preview almost works

8 files changed, 188 insertions, 9 deletions

diff --git a/src/gui/latexprocess.cpp b/src/gui/latexprocess.cpp
new file mode 100644
index 0000000..f81e883
--- /dev/null
+++ b/src/gui/latexprocess.cpp
@@ -0,0 +1,98 @@
+#include "latexprocess.h"
+#include "tikzit.h"
+
+#include <QDebug>
+#include <QStandardPaths>
+#include <QTemporaryDir>
+
+LatexProcess::LatexProcess(PreviewWindow *preview, QObject *parent) : QObject(parent)
+{
+    _preview = preview;
+    _output = preview->outputTextEdit();
+
+    _proc = new QProcess(this);
+    _proc->setProcessChannelMode(QProcess::MergedChannels);
+    _proc->setWorkingDirectory(_workingDir.path());
+
+    connect(_proc, SIGNAL(readyReadStandardOutput()), this, SLOT(readyReadStandardOutput()));
+    connect(_proc, SIGNAL(finished(int)), this, SLOT(finished(int)));
+
+    // for debug purposes
+    _workingDir.setAutoRemove(false);
+}
+
+void LatexProcess::makePreview(QString tikz)
+{
+    _output->clear();
+
+    if (!_workingDir.isValid()) {
+        _output->appendPlainText("COULD NOT WRITE TO TEMP DIR: " + _workingDir.path() + "\n");
+        return;
+    }
+
+    _output->appendPlainText("USING TEMP DIR: " + _workingDir.path() + "\n");
+    _output->appendPlainText("SEARCHING FOR pdflatex IN:");
+    _output->appendPlainText(qgetenv("PATH"));
+    _output->appendPlainText("\n");
+
+
+    QString pdflatex = QStandardPaths::findExecutable("pdflatex");
+    if (pdflatex.isEmpty()) {
+        _output->appendPlainText("pdflatex NOT FOUND, ABORTING.\n");
+        return;
+    }
+
+    _output->appendPlainText("FOUND: " + pdflatex + "\n");
+
+    // copy active *.tikzstyles file to preview dir
+    if (!tikzit->styleFile().isEmpty() && QFile::exists(tikzit->styleFilePath())) {
+        QFile::copy(tikzit->styleFilePath(), _workingDir.path() + "/" + tikzit->styleFile());
+    }
+
+    // copy tikzit.sty to preview dir
+    QFile::copy(":/tex/sample/tikzit.sty", _workingDir.path() + "/tikzit.sty");
+
+    // write out the file containing the tikz picture
+    QFile f(_workingDir.path() + "/preview.tex");
+    f.open(QIODevice::WriteOnly);
+    QTextStream tex(&f);
+    tex << "\\documentclass{article}\n";
+    tex << "\\usepackage[active,tightpage]{preview}\n";
+    tex << "\\PreviewEnvironment{tikzpicture}\n";
+    tex << "\\usepackage{tikzit}\n";
+    tex << "\\input{" + tikzit->styleFile() + "}\n";
+    tex << "\\begin{document}\n\n";
+    tex << tikz;
+    tex << "\n\n\\end{document}\n";
+
+    f.close();
+    _proc->start(pdflatex, QStringList() << "preview.tex");
+
+}
+
+void LatexProcess::kill()
+{
+    if (_proc->state() == QProcess::Running) _proc->kill();
+}
+
+void LatexProcess::readyReadStandardOutput()
+{
+    QByteArray s = _proc->readAllStandardOutput();
+    _output->appendPlainText(s);
+}
+
+void LatexProcess::finished(int exitCode)
+{
+    QByteArray s = _proc->readAllStandardOutput();
+    _output->appendPlainText(s);
+
+    if (exitCode == 0) {
+        QString pdf = _workingDir.path() + "/preview.pdf";
+        _output->appendPlainText("\n\nSUCCESSFULLY GENERATED: " + pdf + "\n");
+        //_preview->setPdf(pdf);
+        emit previewFinished();
+    } else {
+        _output->appendPlainText("\n\npdflatex RETURNED AN ERROR\n");
+        emit previewFinished();
+    }
+}
diff --git a/src/gui/latexprocess.h b/src/gui/latexprocess.h
new file mode 100644
index 0000000..dc815f2
--- /dev/null
+++ b/src/gui/latexprocess.h
@@ -0,0 +1,33 @@
+#ifndef LATEXPROCESS_H
+#define LATEXPROCESS_H
+
+#include "previewwindow.h"
+
+#include <QObject>
+#include <QProcess>
+#include <QTemporaryDir>
+#include <QPlainTextEdit>
+
+class LatexProcess : public QObject
+{
+    Q_OBJECT
+public:
+    explicit LatexProcess(PreviewWindow *preview, QObject *parent = nullptr);
+    void makePreview(QString tikz);
+    void kill();
+
+private:
+    QTemporaryDir _workingDir;
+    PreviewWindow *_preview;
+    QPlainTextEdit *_output;
+    QProcess *_proc;
+
+public slots:
+    void readyReadStandardOutput();
+    void finished(int exitCode);
+
+signals:
+    void previewFinished();
+};
+
+#endif // LATEXPROCESS_H
diff --git a/src/gui/mainmenu.cpp b/src/gui/mainmenu.cpp
index 8166c59..ab1b898 100644
--- a/src/gui/mainmenu.cpp
+++ b/src/gui/mainmenu.cpp
@@ -228,6 +228,11 @@ void MainMenu::on_actionJump_to_Selection_triggered()
     }
 }
 
+void MainMenu::on_actionRun_LaTeX_triggered()
+{
+    tikzit->makePreview();
+}
+
 
 // View
 void MainMenu::on_actionZoom_In_triggered()
diff --git a/src/gui/mainmenu.h b/src/gui/mainmenu.h
index c14a284..e1477b4 100644
--- a/src/gui/mainmenu.h
+++ b/src/gui/mainmenu.h
@@ -67,6 +67,7 @@ public slots:
     void on_actionParse_triggered();
     void on_actionRevert_triggered();
     void on_actionJump_to_Selection_triggered();
+    void on_actionRun_LaTeX_triggered();
 
     // View
     void on_actionZoom_In_triggered();
diff --git a/src/gui/mainmenu.ui b/src/gui/mainmenu.ui
index 0481c1d..58a2ff0 100644
--- a/src/gui/mainmenu.ui
+++ b/src/gui/mainmenu.ui
@@ -74,6 +74,7 @@
    <addaction name="actionParse"/>
    <addaction name="actionRevert"/>
    <addaction name="actionJump_to_Selection"/>
+   <addaction name="actionRun_LaTeX"/>
   </widget>
   <widget class="QMenu" name="menuView">
    <property name="title">
@@ -335,6 +336,14 @@
     <string>About</string>
    </property>
   </action>
+  <action name="actionRun_LaTeX">
+   <property name="text">
+    <string>Run LaTeX</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+R</string>
+   </property>
+  </action>
   <addaction name="menuFile"/>
   <addaction name="menuEdit"/>
   <addaction name="menuView"/>
diff --git a/src/gui/previewwindow.cpp b/src/gui/previewwindow.cpp
index bca28e3..0a37e1b 100644
--- a/src/gui/previewwindow.cpp
+++ b/src/gui/previewwindow.cpp
@@ -1,12 +1,18 @@
 #include "previewwindow.h"
 #include "ui_previewwindow.h"
 
+#include "tikzit.h"
+#include "latexprocess.h"
+
 #include <QLabel>
 #include <QImage>
 #include <QPixmap>
 #include <QDebug>
-#include <QRegion>
 #include <QSettings>
+#include <QTemporaryDir>
+#include <QFile>
+#include <QTextStream>
+#include <QStandardPaths>
 #include <cmath>
 
 PreviewWindow::PreviewWindow(QWidget *parent) :
@@ -22,23 +28,42 @@ PreviewWindow::PreviewWindow(QWidget *parent) :
         restoreGeometry(geom.toByteArray());
     }
 
-    _doc = Poppler::Document::load("/home/aleks/ak-algebras.pdf");
+    _doc = nullptr;
+    _page = nullptr;
+    //setPdf("/home/aleks/ak-algebras.pdf");
+
+    //qDebug() << "preview dir:" << preparePreview("foo");
+    
+    render();
+}
+
+PreviewWindow::~PreviewWindow()
+{
+    delete ui;
+}
+
+void PreviewWindow::setPdf(QString file)
+{
+    Poppler::Document *oldDoc = _doc;
+    _doc = Poppler::Document::load(file);
     _doc->setRenderHint(Poppler::Document::Antialiasing);
     _doc->setRenderHint(Poppler::Document::TextAntialiasing);
     _doc->setRenderHint(Poppler::Document::TextHinting	);
     _page = _doc->page(0);
-    
     render();
+
+    if (oldDoc != nullptr) delete oldDoc;
 }
 
-PreviewWindow::~PreviewWindow()
+QPlainTextEdit *PreviewWindow::outputTextEdit()
 {
-    delete ui;
+    return ui->output;
 }
 
 void PreviewWindow::closeEvent(QCloseEvent *e) {
     QSettings settings("tikzit", "tikzit");
     settings.setValue("geometry-preview", saveGeometry());
+    QDialog::closeEvent(e);
 }
 
 void PreviewWindow::resizeEvent(QResizeEvent *e) {
@@ -52,6 +77,8 @@ void PreviewWindow::showEvent(QShowEvent *e) {
 }
 
 void PreviewWindow::render() {
+    if (_page == nullptr) return;
+
     QSizeF size = _page->pageSizeF();
 
     QRect rect = ui->scrollArea->visibleRegion().boundingRect();
diff --git a/src/gui/previewwindow.h b/src/gui/previewwindow.h
index f2366d6..c850ce9 100644
--- a/src/gui/previewwindow.h
+++ b/src/gui/previewwindow.h
@@ -2,6 +2,7 @@
 #define PREVIEWWINDOW_H
 
 #include <QDialog>
+#include <QPlainTextEdit>
 #include <poppler/qt5/poppler-qt5.h>
 
 namespace Ui {
@@ -15,6 +16,11 @@ class PreviewWindow : public QDialog
 public:
     explicit PreviewWindow(QWidget *parent = nullptr);
     ~PreviewWindow();
+    void setPdf(QString file);
+    QString preparePreview(QString tikz);
+    QPlainTextEdit *outputTextEdit();
+
+protected:
     void resizeEvent(QResizeEvent *e);
     void showEvent(QShowEvent *e);
     void closeEvent(QCloseEvent *e);
diff --git a/src/gui/previewwindow.ui b/src/gui/previewwindow.ui
index 6bb993a..394fc41 100644
--- a/src/gui/previewwindow.ui
+++ b/src/gui/previewwindow.ui
@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>400</width>
-    <height>300</height>
+    <width>603</width>
+    <height>480</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -40,8 +40,8 @@
            <rect>
             <x>0</x>
             <y>0</y>
-            <width>358</width>
-            <height>233</height>
+            <width>561</width>
+            <height>413</height>
            </rect>
           </property>
           <layout class="QVBoxLayout" name="verticalLayout_4">