->m_index = i;
}
}
void HOCRItem::removeChild(HOCRItem* child) {
takeChild(child);
delete child;
}
void HOCRItem::takeChild(HOCRItem* child) {
if(this != child->parent()) {
return;
}
int i = child->index();
m_childItems.remove(i);
for(int n = m_childItems.size(); i < n; ++i) {
m_childItems[i]->m_index = i;
}
}
QVector<HOCRItem*> HOCRItem::takeChildren() {
QVector<HOCRItem*> children(m_childItems);
m_childItems.clear();
return children;
}
QMap<QString, QString> HOCRItem::getAllAttributes() const {
QMap<QString, QString> attrValues;
for(auto it = m_attrs.begin(), itEnd = m_attrs.end(); it != itEnd; ++it) {
attrValues.insert(it.key(), it.value());
}
for(auto it = m_titleAttrs.begin(), itEnd = m_titleAttrs.end(); it != itEnd; ++it) {
attrValues.insert(QString("title:%1").arg(it.key()), it.value());
}
if(itemClass() == "ocrx_word") {
if(!attrValues.contains("title:x_font")) {
attrValues.insert("title:x_font", "");
}
attrValues.insert("bold", fontBold() ? "1" : "0");
attrValues.insert("italic", fontItalic() ? "1" : "0");
}
return attrValues;
}
QMap<QString, QString> HOCRItem::getAttributes(const QList<QString>& names = QList<QString>()) const {
QMap<QString, QString> attrValues;
for(const QString& attrName : names) {
QStringList parts = attrName.split(":");
if(parts.size() > 1) {
Q_ASSERT(parts[0] == "title");
attrValues.insert(attrName, m_titleAttrs.value(parts[1]));
} else if(attrName == "bold") {
attrValues.insert(attrName, fontBold() ? "1" : "0");
} else if(attrName == "italic") {
attrValues.insert(attrName, fontItalic() ? "1" : "0");
} else {
attrValues.insert(attrName, m_attrs[attrName]);
}
}
return attrValues;
}
void HOCRItem::getPropagatableAttributes(QMap<QString, QMap<QString, QSet<QString>>>& occurences) const {
static QMap<QString, QStringList> s_propagatableAttributes = {
{"ocr_line", {"title:baseline"}},
{"ocrx_word", {"lang", "title:x_fsize", "title:x_font", "bold", "italic"}}
};
QString childClass = m_childItems.isEmpty() ? "" : m_childItems.front()->itemClass();
auto it = s_propagatableAttributes.find(childClass);
if(it != s_propagatableAttributes.end()) {
for(HOCRItem* child : m_childItems) {
QMap<QString, QString> attrs = child->getAttributes(it.value());
for(auto attrIt = attrs.begin(), attrItEnd = attrs.end(); attrIt != attrItEnd; ++attrIt) {
occurences[childClass][attrIt.key()].insert(attrIt.value());
}
}
}
if(childClass != "ocrx_word") {
for(HOCRItem* child : m_childItems) {
child->getPropagatableAttributes(occurences);
}
}
}
void HOCRItem::setAttribute(const QString& name, const QString& value, const QString& attrItemClass) {
if(!attrItemClass.isEmpty() && itemClass() != attrItemClass) {
for(HOCRItem* child : m_childItems) {
child->setAttribute(name, value, attrItemClass);
}
return;
}
QStringList parts = name.split(":");
if(name == "bold") {
m_bold = value == "1";
} else if(name == "italic") {
m_italic = value == "1";
} else if(parts.size() < 2) {
m_attrs[name] = value;
} else {
Q_ASSERT(parts[0] == "title");
m_titleAttrs[parts[1]] = value;
if(name == "title:bbox") {
QStringList bbox = value.split(QRegExp("\\s+"));
Q_ASSERT(bbox.size() == 4);
m_bbox.setCoords(bbox[0].toInt(), bbox[1].toInt(), bbox[2].toInt(), bbox[3].toInt());
}
}
}
QString HOCRItem::toHtml(int indent) const {
QString cls = itemClass();
QString tag;
if(cls == "ocr_page" || cls == "ocr_carea" || cls == "ocr_graphic") {
tag = "div";
} else if(cls == "ocr_par") {
tag = "p";
} else {
tag = "span";
}
QString html = QString(indent, ' ') + "<" + tag;
html += QString(" title=\"%1\"").arg(serializeAttrGroup(m_titleAttrs));
for(auto it = m_attrs.begin(), itEnd = m_attrs.end(); it != itEnd; ++it) {
html += QString(" %1=\"%2\"").arg(it.key(), it.value());
}
html += ">";
if(cls == "ocrx_word") {
if(m_bold) {
html += "<strong>";
}
if(m_italic) {
html += "<em>";
}
#if QT_VERSION >= QT_VERSION_CHECK(5, 0, 0)
html += m_text.toHtmlEscaped();
#else
html += Qt::escape(m_text);
#endif
if(m_italic) {
html += "</em>";
}
if(m_bold) {
html += "</strong>";
}
} else {
html += "\n";
for(const HOCRItem* child : m_childItems) {
html += child->toHtml(indent + 1);
}
html += QString(indent, ' ');
}
html += "</" + tag + ">\n";
return html;
}
QPair<double, double> HOCRItem::baseLine() const {
static const QRegExp baseLineRx = QRegExp("([+-]?\\d+\\.?\\d*)\\s+([+-]?\\d+\\.?\\d*)");
if(baseLineRx.indexIn(m_titleAttrs["baseline"]) != -1) {
return qMakePair(baseLineRx.cap(1).toDouble(), baseLineRx.cap(2).toDouble());
}
return qMakePair(0.0, 0.0);
}
bool HOCRItem::parseChildren(const QDomElement& element, QString language) {
// Determine item language (inherit from parent if not specified)
QString elemLang = element.attribute("lang");
if(!elemLang.isEmpty()) {
auto it = s_langCache.find(elemLang);
if(it == s_langCache.end()) {
it = s_langCache.insert(elemLang, "en_US");
}
m_attrs.remove("lang");
language = it.value();
}
if(itemClass() == "ocrx_word") {
m_attrs["lang"] = language;
return !m_text.isEmpty();
}
bool haveWords = false;
QDomElement childElement = element.firstChildElement();
while(!childElement.isNull()) {
m_childItems.append(new HOCRItem(childElement, m_pageItem, this, m_childItems.size()));
haveWords |= m_childItems.last()->parseChildren(childElement, language);
childElement = childElement.nextSiblingElement();
}
return haveWords;
}
///////////////////////////////////////////////////////////////////////////////
HOCRPage::HOCRPage(const QDomElement& element, int pageId, const QString& language, bool cleanGraphics, int index)
: HOCRItem(element, this, nullptr, index), m_pageId(pageId) {
m_attrs["id"] = QString("page_%1").arg(pageId);
m_sourceFile = m_titleAttrs["image"].replace(QRegExp("^['\"]"), "").replace(QRegExp("['\"]$"), "");
m_pageNr = m_titleAttrs["ppageno"].toInt();
// Code to handle pageno -> ppageno typo in previous versions of gImageReader
if(m_pageNr == 0) {
m_pageNr = m_titleAttrs["pageno"].toInt();
m_titleAttrs["ppageno"] = m_titleAttrs["pageno"];
m_titleAttrs.remove("pageno");
}
m_angle = m_titleAttrs["rot"].toDouble();
m_resolution = m_titleAttrs["res"].toInt();
QDomElement childElement = element.firstChildElement("div");
while(!childElement.isNull()) {
HOCRItem* item = new HOCRItem(childElement, this, this, m_childItems.size());
m_childItems.append(item);
if(!item->parseChildren(childElement, language)) {
// No word children -> treat as graphic
if(cleanGraphics && (item->bbox().width() < 10 || item->bbox().height() < 10)) {
// Ignore graphics which are less than 10 x 10
delete m_childItems.takeLast();
} else {
item->setAttribute("class", "ocr_graphic");
qDeleteAll(item->m_childItems);
item->m_childItems.clear();
}
}
childElement = childElement.nextSiblingElement();
}
}
QString HOCRPage::title() const {
return QString("%1 [%2]").arg(QFileInfo(m_sourceFile).fileName()).arg(m_pageNr);
}
void HOCRPage::convertSourcePath(const QString& basepath, bool absolute) {
if(absolute && !QFileInfo(m_sourceFile).isAbsolute()) {
m_sourceFile = QDir::cleanPath(QDir(basepath).absoluteFilePath(m_sourceFile));
} else if(!absolute && QFileInfo(m_sourceFile).isAbsolute() && m_sourceFile.startsWith(basepath)) {
m_sourceFile = QString(".%1%2").arg("/").arg(QDir(basepath).relativeFilePath(m_sourceFile));
}
m_titleAttrs["image"] = QString("'%1'").arg(m_sourceFile);
}